Fontana, CA

4:03 AM PDT on May 18, 2013 (GMT -0700)
Elev: 1309 ft
Lon: 117.4° W
Lat: 34.1° N
Source
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News
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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.
Record Snow Ahead: Where Winter Won't End
May 17, 2013
Spring warmth has arrived in most of the U.S., except this state.
Storm Damage near Shreveport
May 16, 2013
Storm storms leave damage near Shreveport, Louisiana. See photos and tweets.
Texas Tornadoes: As They Happened
May 17, 2013
We walk through the full timeline of the Texas tornadoes on May 15, 2013.
By Man or Nature, Places That Will Never Be the Same
May 16, 2013
Where Earth has been changed forever.
Smaller Glaciers Boost Sea Level as Much as the Giants
May 16, 2013
Thousands of small glaciers, unconnected to continental-scale ice sheets, have dumped about 260 million tons of meltwater into the ocean annually between 2003 and 2009.
Deadly Texas Outbreak May Mark End of Tornado Drought
May 16, 2013
After months with record-low activity, the 2013 tornado season roared back with a vengeance on Wednesday as at least 10 twisters touched down across portions of north-central Texas, killing at least 6 and injuring dozens more.
Mexico Volcano Registers More Seismic Activity
May 16, 2013
Seismic activity is continuing at the Popocatepetl volcano near Mexico City and authorities say they have readied shelters and identified evacuation routes in case they should be needed.
Cyclone Mahasen Weakens After Killing 45 in Bangladesh
May 16, 2013
Cyclone Mahasan weakened Thursday afternoon into a tropical storm and then dissipated, causing far less damage than had been feared as it passed over Bangladesh and spared Myanmar almost entirely, meteorological officials said.
Worldwide Cleanup Reveals Trashed Beaches (PHOTOS)
May 17, 2013
The Ocean Conservancy releases stunning photos from its recent international beach cleanup day.
Oldest Water on Earth Found Deep Underground
May 17, 2013
Finding the oldest water on Earth has implications for understanding life on Earth and maybe Mars.
Texas Residents Missing after Tornadoes Found Safe
May 17, 2013
Deadly storms ripped across north-central Texas on Wednesday, leaving a wide trail of destruction.
Study: 97% Agreement on Manmade Global Warming
May 16, 2013
The scientific agreement that climate change is happening, and that it's caused by human activity, is significant and growing, according to a new study published Thursday.
Social Media Reacts as Deadly Severe Weather Pelts Texas
May 16, 2013
Severe weather broke out in northeastern Texas, including the Dallas Fort Worth area. Below are reports of hail and tornadoes from throughout social media.
Kepler's Alien-Hunting Days May be Numbered
May 15, 2013
NASA's planet-hunting Kepler telescope is broken, possibly jeopardizing searches for life outside the Milky Way.
Report: Coldest April in Over a Decade for U.S.
May 15, 2013
April 2013 was colder and wetter than average.
Stunning Images of Earth at Night (PHOTOS)
May 15, 2013
The collection above features over 100 breathtaking images of Earth taken from NASA satellites and the International Space Station at night. But to scientists and meteorologists, they are more than just pretty pictures.
America's First Climate Refugees: Is Exile Inevitable?
May 15, 2013
In Alaska, climate change is forcing villagers on the edge of the Arctic to confront the reality of a warming planet. If they don't act soon, their villages were be lost forever.
Wisconsin Wildfire Started by Logging Operations
May 17, 2013
The cause of a large wildfire in Wisconsin has been solved.
More News Articles
Weather Summary
Kari Kiefer
Weather Underground Forecast for Saturday, May 18, 2013.

A strong low pressure system will bring active weather to the center of the nation on Saturday. The system will move off the Rockies and into the Plains, which will push a warm front into the Northern Plains and Upper Midwest, while it continues pulling a cold front southeastward across the Western states. Counter clockwise flow around this system will pull more moisture and energy into the Plains from the Gulf of Mexico, allowing for showers and thunderstorms to develop from Oklahoma through the Dakotas and into Minnesota. These areas are under a slight threat of severe weather development with strong winds, large hail, and heavy rainfall. Parts of western Nebraska and northwestern Kansas are under a moderate risk of severe thunderstorm development. This area has increased risk for tornado development on Saturday.

