Reston, VA

12:14 PM EDT on May 20, 2013 (GMT -0400)
Elev: 384 ft
Lon: 77.3° W
Lat: 39.0° N
Source
Rapid Fire Updates™
 Updated 12:14 PM EDT Get Free Weather Stickers® Share:
Your Custom Weather Sticker®

Copy the following lines of HTML:
Get more styles and options for your Weather Sticker® here.
News
Huge Rock Crashes Into Moon, Sparks Giant Explosion
May 20, 2013
The moon has a new hole on its surface thanks to a boulder that slammed into it in March, creating the biggest explosion scientists have seen on the moon since they started monitoring it.
Deadly Rainstorms Kill 55 in Southern China
May 20, 2013
Chinese authorities say rainstorms that battered southern China this week have killed 55 people and left 14 others missing.
Photos: Deadly Tornado Outbreak Strikes Plains
May 20, 2013
A tornado outbreak struck the Plains states on May 19, 2013, leaving widespread damage in its wake.
Recap: Tornadoes Rake Oklahoma, Kansas, Iowa
May 20, 2013
The weather imagery, video and recap from tornadoes in the Plains on May 19, 2013.
Amazing Nature, Captured
May 20, 2013
These stunning images of nature captured across the globe will change the way you view our world.
Photos: Tornado Devastation in Plains
May 20, 2013
Photos and social media reports of severe weather damage over the weekend in Oklahoma, Iowa and Kansas.
Death Toll Rises in Tornado Outbreak
May 20, 2013
Homes and subdivisions were decimated by a tornado outbreak that struck the Plains on May 19, 2013.
Tornado Hits OKC Suburb, Kicking Up Debris
May 19, 2013
A tornado kicked up debris in an Oklahoma City suburb and threatened a number of tourist attractions on historic Route 66 but there were no immediate reports of injuries or major damage.
Tornado Touches Down in Wichita
May 19, 2013
State emergency officials are monitoring a tornado in the Wichita area.
Live Updates: Severe Weather Outbreak
May 20, 2013
The latest breaking news, tornado warnings, photos and more.
Mice Return From a Month in Space
May 19, 2013
Mice and other critters return from a month long stay in space.
Heavy Rains Cause Flooding in North Georgia
May 20, 2013
Some locations have seen 5 to 6 inches of rainfall.
May Severe Outbreak: Day 1 Recap
May 19, 2013
See the tornado, damaging wind and large hail reports on our interactive map.
Tornado Hunt Captures Multiple Tornadoes in Progress
May 19, 2013
See images and video from the Plains as severe thunderstorms left their mark.
Tornado Warning Drought May End This Weekend
May 19, 2013
Parts of the Plains, Midwest have seen a startling absence of tornadoes.
64, Including Saudi Arabian Woman, Scale Mount Everest
May 18, 2013
More than five dozens climbers successfully scaled Mount Everest.
Flash Flooding Swamps Parts of Alabama
May 19, 2013
The photos, reports, and perspective behind flooding rain in parts of Alabama Saturday.
Active Volcano Captured in Stunning Photos
May 17, 2013
Indonesian-born and Qatar-based photographer Helminadia Ranford captured breathtaking photos of Mt. Bromo, an active volcano in East Java, Indonesia.
NASA: New Pump Resolves Big Space Station Leak
May 17, 2013
A spacewalk has repaired a leak on the International Space Station, NASA said.
Where Winter Won't End
May 18, 2013
Spring warmth has arrived in most of the U.S., except this state.
More News Articles
Weather Summary
Kari Kiefer
Weather Underground Forecast for Monday, May 20, 2013.

Heavy rains and severe thunderstorm activity will continue for areas of the Plains into the Midwest on Monday as a broad, nearly stationary low sits over the Northern Plains. As the system lingers, ample moisture and energy will stream northward from the Gulf of Mexico, while an associated cold front extends from the low into Iowa and back across the Central and Southern Plains. The sharpening cold front combined with a dry line in the Southern Plains and the moisture laden conditions of the region will allow for multiple clusters of thunderstorms to develop across the Plains and into the Mid-Mississippi Valley. Portions of Oklahoma, southeastern Kansas, extreme, northwestern Arkansas, an southwestern Missouri are at moderate risk of severe thunderstorm activity as environmental conditions remain favorable for strong tornadoes, damaging wind gusts, and very large hail. Areas surrounding this moderate risk region from the parts of the southwestern Texas into the Upper Great Lakes are at slight risk of severe thunderstorm development with hail and isolated tornadoes.

