Weather History for Dulles Airport, VA

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Saturday, February 1, 2014

  Actual Average Record
Temperature  
Mean Temperature 36 °F 34 °F  
Max Temperature 49 °F 44 °F 75 °F (2002)
Min Temperature 22 °F 24 °F 2 °F (1965)
Degree Days  
Heating Degree Days 29 31  
Month to date heating degree days 29 31  
Since 1 July heating degree days 2948 2815  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 19 °F    
Average Humidity 54    
Maximum Humidity 84    
Minimum Humidity 23    
Precipitation  
Precipitation 0.00 in 0.10 in 1.44 in (2008)
Month to date precipitation 0.00 0.10  
Year to date precipitation 2.69 2.78  
Snow  
Snow 0.00 in 0.30 in 1.50 in (1966)
Month to date snowfall 0.0 0.3  
Since 1 July snowfall 16.7 11.6  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 4 mph (South)    
Max Wind Speed 13 mph    
Max Gust Speed 17 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 01, 2014 Rise Set
Actual Time 7:16 AM EST 5:31 PM EST
Civil Twilight 6:47 AM EST 5:59 PM EST
Nautical Twilight 6:16 AM EST 6:31 PM EST
Astronomical Twilight 5:44 AM EST 7:02 PM EST
Moon 8:05 AM EST (2/1) 8:02 PM EST (2/1)
Length of Visible Light 11h 11m
Length of Day
10h 15m
Waxing Crescent, 5% of the Moon is Illuminated
Feb 1
Waxing Crescent
Feb 6
First Quarter
Feb 14
Full
Feb 22
Last Quarter
Mar 1
New

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 25.0 °F - 17.1 °F 72% 30.22 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:52 AM 26.1 °F - 18.0 °F 71% 30.24 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:52 AM 23.0 °F - 18.0 °F 81% 30.24 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:52 AM 24.1 °F 17.0 °F 19.0 °F 81% 30.24 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
4:52 AM 25.0 °F - 18.0 °F 75% 30.26 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:52 AM 21.9 °F - 18.0 °F 85% 30.28 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
6:52 AM 21.9 °F 17.2 °F 18.0 °F 85% 30.30 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
7:52 AM 24.1 °F - 19.0 °F 81% 30.30 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:52 AM 34.0 °F - 19.0 °F 54% 30.30 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:52 AM 37.9 °F - 17.1 °F 43% 30.29 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:52 AM 42.1 °F 39.2 °F 14.0 °F 32% 30.28 in 10.0 mi SSW 4.6 mph - N/A   Overcast
11:52 AM 45.0 °F 41.2 °F 14.0 °F 29% 30.25 in 10.0 mi South 6.9 mph - N/A   Overcast
12:52 PM 46.0 °F 41.0 °F 14.0 °F 28% 30.21 in 10.0 mi SE 10.4 mph - N/A   Overcast
1:52 PM 48.0 °F - 12.9 °F 24% 30.16 in 10.0 mi SSE 12.7 mph - N/A   Overcast
2:52 PM 48.0 °F - 14.0 °F 26% 30.13 in 10.0 mi SSE 5.8 mph - N/A   Overcast
3:52 PM 48.0 °F - 16.0 °F 28% 30.14 in 10.0 mi SSE 10.4 mph - N/A   Mostly Cloudy
4:52 PM 46.9 °F - 17.1 °F 30% 30.13 in 10.0 mi SE 6.9 mph - N/A   Mostly Cloudy
5:52 PM 43.0 °F 38.8 °F 18.0 °F 37% 30.12 in 10.0 mi SSE 6.9 mph - N/A   Scattered Clouds
6:52 PM 42.1 °F 37.7 °F 21.0 °F 43% 30.11 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
7:52 PM 41.0 °F 37.1 °F 26.1 °F 55% 30.09 in 10.0 mi South 5.8 mph - N/A   Scattered Clouds
8:52 PM 42.1 °F 37.7 °F 25.0 °F 51% 30.07 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
9:52 PM 36.0 °F 31.1 °F 26.1 °F 67% 30.05 in 10.0 mi SW 5.8 mph - N/A   Scattered Clouds
10:52 PM 35.1 °F - 25.0 °F 67% 30.02 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:52 PM 30.9 °F - 24.1 °F 76% 30.01 in 10.0 mi Calm Calm - N/A   Scattered Clouds