East of this activity, a weak trough slowly moves over the Eastern Valleys, allowing for a few more widespread showers and thunderstorms to pop up from the Southern Appalachians through the Mid-Atlantic states. Meanwhile in the West, moisture from the Pacific Ocean will allow for scattered showers with afternoon thunderstorms to persist for the Northern and Central Rockies. Severe storms are not likely in these areas. In the Southwest, gusty winds, warm temperatures, and dry conditions will maintain dangerous fire weather conditions on Saturday.
Weather Underground Forecast for Saturday, May 18, 2013.

A strong low pressure system will bring active weather to the center of the nation on Saturday. The system will move off the Rockies and into the Plains, which will push a warm front into the Northern Plains and Upper Midwest, while it continues pulling a cold front southeastward across the Western states. Counter clockwise flow around this system will pull more moisture and energy into the Plains from the Gulf of Mexico, allowing for showers and thunderstorms to develop from Oklahoma through the Dakotas and into Minnesota. These areas are under a slight threat of severe weather development with strong winds, large hail, and heavy rainfall. Parts of western Nebraska and northwestern Kansas are under a moderate risk of severe thunderstorm development. This area has increased risk for tornado development on Saturday.

East of this activity, a weak trough slowly moves over the Eastern Valleys, allowing for a few more widespread showers and thunderstorms to pop up from the Southern Appalachians through the Mid-Atlantic states. Meanwhile in the West, moisture from the Pacific Ocean will allow for scattered showers with afternoon thunderstorms to persist for the Northern and Central Rockies. Severe storms are not likely in these areas. In the Southwest, gusty winds, warm temperatures, and dry conditions will maintain dangerous fire weather conditions on Saturday.
More News Articles

Fontana Weather at a Glance

Updated 4:02 AM PDT
Elevation
1465 ft
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Now
Overcast
Overcast
Temperature
56.5 °F
Feels Like 56.5 °F
Wind(mph)
6.0
Sunrise / Set
5:45 AM
7:47 PM
Moon
First Quarter
Today
Fog 84 °F
Fog
Tonight
Partly Cloudy 55 °F
Partly Cloudy
Tomorrow
Partly Cloudy 86 | 59 °F
Partly Cloudy
Monday
Clear 93 | 61 °F
Clear
Tuesday
Partly Cloudy 90 | 59 °F
Partly Cloudy
Wednesday
Partly Cloudy 88 | 57 °F
Partly Cloudy
Today is forecast to be Warmer than yesterday.
Conditions
Pressure
29.96 in
Visibility
10.0 miles
Clouds
Mostly Cloudy 1700 ft
Overcast 3800 ft
Moisture
Humidity
86%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KONT 181053Z 27004KT 10SM BKN017 OVC038 16/12 A2998 RMK AO2 SLP146 T01560117 $
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Weather Radio
Launch Weather Radio
Temperature
Temperature
56.5 °F
70,70,70,68,67,64,62,61,61,61,61,61,60
Dew Point
52 °F
Wind
Speed / Dir
6.0 mph from West
Wind Gust
6.0 mph
Health
UV
0 out of 16
Pollen
5.20 out of 12
Pollen Forecast
Ozone
Good
Flu Activity
Sporadic
View Flu Map
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Source: BestForecast
Descriptive Forecast
Saturday
partlycloudy Clear. Fog early. High of 84F. Winds from the SW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Clear. Fog overnight. Low of 55F. Winds less than 5 mph.
Sunday
partlycloudy Clear. Fog early. High of 86F. Winds from the SW at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 59F. Winds from the SW at 5 to 15 mph.
Monday
clear Clear. High of 93F. Winds from the WNW at 10 to 15 mph.
Monday Night
nt_clear Clear in the evening, then partly cloudy. Low of 61F. Winds less than 5 mph.
Tuesday
partlycloudy Clear in the morning, then mostly cloudy. High of 90F. Winds from the SSW at 5 to 15 mph.
Tuesday Night
nt_clear Clear in the evening, then partly cloudy. Low of 59F. Winds less than 5 mph.
Wednesday
partlycloudy Clear in the morning, then partly cloudy. High of 88F. Winds from the SSW at 5 to 15 mph.
Wednesday Night
nt_clear Clear. Low of 57F. Winds less than 5 mph.
Thursday
clear Clear. High of 90F. Winds from the SW at 5 to 15 mph.
Thursday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Friday
clear Clear. High of 86F. Winds from the SSW at 5 to 15 mph.
Friday Night
nt_clear Clear. Low of 54F. Winds less than 5 mph.
Saturday
clear Clear. High of 79F. Winds from the SW at 5 to 15 mph.
Saturday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Sunday
clear Clear. High of 86F. Winds from the WSW at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Monday
clear Clear. High of 90F. Winds from the WSW at 5 to 15 mph.
Monday Night
nt_clear Clear. Low of 55F. Winds less than 5 mph.
Tuesday
clear Clear. High of 90F. Winds from the WSW at 5 to 10 mph.
Tuesday Night
nt_clear Clear. Low of 55F. Winds less than 5 mph.
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Weather Forecast for Fontana CA