Meanwhile, areas of heavy rain and widely scattered showers will persist near the low and it's associated warm front in portions of the north-central U.S. Continued precipitation in these already saturate areas combined with rapid runoff will continue flood concerns from parts of North Dakota into northwestern Wisconsin.

Elsewhere, scattered showers and thunderstorms are expected in the Mid-Atlantic and southeastern corner of the nation as a weak upper trough of low pressure drops southward over the region. Locally heavy rain amounts of up to 2 inches may result in areas of minor flooding, especially in poor drainage areas. To the north, additional showers will be possible in the Northeast.
Weather Underground Forecast for Monday, May 20, 2013.

Heavy rains and severe thunderstorm activity will continue for areas of the Plains into the Midwest on Monday as a broad, nearly stationary low sits over the Northern Plains. As the system lingers, ample moisture and energy will stream northward from the Gulf of Mexico, while an associated cold front extends from the low into Iowa and back across the Central and Southern Plains. The sharpening cold front combined with a dry line in the Southern Plains and the moisture laden conditions of the region will allow for multiple clusters of thunderstorms to develop across the Plains and into the Mid-Mississippi Valley. Portions of Oklahoma, southeastern Kansas, extreme, northwestern Arkansas, an southwestern Missouri are at moderate risk of severe thunderstorm activity as environmental conditions remain favorable for strong tornadoes, damaging wind gusts, and very large hail. Areas surrounding this moderate risk region from the parts of the southwestern Texas into the Upper Great Lakes are at slight risk of severe thunderstorm development with hail and isolated tornadoes.

Meanwhile, areas of heavy rain and widely scattered showers will persist near the low and it's associated warm front in portions of the north-central U.S. Continued precipitation in these already saturate areas combined with rapid runoff will continue flood concerns from parts of North Dakota into northwestern Wisconsin.

Elsewhere, scattered showers and thunderstorms are expected in the Mid-Atlantic and southeastern corner of the nation as a weak upper trough of low pressure drops southward over the region. Locally heavy rain amounts of up to 2 inches may result in areas of minor flooding, especially in poor drainage areas. To the north, additional showers will be possible in the Northeast.
More News Articles

Reston Weather at a Glance

Updated 12:14 PM EDT
Elevation
390 ft
Report Station
You are about to report this weather station for bad data.

Please select the information which is incorrect and click 'Submit' otherwise click 'Cancel'.

— Cancel

Now
Overcast
Overcast
Temperature
71.3 °F
Feels Like 70 °F
Wind(mph)
0.0
Sunrise / Set
5:52 AM
8:19 PM
Moon
Waxing Gibbous
Today
Thunderstorm 82 °F
T-storms
40% chance of precipitation
Tonight
Chance of a Thunderstorm 66 °F
Chance of T-storms
30% chance of precipitation
Tomorrow
Partly Cloudy 86 | 70 °F
Partly Cloudy
Wednesday
Chance of a Thunderstorm 88 | 66 °F
Chance of T-storms
30% chance of precipitation
Thursday
Chance of a Thunderstorm 82 | 66 °F
Chance of T-storms
60% chance of precipitation
Friday
Chance of Rain 77 | 52 °F
Chance of Rain
40% chance of precipitation
Today is forecast to be Warmer than yesterday.
Conditions
Pressure
30.08 in
Visibility
10.0 miles
Clouds
Mostly Cloudy 1500 ft
Overcast 2000 ft
Moisture
Humidity
84%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KIAD 201552Z 21007KT 10SM BKN015 OVC020 22/19 A3008 RMK AO2 SLP184 T02220189
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Heat Index
70 °F
Dew Point
66 °F
Wind
Speed / Dir
Calm
Wind Gust
0.0 mph
Health
UV
3 out of 16
Pollen
6.80 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Sporadic
View Flu Map
Loading…
Source: BestForecast
Descriptive Forecast
Monday
tstorms Overcast with rain showers in the morning, then partly cloudy with thunderstorms and rain showers. Fog early. High of 82F. Winds from the South at 5 to 10 mph. Chance of rain 40%.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. Fog overnight. Low of 66F. Winds from the South at 5 to 10 mph. Chance of rain 30%.
Tuesday
partlycloudy Partly cloudy. Fog early. High of 86F. Winds from the SSW at 5 to 10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy with a chance of rain. Low of 70F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Wednesday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 88F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and rain. Low of 66F. Winds from the SSW at 10 to 15 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.
Thursday
chancetstorms Overcast with a chance of a thunderstorm and rain. High of 82F. Winds from the SSW at 5 to 10 mph. Chance of rain 60%.
Thursday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and rain. Low of 66F. Winds less than 5 mph. Chance of rain 40%.
Friday
chancerain Partly cloudy with a chance of rain. High of 77F. Winds from the North at 10 to 15 mph. Chance of rain 40%.
Friday Night
nt_mostlycloudy Mostly cloudy. Low of 52F. Winds from the North at 5 to 15 mph.
Saturday
partlycloudy Clear. High of 73F. Winds from the NNE at 5 to 10 mph.
Saturday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Sunday
mostlycloudy Mostly cloudy. High of 75F. Winds from the ESE at 5 to 10 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 57F. Winds from the SE at 5 to 10 mph.
Monday
chancerain Partly cloudy with a chance of rain. High of 73F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.
Monday Night
nt_mostlycloudy Mostly cloudy with a chance of a thunderstorm. Low of 59F. Winds from the SE at 5 to 10 mph. Chance of rain 20%.
Tuesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 79F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 61F. Winds less than 5 mph. Chance of rain 50%.
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 40%.
Thursday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.
Thursday Night
nt_partlycloudy Clear with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 20%.
Loading…
 
