Dulles, VA

4:46 AM EST on December 07, 2016 (GMT -0500)
Washington Dulles International

Weather History for KIAD - August, 2013

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Friday, August 16, 2013

  Actual Average Record
Temperature  
Mean Temperature 66 °F 76 °F  
Max Temperature 78 °F 87 °F 100 °F (1997)
Min Temperature 53 °F 65 °F 46 °F (1979)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 June heating degree days 0 15  
Since 1 July heating degree days 0 0  
Cooling Degree Days 1 11  
Month to date cooling degree days 143 177  
Year to date cooling degree days 957 869  
Since 1 June cooling degree days 818 777  
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 53 °F    
Average Humidity 68    
Maximum Humidity 93    
Minimum Humidity 43    
Precipitation  
Precipitation 0.00 in 0.11 in 1.45 in (2003)
Month to date precipitation 1.15 1.91  
Year to date precipitation 27.05 26.38  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.17 in    
Wind  
Wind Speed 3 mph (SSE)    
Max Wind Speed 10 mph    
Max Gust Speed 18 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Date:

Astronomy

Aug. 16, 2013 Rise Set
Actual Time 6:24 AM EDT 8:02 PM EDT
Civil Twilight 5:56 AM EDT 8:31 PM EDT
Nautical Twilight 5:21 AM EDT 9:05 PM EDT
Astronomical Twilight 4:45 AM EDT 9:41 PM EDT
Moon 4:18 PM EDT (8/16) 1:26 AM EDT (8/16)
Length of Visible Light 14h 35m
Length of Day
13h 38m
Waxing Gibbous, 74% of the Moon is Illuminated
Aug 16
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
1:52 AM 59.0 °F 54.0 °F 83% 30.15 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:52 AM 55.0 °F 52.0 °F 89% 30.15 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:52 AM 55.0 °F 52.0 °F 89% 30.15 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:52 AM 54.0 °F 51.1 °F 90% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:52 AM 53.1 °F 51.1 °F 93% 30.16 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:52 AM 54.0 °F 52.0 °F 93% 30.17 in 10.0 mi WNW 3.5 mph - N/A   Scattered Clouds
7:52 AM 57.9 °F 54.0 °F 87% 30.17 in 10.0 mi NW 3.5 mph - N/A   Scattered Clouds
8:52 AM 64.0 °F 55.9 °F 75% 30.18 in 10.0 mi Calm Calm - N/A   Scattered Clouds
9:52 AM 70.0 °F 55.9 °F 61% 30.18 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:52 AM 73.0 °F 57.0 °F 57% 30.19 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:52 AM 73.9 °F 51.1 °F 45% 30.18 in 10.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
12:52 PM 75.9 °F 53.1 °F 45% 30.17 in 10.0 mi NE 3.5 mph 18.4 mph N/A   Mostly Cloudy
1:52 PM 75.9 °F 52.0 °F 43% 30.17 in 10.0 mi West 3.5 mph - N/A   Mostly Cloudy
2:52 PM 75.0 °F 53.1 °F 46% 30.15 in 10.0 mi SE 5.8 mph - N/A   Mostly Cloudy
3:52 PM 75.9 °F 52.0 °F 43% 30.15 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
4:52 PM 75.9 °F 52.0 °F 43% 30.15 in 10.0 mi SE 8.1 mph - N/A   Mostly Cloudy
5:52 PM 75.9 °F 52.0 °F 43% 30.15 in 10.0 mi East 6.9 mph - N/A   Mostly Cloudy
6:52 PM 75.9 °F 52.0 °F 43% 30.16 in 10.0 mi SSE 4.6 mph - N/A   Mostly Cloudy
7:52 PM 71.1 °F 53.1 °F 53% 30.16 in 10.0 mi SE 6.9 mph - N/A   Scattered Clouds
8:52 PM 69.1 °F 52.0 °F 54% 30.18 in 10.0 mi SSE 4.6 mph - N/A   Partly Cloudy
9:52 PM 62.1 °F 54.0 °F 75% 30.20 in 10.0 mi Calm Calm - N/A   Clear
10:52 PM 61.0 °F 55.0 °F 81% 30.20 in 10.0 mi Calm Calm - N/A   Clear
11:52 PM 59.0 °F 55.0 °F 87% 30.21 in 10.0 mi SE 3.5 mph - N/A   Clear