View Calendar 10-Day Forecast for station KCARIALT4

Saturday, 18
Fog
84 | 55 °F
Fog
Chance of
Precipitation
10%
Sunday, 19
Partly Cloudy
86 | 59 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 20
Clear
93 | 61 °F
Clear
Chance of
Precipitation
0%
Tuesday, 21
Partly Cloudy
90 | 59 °F
Partly Cloudy
Chance of
Precipitation
0%
Wednesday, 22
Partly Cloudy
88 | 57 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 23
Clear
90 | 52 °F
Clear
Chance of
Precipitation
0%
Friday, 24
Clear
86 | 54 °F
Clear
Chance of
Precipitation
0%
Saturday, 25
Clear
79 | 54 °F
Clear
Chance of
Precipitation
0%
Sunday, 26
Clear
86 | 54 °F
Clear
Chance of
Precipitation
0%
Monday, 27
Clear
90 | 55 °F
Clear
Chance of
Precipitation
0%
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Saturday
partlycloudy Clear. Fog early. High of 84F. Winds from the SW at 5 to 15 mph.
Saturday Night
nt_partlycloudy Clear. Fog overnight. Low of 55F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 53 75 | 49 77 | 50 62 | 50
Wind 3 mph ESE 8 mph SW 12 mph SW 3 mph WSW
Humidity 90% 40% 38% 67%
Chance of Precip. 0% 10% 10% 0%
Cloud Cover 76% 16% 2% 3%
Conditions Fog Clear Clear Fog
Sunrise & Sunset
5:45 AM
7:47 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.62], Average RMSE [1.75]
The National Weather Service forecast quality is fair. MaxT RMSE [3.01], Average RMSE [1.85] : Use NWS
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Sunday
partlycloudy Clear. Fog early. High of 86F. Winds from the SW at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 59F. Winds from the SW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 59 | 51 81 | 45 78 | 46 63 | 46
Wind 2 mph SW 9 mph SW 11 mph WSW 4 mph SW
Humidity 72% 29% 32% 53%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 85% 0% 0% 5%
Conditions Fog Clear Clear Clear
Sunrise & Sunset
5:45 AM
7:47 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.54], Average RMSE [2.08]
The National Weather Service forecast quality is fair. MaxT RMSE [3.14], Average RMSE [2.13] : Use NWS
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Monday
clear Clear. High of 93F. Winds from the WNW at 10 to 15 mph.
Monday Night
nt_clear Clear in the evening, then partly cloudy. Low of 61F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 62 | 46 90 | 41 86 | 36 66 | 29
Wind 6 mph WSW 11 mph North 9 mph WSW 2 mph NE
Humidity 55% 16% 16% 24%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 2% 5% 5% 13%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:44 AM
7:48 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.05], Average RMSE [2.04]
The National Weather Service forecast quality is poor. MaxT RMSE [3.55], Average RMSE [2.29] : Use NWS
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Tuesday
partlycloudy Clear in the morning, then mostly cloudy. High of 90F. Winds from the SSW at 5 to 15 mph.
Tuesday Night
nt_clear Clear in the evening, then partly cloudy. Low of 59F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 24 86 | 24 80 | 34 65 | 38
Wind 2 mph NE 9 mph SW 11 mph SW 4 mph South
Humidity 21% 9% 19% 36%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 46% 0%
Conditions Clear Clear Partly Cloudy Clear
Sunrise & Sunset
5:43 AM
7:49 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.86], Average RMSE [2.31]
The National Weather Service forecast quality is poor. MaxT RMSE [4.03], Average RMSE [1.92] : Use NWS
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Wednesday
partlycloudy Clear in the morning, then partly cloudy. High of 88F. Winds from the SSW at 5 to 15 mph.
Wednesday Night
nt_clear Clear. Low of 57F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 61 | 36 77 | 35 75 | 41 60 | 46
Wind 3 mph South 11 mph SW 10 mph SW 3 mph South
Humidity 39% 21% 30% 58%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 38% 2% 23% 0%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
5:43 AM
7:49 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.74], Average RMSE [2.02]
The National Weather Service forecast quality is poor. MaxT RMSE [4.54], Average RMSE [2.44] : Use NWS
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Thursday
clear Clear. High of 90F. Winds from the SW at 5 to 15 mph.
Thursday Night
nt_clear Clear. Low of 52F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 42 77 | 38 78 | 44 58 | 47
Wind 3 mph South 10 mph SW 10 mph SW 3 mph South
Humidity 53% 25% 30% 65%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 11% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:42 AM