First Previous Last Next  
Updated:  
 
 

 

Weather Forecast for Reston VA

View Calendar 10-Day Forecast for station KVARESTO8

Monday, 20
Thunderstorm
82 | 66 °F
T-storms
Chance of
Precipitation
40%
Tuesday, 21
Partly Cloudy
86 | 70 °F
Partly Cloudy
Chance of
Precipitation
20%
Wednesday, 22
Chance of a Thunderstorm
88 | 66 °F
Chance of T-storms
Chance of
Precipitation
30%
Thursday, 23
Chance of a Thunderstorm
82 | 66 °F
Chance of T-storms
Chance of
Precipitation
60%
Friday, 24
Chance of Rain
77 | 52 °F
Chance of Rain
Chance of
Precipitation
40%
Saturday, 25
Partly Cloudy
73 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 26
Mostly Cloudy
75 | 57 °F
Mostly Cloudy
Chance of
Precipitation
0%
Monday, 27
Chance of Rain
73 | 59 °F
Chance of Rain
Chance of
Precipitation
40%
Tuesday, 28
Chance of a Thunderstorm
79 | 61 °F
Chance of T-storms
Chance of
Precipitation
40%
Wednesday, 29
Chance of a Thunderstorm
86 | 63 °F
Chance of T-storms
Chance of
Precipitation
40%
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Monday
tstorms Overcast with rain showers in the morning, then partly cloudy with thunderstorms and rain showers. Fog early. High of 82F. Winds from the South at 5 to 10 mph. Chance of rain 40%.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. Fog overnight. Low of 66F. Winds from the South at 5 to 10 mph. Chance of rain 30%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 63 75 | 65 78 | 66 71 | 65
Wind 3 mph SSE 5 mph South 7 mph South 4 mph SSW
Humidity 88% 72% 66% 85%
Chance of Precip. 10% 40% 40% 10%
Cloud Cover 100% 78% 68% 65%
Conditions Fog Rain Showers Thunderstorm Mostly Cloudy
Sunrise & Sunset
5:52 AM
8:19 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.90], Average RMSE [1.86]
The National Weather Service forecast quality is good. MaxT RMSE [2.16], Average RMSE [1.72] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Tuesday
partlycloudy Partly cloudy. Fog early. High of 86F. Winds from the SSW at 5 to 10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy with a chance of rain. Low of 70F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 64 78 | 66 83 | 66 75 | 66
Wind 3 mph SSW 5 mph SSW 9 mph SSW 9 mph SSW
Humidity 81% 67% 55% 74%
Chance of Precip. 10% 10% 10% 20%
Cloud Cover 54% 58% 56% 58%
Conditions Fog Partly Cloudy Partly Cloudy Chance of Rain
Sunrise & Sunset
5:51 AM
8:20 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.98], Average RMSE [2.39]
The National Weather Service forecast quality is fair. MaxT RMSE [2.79], Average RMSE [2.01] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Wednesday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 88F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and rain. Low of 66F. Winds from the SSW at 10 to 15 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 65 83 | 66 84 | 65 73 | 65
Wind 7 mph SSW 10 mph SSW 11 mph SSW 10 mph South
Humidity 81% 59% 55% 78%
Chance of Precip. 10% 10% 30% 20%
Cloud Cover 69% 69% 69% 40%
Conditions Mostly Cloudy Mostly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:51 AM
8:21 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.40], Average RMSE [2.38]
The National Weather Service forecast quality is fair. MaxT RMSE [3.04], Average RMSE [3.15] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Thursday
chancetstorms Overcast with a chance of a thunderstorm and rain. High of 82F. Winds from the SSW at 5 to 10 mph. Chance of rain 60%.
Thursday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and rain. Low of 66F. Winds less than 5 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 70 | 65 75 | 67 76 | 69 71 | 62
Wind 9 mph SSW 7 mph SW 5 mph SSW 4 mph SW
Humidity 85% 77% 75% 74%
Chance of Precip. 30% 20% 20% 30%
Cloud Cover 68% 66% 86% 40%
Conditions Chance of a Thunderstorm Chance of a Thunderstorm Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:50 AM
8:22 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.47], Average RMSE [2.30]
The National Weather Service forecast quality is fair. MaxT RMSE [3.47], Average RMSE [3.31] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Friday
chancerain Partly cloudy with a chance of rain. High of 77F. Winds from the North at 10 to 15 mph. Chance of rain 40%.
Friday Night
nt_mostlycloudy Mostly cloudy. Low of 52F. Winds from the North at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 60 70 | 63 69 | 58 59 | 41
Wind 6 mph NW 11 mph North 10 mph North 10 mph North
Humidity 80% 75% 70% 51%
Chance of Precip. 10% 10% 20% 10%
Cloud Cover 9% 49% 22% 86%
Conditions Clear Partly Cloudy Chance of Rain Mostly Cloudy
Sunrise & Sunset
5:49 AM
8:23 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.80], Average RMSE [2.89]
The National Weather Service forecast quality is poor. MaxT RMSE [3.73], Average RMSE [3.33] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Saturday
partlycloudy Clear. High of 73F. Winds from the NNE at 5 to 10 mph.
Saturday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 55 | 35 67 | 47 71 | 53 58 | 45
Wind 8 mph NNW 8 mph NNE 6 mph NE 3 mph ESE
Humidity 45% 46% 49% 62%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 42% 0% 0% 12%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
5:49 AM
8:24 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.71], Average RMSE [2.18]
The National Weather Service forecast quality is poor. MaxT RMSE [3.55], Average RMSE [3.09] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Sunday
mostlycloudy Mostly cloudy. High of 75F. Winds from the ESE at 5 to 10 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 57F. Winds from the SE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 55 | 45 65 | 54 73 | 56 64 | 51
Wind 2 mph NW 5 mph ESE 8 mph SE 7 mph SSE
Humidity 69% 63% 53% 65%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 25% 38% 80% 39%
Conditions Clear Partly Cloudy Mostly Cloudy Partly Cloudy
Sunrise & Sunset
5:48 AM
8:24 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.78], Average RMSE [3.51]
The National Weather Service forecast quality is fair. MaxT RMSE [3.14], Average RMSE [3.22] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Monday
chancerain Partly cloudy with a chance of rain. High of 73F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.
Monday Night
nt_mostlycloudy Mostly cloudy with a chance of a thunderstorm. Low of 59F. Winds from the SE at 5 to 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 51 67 | 55 71 | 56 61 | 57
Wind 3 mph SE 7 mph ESE 9 mph SE 6 mph SE
Humidity 75% 66% 58% 87%
Chance of Precip. 10% 20% 10% 0%
Cloud Cover 9% 96% 62% 73%
Conditions Clear Chance of Rain Partly Cloudy Mostly Cloudy
Sunrise & Sunset
5:47 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.34], Average RMSE [2.92]
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Tuesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 79F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 61F. Winds less than 5 mph. Chance of rain 50%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 60 | 59 68 | 62 72 | 63 73 | 64
Wind 5 mph SE 6 mph SSE 6 mph SSE 5 mph SE