7:50 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.14], Average RMSE [2.39]
The National Weather Service forecast quality is poor. MaxT RMSE [5.53], Average RMSE [2.73] : Use NWS
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Friday
clear Clear. High of 86F. Winds from the SSW at 5 to 15 mph.
Friday Night
nt_clear Clear. Low of 54F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 42 79 | 37 73 | 41 56 | 44
Wind 3 mph South 11 mph SSW 10 mph SSW 4 mph SSW
Humidity 58% 21% 32% 64%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 5% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:42 AM
7:51 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.76], Average RMSE [2.68]
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Saturday
clear Clear. High of 79F. Winds from the SW at 5 to 15 mph.
Saturday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 40 61 | 36 70 | 39 57 | 42
Wind 3 mph South 11 mph SW 11 mph SW 4 mph WSW
Humidity 55% 39% 33% 56%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 1% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:41 AM
7:51 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.86], Average RMSE [2.73]
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Sunday
clear Clear. High of 86F. Winds from the WSW at 5 to 15 mph.
Sunday Night
nt_clear Clear. Low of 54F. Winds from the WSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 56 | 44 79 | 40 77 | 37 60 | 42
Wind 2 mph West 4 mph SW 10 mph WSW 4 mph WSW
Humidity 62% 23% 23% 52%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 0%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:41 AM
7:52 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.67], Average RMSE [2.53]
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Monday
clear Clear. High of 90F. Winds from the WSW at 5 to 15 mph.
Monday Night
nt_clear Clear. Low of 55F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 59 | 46 82 | 43 77 | 42 60 | 45
Wind 2 mph West 4 mph WSW 10 mph WSW 4 mph WSW
Humidity 64% 25% 27% 58%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 1% 1% 1% 3%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:40 AM
7:53 PM
Source: BestForecast at 1:06 AM PDT on May 18, 2013
Descriptive Forecast
Tuesday
clear Clear. High of 90F. Winds from the WSW at 5 to 10 mph.
Tuesday Night
nt_clear Clear. Low of 55F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 49 83 | 47 79 | 47 62 | 49
Wind 2 mph West 3 mph SW 9 mph WSW 4 mph WSW
Humidity 71% 28% 32% 63%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 5% 8% 11% %
Conditions Clear Clear Clear Clear
Sunrise & Sunset
Sun does not rise
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 18, 2013 Max Temp Min Temp
Normal (KONT) 79 °F 56 °F
Record (KONT) 101 °F (2008) 49 °F (2011)
Yesterday 72 °F 60 °F
Yesterday's Cooling Degree Days: 1
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
OZONE
Current Good
OZONE
Sunday Good
PM10
Sunday Good
OZONE
Sunday Good
CO
Sunday Good
NO2
Astronomy
May. 18, 2013 Rise Set
Actual Time 5:45 AM PDT 7:47 PM PDT
Civil Twilight 5:17 AM PDT 8:14 PM PDT
Nautical Twilight 4:43 AM PDT 8:49 PM PDT
Astronomical Twilight 4:07 AM PDT 9:25 PM PDT
Moon 1:12 PM PDT 1:21 AM PDT
Length Of Visible Light 14h 57m
Length of Day
14h 01m
Tomorrow will be 1m 22s longer.
First Quarter, 53% of the Moon is Illuminated
Today
First Quarter
May 24
Full
May 31
Last Quarter
Jun 8
New
Jun 16
First Quarter
Visit Astronomy
Today's Extremes
State Highs State Lows
78 °F
Needles
73 °F
Palm Springs
73 °F
Thermal
72 °F
Blythe
71 °F
El Centro
26 °F
Truckee-Tahoe
30 °F
South Lake Tahoe
33 °F
Big Bear City
37 °F
Mount Shasta
39 °F
Weaverville
Record Extremes
Snow Depth
Station Depth Elevation
Leavitt Lake 66 in 9400 ft
Leavitt Meadows 2 in 7200 ft
Sonora Pass 0 in 8800 ft
Summit Meadow 1 in 9122 ft
Ebbetts Pass 0 in 8700 ft
Snow Depth Reports — Snow Depth Map
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Aviation
City Temp. Conditions Updated
Ontario 60 °F Overcast 3:53 AM PDT
Riverside 61 °F Overcast 3:53 AM PDT
San Bernardino This station is not reporting.
Chino 60 °F Overcast 3:53 AM PDT
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Flight To ETA Status
FDX810
Honolulu, HI 		KONT 04:30AM On Time
FDX1438
Memphis, TN 		KONT 05:04AM On Time
UPS908
Louisville, KY 		KONT 05:07AM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: MVFR (KONT)
Wind Speed: 4.0 kts.
Wind Dir: 270° (West)
Ceiling: 1700 ft