Humidity 94% 76% 77% 73%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 84% 88% 85% 81%
Conditions Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
5:47 AM
8:26 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.15], Average RMSE [4.26]
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 64 | 63 74 | 66 76 | 68 72 | 66
Wind 4 mph SSE 4 mph South 4 mph South 3 mph South
Humidity 98% 75% 75% 82%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 76% 74% 74% 69%
Conditions Fog Mostly Cloudy Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
5:46 AM
8:27 PM
Source: BestForecast at 9:39 AM EDT on May 20, 2013
Descriptive Forecast
Thursday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.
Thursday Night
nt_partlycloudy Clear with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 65 76 | 67 79 | 71 67 | 67
Wind 2 mph South 3 mph South 4 mph South 4 mph South
Humidity 97% 73% 74% 100%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 58% 51% 46% %
Conditions Fog Partly Cloudy Partly Cloudy Fog
Sunrise & Sunset
Sun does not rise
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 20, 2013 Max Temp Min Temp
Normal (KIAD) 76 °F 52 °F
Record (KIAD) 93 °F (1996) 36 °F (2002)
Yesterday 74 °F 59 °F
Yesterday's Cooling Degree Days: 2
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
More information at USGS.gov
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
PM10
Yesterday Good
OZONE
Current Good
PM2.5
Current Good
OZONE
Monday Good
OZONE
Monday Good
PM2.5
Coastal Water Temperatures
Place Temperature
Washington, DC 66.0 °F
Baltimore, MD 66.9 °F
Solomons Island, MD 66.0 °F
Marine Forecast
Astronomy
May. 20, 2013 Rise Set
Actual Time 5:52 AM EDT 8:19 PM EDT
Civil Twilight 5:21 AM EDT 8:50 PM EDT
Nautical Twilight 4:44 AM EDT 9:28 PM EDT
Astronomical Twilight 4:02 AM EDT 10:10 PM EDT
Moon 3:27 PM EDT 2:43 AM EDT
Length Of Visible Light 15h 28m
Length of Day
14h 27m
Tomorrow will be 1m 35s longer.
Waxing Gibbous, 75% of the Moon is Illuminated
Today
Waxing Gibbous
May 25
Full
May 31
Last Quarter
Jun 8
New
Jun 16
First Quarter
Visit Astronomy
Today's Extremes
State Highs State Lows
80 °F
Suffolk
78 °F
Newport News
78 °F
Melfa
78 °F
Oceana NAS
78 °F
Chesapeake
57 °F
Hot Springs
57 °F
Dublin
59 °F
Wise
59 °F
Richlands
59 °F
Winchester
Record Extremes
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
Follow us on Twitter Find us on Facebook Community
WunderPhotos®
Roaring creek
two types
• • • • • • • • • •
Uploaded by: myvalleylil
1,613,262 photos uploaded!
Upload a photo now
Visit WunderPhotos
WunderBlogs®
Gifts From My Garden
By Proserpina 1 hour ago
Visit WunderBlogs
Travel & Activities
Travel Planning
Travel Planner Road Trip Planner
Destination? *
When are you going?
to
Is there an activity you would like to explore?
* Required field
View all Travel Tools
Aviation
City Temp. Conditions Updated
Dulles Airport 72 °F Overcast 11:52 AM EDT
Leesburg 73 °F Overcast 11:55 AM EDT
Gaithersburg 72 °F Overcast 11:55 AM EDT
Washington 73 °F Overcast 11:52 AM EDT
View all Aviation Tools
Flight To ETA Status
AWI3648
Columbia, SC 		KDCA 12:06PM On Time
DAL1744
Detroit, MI 		KDCA 12:07PM On Time
RPA3384
Pittsburgh, PA 		KDCA 12:08PM On Time
AWI4054
Charleston, SC 		KDCA 12:13PM On Time
UAL947
Amsterdam 		KIAD 12:07PM En Route / Delayed
POE723
Toronto, Ontario 		KIAD 12:19PM On Time
ASQ5753
Norfolk, VA 		KIAD 12:24PM On Time
BAW217
London, England 		KIAD 12:26PM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: MVFR (KIAD)
Wind Speed: 7.0 kts.
Wind Dir: 195° (SSW)
Ceiling: 1500 ft