METAR KONT 181053Z 27004KT 10SM BKN017 OVC038 16/12 A2998 RMK AO2 SLP146 T01560117 $

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Nearby Events
Event Date Forecast
No events within 10 mi of location. View all events.
Event data courtesy eviesays.com
Sports
Event Date Forecast
Mariners vs. Indians 1:05 PM EDT on May 18, 2013 Chance of a Thunderstorm, 72 °F
Blue Jays vs. Yankees 1:05 PM EDT on May 18, 2013 Partly Cloudy, 70 °F
Event Date Forecast
Elche vs. Almería 12:00 PM CEST on May 18, 2013 Clear, High 68° F/ 20° C
Mirandés vs. Hércules 12:00 PM CEST on May 18, 2013 Clear, High 69° F/ 21° C
Event Date Forecast
Sprint Showdown 7:46 PM EDT on May 18, 2013 Thunderstorm, 74 °F
NASCAR Sprint All-Star Race 9:00 PM EDT on May 18, 2013 Thunderstorm, 74 °F
Event Date Forecast
HP Byron Nelson Championship 8:30 AM CDT on May 18, 2013 Mostly Cloudy, 72 °F
HP Byron Nelson Championship 8:30 AM CDT on May 19, 2013 Partly Cloudy, 72 °F
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Videos
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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.