METAR KIAD 201552Z 21007KT 10SM BKN015 OVC020 22/19 A3008 RMK AO2 SLP184 T02220189

View all Reports & Maps
Nearby Events
Event Date Forecast
Jason Masi 9:00 PM EDT
2013-04-16		 Chance of Rain, 69°F
Acoustic Tuesday 9:00 PM EDT
2013-04-16		 Chance of Rain, 69°F
Ringling Bros. and Barnum & Bailey: Dragons 7:00 PM EDT
2013-04-18		 Chance of a Thunderstorm, 73°F
Bobby Long 8:00 PM EDT
2013-04-18		 Mostly Cloudy, 70°F
Ringling Bros. and Barnum & Bailey: Dragons 7:00 PM EDT
2013-04-19		 Thunderstorm, 65°F
Ringling Bros. and Barnum & Bailey: Dragons 1:00 PM EDT
2013-04-19		 Overcast, 73°F
Event data courtesy eviesays.com
Sports
Event Date Forecast
Mariners vs. Indians 12:05 PM EDT on May 20, 2013 Chance of Rain, 76 °F
Rays vs. Blue Jays 1:07 PM EDT on May 20, 2013 Scattered Clouds, High 69° F/ 21° C
Phillies vs. Nationals 7:05 PM EDT on May 24, 2013 Clear, 68 °F
Phillies vs. Nationals 7:15 PM EDT on May 25, 2013 Partly Cloudy, 65 °F
Event Date Forecast
Murcia vs. Guadalajara 3:00 PM EDT on May 20, 2013 Forecast not available.
Betis vs. Mallorca 10:00 PM CEST on May 20, 2013 Partly Cloudy, High 71° F/ 22° C
Portland vs. D.C. 7:00 PM EDT on May 25, 2013 Partly Cloudy, 65 °F
Toronto FC vs. D.C. 7:00 PM EDT on June 15, 2013 Average High 85° F/ 29° C
Event Date Forecast
Coca-Cola 600 6:16 PM EDT on May 26, 2013 Partly Cloudy, 70 °F
FedEx 400 benefiting Autism Speaks 1:15 PM EDT on June 02, 2013 Average High 81° F/ 27° C
Event Date Forecast
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 23, 2013 Partly Cloudy, 70 °F
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 24, 2013 Partly Cloudy, 70 °F
AT&T National 8:30 AM EDT on June 27, 2013 Average High 87° F/ 30° C
AT&T National 8:30 AM EDT on June 28, 2013 Average High 86° F/ 29° C
View all Sports Weather
Videos
Year In Weather 2012

Watch the nearly year-long satellite animation as Weather Underground calls out the most significant weather events of the past year, including Superstorm Sandy and Hurricane Isaac.