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Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
rialto airport, Rialto, CA 56.5 °F - 52 °F 86% West  at  6.0 mph 0.00 in / hr 1465 ft 4:02 AM PDT Rapid Fire  
Citrus Heights, Fontana, CA 57.7 °F - 49 °F 73% North  at  0.0 mph 0.00 in / hr 1550 ft 4:02 AM PDT Normal  
Cat Crossing Ink, Rialto, CA 57.0 °F - 51 °F 80% WNW  at  0.1 mph 0.00 in / hr 1125 ft 4:02 AM PDT Rapid Fire
Southwest Fontana, Fontana, CA 59.8 °F - 51 °F 72% West  at  2.0 mph 0.00 in / hr 994 ft 4:02 AM PDT Rapid Fire  
Werner Ent. Fontana, Fontana, CA 59.4 °F - 54 °F 81% NW  at  3.0 mph 0.00 in / hr 1012 ft 4:02 AM PDT Rapid Fire  
Etiwanda, Rancho Cucamonga, CA 57.2 °F - 54 °F 88% WNW  at  0.0 mph - / hr 1404 ft 3:55 AM PDT Normal  
Wilson/Banyon, Rancho Cucamonga, CA 56.8 °F - 56 °F 98% SW  at  1.1 mph - / hr 1555 ft 3:54 AM PDT Normal  
210/15 fwys, Rancho Cucamonga, CA 53.6 °F - 51 °F 90% NW  at  1.0 mph 0.00 in / hr 1650 ft 4:03 AM PDT Rapid Fire  
Arrow/Etiwanda, Rancho Cucamonga, CA 60.1 °F - 49 °F 67% NW  at  8.1 mph 0.00 in / hr 1152 ft 4:03 AM PDT Rapid Fire  
MesoWest BENCH , San Bernardino, CA 59 °F - - - North  at  - 0.00 in / hr 1312 ft 1:40 AM PDT MADIS
MesoWest VNAVST , Guasti, CA 65 °F - - - North  at  - 0.00 in / hr 994 ft 2:55 AM PDT MADIS
Milliken/Mountain View, Rancho Cucamonga, CA 57.6 °F - 53 °F 85% WSW  at  3.0 mph 0.00 in / hr 1295 ft 4:00 AM PDT Normal  
MesoWest San Bernardino , San Bernardino, CA 61 °F - 54 °F 78% WSW  at  4 mph 0.00 in / hr 1049 ft 2:49 AM PDT MADIS
MesoWest Jurupa Valley , Riverside, CA 59 °F - 55 °F 87% North  at  0 mph 0.00 in / hr 794 ft 2:49 AM PDT MADIS
RAWS DEVORE CA, San Bernardino, CA 56 °F - 52 °F 87% SSW  at  3 mph 0.00 in / hr 2081 ft 3:10 AM PDT MADIS
MesoWest San Bernardino-CSU , San Bernardino, CA 60 °F - 53 °F 78% North  at  0 mph 0.00 in / hr 1520 ft 2:55 AM PDT MADIS
Haven and Banyan, Rancho Cucamonga, CA 55.6 °F - 54 °F 95% East  at  0.7 mph 0.00 in / hr 1617 ft 4:02 AM PDT Rapid Fire  
North San Bernardino, San Bernardino, CA 59.8 °F - 52 °F 76% SSW  at  0.0 mph 0.00 in / hr 1278 ft 4:02 AM PDT Rapid Fire
Highgrove, Ca, Riverside, CA 63.7 °F - 54 °F 72% SSW  at  1.1 mph 0.00 in / hr 1129 ft 4:02 AM PDT Rapid Fire  
Amethyst at Manzanita, Alta Loma, CA 54.9 °F - 52 °F 92% West  at  0.0 mph 0.00 in / hr 1775 ft 4:03 AM PDT Rapid Fire  
Loma Linda RF, Loma Linda, CA 60.1 °F - 53 °F 76% SW  at  1.7 mph 0.00 in / hr 1160 ft 3:59 AM PDT Normal  
Pennhill Estates, Upland, CA 56.2 °F - 53 °F 88% NW  at  0.0 mph 0.00 in / hr 1539 ft 3:59 AM PDT Normal  
WR6G Magnolia Center, Riverside, CA 58.6 °F - 53 °F 82% ENE  at  0.0 mph 0.00 in / hr 820 ft 4:03 AM PDT Normal  
La Sierra / Country View Estates, Riverside, CA 60.2 °F - 56 °F 86% NNE  at  0.0 mph 0.00 in / hr 856 ft 3:55 AM PDT Normal  
APRSWXNET Rancho Cucamonga CA , Upland, CA 54 °F - 52 °F 93% SW  at  0 mph 0.00 in / hr 1959 ft 3:49 AM PDT MADIS
Weather in, Eastvale, CA 61.4 °F - 53 °F 75% WNW  at  0.9 mph 0.00 in / hr 643 ft 4:02 AM PDT Rapid Fire  
MesoWest ONTARO , Chino, CA 59 °F - - - North  at  - 0.00 in / hr 979 ft 3:05 AM PDT MADIS
MesoWest Riverside Presidential Park , Riverside, CA 60 °F - 55 °F 83% West  at  2 mph 0.00 in / hr 879 ft 2:49 AM PDT MADIS
MesoWest KENBRK , Lytle Creek, CA 55 °F - - - North  at  - 0.00 in / hr 2603 ft 2:25 AM PDT MADIS
RAWS LYTLE CREEK CA, Lytle Creek, CA 54 °F - 54 °F 100% NW  at  0 mph 0.00 in / hr 2791 ft 3:15 AM PDT MADIS
MesoWest Crestline Ridge , Cedarpines Park, CA 44 °F 44 °F 43 °F 98% WSW  at  3 mph 0.00 in / hr 5299 ft 2:44 AM PDT MADIS
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