Visit Our Video Section
Weather Stations
Station Location Temp. Heat Index Dew Point Humidity Wind Precipitation Elevation Updated Type Website
Golf Course Island, Reston, VA 71.3 °F 70 °F 66 °F 84% SSW  at  0.0 mph 0.00 in / hr 390 ft 12:14 PM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 71 °F - 67 °F 86% SE  at  2 mph 0.00 in / hr 400 ft 11:35 AM EDT MADIS
Cedar Cove Cluster, Reston, VA 72.3 °F 71 °F 67 °F 84% South  at  0.0 mph 0.00 in / hr 350 ft 12:14 PM EDT Rapid Fire  
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 72.1 °F 71 °F 67 °F 85% SW  at  0.0 mph 0.00 in / hr 295 ft 12:10 PM EDT Normal  
Lake Fairfax, Vienna, VA 72.7 °F 72 °F 68 °F 84% WNW  at  3.0 mph 0.00 in / hr 275 ft 12:14 PM EDT Rapid Fire
APRSWXNET Reston VA , Herndon, VA 70 °F - 66 °F 88% SSW  at  0 mph 0.00 in / hr 454 ft 11:48 AM EDT MADIS
Hawk Ridge Subdivision, Reston, VA 71.3 °F 70 °F 66 °F 84% North  at  0.0 mph 0.00 in / hr 300 ft 12:10 PM EDT Normal
Shaker Woods, Herndon, VA 73.0 °F 73 °F 67 °F 82% SW  at  3.8 mph 0.00 in / hr 387 ft 12:14 PM EDT Rapid Fire  
Falls Brook, Herndon, VA 72.7 °F 72 °F 68 °F 85% SW  at  0.0 mph 0.00 in / hr 280 ft 12:07 PM EDT Normal  
Fox Mill, Herndon, VA 72.7 °F 77 °F 43 °F 34% NW  at  0.0 mph 0.00 in / hr 383 ft 12:13 PM EDT Rapid Fire  
Folkstone, Oak Hill, VA 71.0 °F - 69 °F 93% WNW  at  0.0 mph 0.01 in / hr 375 ft 12:14 PM EDT Rapid Fire  
VADOT Site_G, Herndon, VA 71 °F 72 °F 65 °F 80% SSE  at  7 mph 0.00 in / hr 339 ft 11:34 AM EDT MADIS
APRSWXNET Great Falls VA , Great Falls, VA 70 °F - 65 °F 84% SSW  at  2 mph 0.00 in / hr 380 ft 11:40 AM EDT MADIS
Great Falls VA, Great Falls, VA 71.6 °F 71 °F 66 °F 83% South  at  0.0 mph - / hr 380 ft 12:11 PM EDT Normal
Chantilly Highlands, Herndon, VA 74.5 °F 74 °F 70 °F 87% SE  at  2.2 mph 0.00 in / hr 340 ft 12:14 PM EDT Rapid Fire  
VADOT Site_C, Oakton, VA 73 °F 74 °F 66 °F 78% North  at  - 0.00 in / hr 290 ft 11:37 AM EDT MADIS
Trott Ave, Vienna, VA 72.8 °F 71 °F 70 °F 89% SSE  at  0.0 mph - / hr 415 ft 12:06 PM EDT Normal  
APRSWXNET Great Falls V, Great Falls, VA 72 °F 72 °F 66 °F 82% SW  at  0 mph 0.00 in / hr 296 ft 11:40 AM EDT MADIS
Wolf Trap Woods, Vienna, VA 71.9 °F - 69 °F 90% SSW  at  0.0 mph 0.00 in / hr 0 ft 12:00 PM EDT Normal  
VADOT Site_E, Oakton, VA 74 °F 73 °F 69 °F 85% North  at  - 0.00 in / hr 353 ft 11:40 AM EDT MADIS
Beulah-Wolf Trap, Vienna, VA 72.7 °F 72 °F 68 °F 85% ESE  at  0.0 mph 0.00 in / hr 430 ft 12:09 PM EDT Normal  
NE Vienna, Vienna, VA 72.7 °F 72 °F 68 °F 85% ESE  at  0.0 mph - / hr 417 ft 12:12 PM EDT Normal  
APRSWXNET Great Falls VA , Sterling, VA 70 °F - 67 °F 91% ENE  at  0 mph 0.00 in / hr 321 ft 11:41 AM EDT MADIS
Vienna Woods, Vienna, VA 74.1 °F 74 °F 69 °F 83% West  at  1.1 mph - / hr 361 ft 12:04 PM EDT Normal  
Rosehaven Estates, Fairfax, VA 74.2 °F 73 °F 71 °F 89% South  at  0.0 mph 20.35 in / hr 470 ft 12:00 PM EDT Normal  
NonFedAWOS WASHINGTON DULLES , Dulles, VA 72 °F 72 °F 66 °F 82% SSW  at  8 mph 0.00 in / hr 1023 ft 11:52 AM EDT MADIS
Cobbdale, Fairfax, VA 71.6 °F 71 °F 66 °F 82% ESE  at  3.0 mph - / hr 394 ft 12:02 PM EDT Normal  
Villa D'este, Fairfax, VA 72.9 °F 72 °F 68 °F 85% WNW  at  1.0 mph 0.00 in / hr 354 ft 12:10 PM EDT Normal  
Wind Power Cube, Chantilly, VA 75.0 °F 75 °F 69 °F 81% SW  at  6.0 mph 0.00 in / hr 203 ft 12:14 PM EDT Normal  
Weatherscience.net, Potomac Falls, VA 75.9 °F 77 °F 69 °F 80% NE  at  2.3 mph 0.00 in / hr 276 ft 12:14 PM EDT Rapid Fire
Ridings at Blue Springs, Chantilly, VA 72.3 °F 71 °F 68 °F 87% South  at  0.0 mph 0.00 in / hr 303 ft 12:11 PM EDT Normal
Pine Ridge, Fairfax, VA 73.9 °F 75 °F 66 °F 77% East  at  0.7 mph 0.00 in / hr 348 ft 12:00 PM EDT Normal  
Dustoff, Falls Church, VA 71.1 °F - 66 °F 85% North  at  0.0 mph 0.00 in / hr 427 ft 11:59 AM EDT Normal  
Would you like to share your weather data with the rest of the world? Add Your Weather Station!