Weather History for Dulles Airport, VA

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Sunday, February 12, 2012

  Actual Average Record
Temperature  
Mean Temperature 26 °F 36 °F  
Max Temperature 31 °F 46 °F 74 °F (1999)
Min Temperature 20 °F 25 °F 3 °F (1964)
Degree Days  
Heating Degree Days 39 29  
Month to date heating degree days 311 364  
Since 1 July heating degree days 2674 3148  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 9 °F    
Average Humidity 58    
Maximum Humidity 77    
Minimum Humidity 39    
Precipitation  
Precipitation T in 0.09 in 1.77 in (1985)
Month to date precipitation 0.49 1.18  
Year to date precipitation 2.34 3.86  
Snow  
Snow T in 0.30 in 5.10 in (1979)
Month to date snowfall 1.4 3.7  
Since 1 July snowfall 3.7 15.0  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 30.07 in    
Wind  
Wind Speed 19 mph (NW)    
Max Wind Speed 31 mph    
Max Gust Speed 43 mph    
Visibility 10 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Feb. 12, 2012 Rise Set
Actual Time 7:05 AM EST 5:43 PM EST
Civil Twilight 6:37 AM EST 6:10 PM EST
Nautical Twilight 6:06 AM EST 6:42 PM EST
Astronomical Twilight 5:35 AM EST 7:13 PM EST
Moon 11:35 PM EST (2/12) 9:26 AM EST (2/12)
Length of Visible Light 11h 32m
Length of Day
10h 38m
Waning Gibbous, 72% of the Moon is Illuminated
Feb 12
Waning Gibbous
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter
Mar 8
Full

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:14 AM 21.2 °F 3.9 °F 14.0 °F 74% 29.92 in 2.0 mi NNW 26.5 mph 36.8 mph 0.00 in Snow Light Snow
12:47 AM 23.0 °F 6.6 °F 6.8 °F 50% 29.93 in 7.0 mi NNW 25.3 mph 40.3 mph 0.00 in   Overcast
12:52 AM 23.0 °F 6.3 °F 7.0 °F 50% 29.94 in 7.0 mi NNW 26.5 mph 40.3 mph 0.00 in   Overcast
1:52 AM 21.9 °F 4.5 °F 7.0 °F 53% 29.98 in 10.0 mi NW 27.6 mph 35.7 mph N/A   Clear
2:52 AM 21.9 °F 5.8 °F 8.1 °F 55% 30.01 in 10.0 mi NW 23.0 mph 33.4 mph N/A   Mostly Cloudy
3:52 AM 21.0 °F 5.4 °F 8.1 °F 57% 30.02 in 10.0 mi NW 20.7 mph 27.6 mph N/A   Scattered Clouds
4:52 AM 21.0 °F 5.4 °F 8.1 °F 57% 30.05 in 10.0 mi NW 20.7 mph 26.5 mph N/A   Scattered Clouds
5:52 AM 21.0 °F 8.1 °F 8.1 °F 57% 30.07 in 10.0 mi WNW 13.8 mph 24.2 mph N/A   Mostly Cloudy
6:52 AM 19.9 °F 3.9 °F 7.0 °F 57% 30.07 in 10.0 mi WNW 20.7 mph 26.5 mph N/A   Mostly Cloudy
7:52 AM 21.0 °F 6.2 °F 7.0 °F 55% 30.09 in 10.0 mi NW 18.4 mph 26.5 mph N/A   Mostly Cloudy
8:52 AM 21.9 °F 8.7 °F 7.0 °F 53% 30.10 in 10.0 mi NW 15.0 mph 28.8 mph N/A   Mostly Cloudy
9:52 AM 24.1 °F 9.4 °F 7.0 °F 48% 30.11 in 10.0 mi NW 20.7 mph 33.4 mph N/A   Mostly Cloudy
10:52 AM 27.0 °F 13.2 °F 9.0 °F 47% 30.12 in 10.0 mi NW 20.7 mph 28.8 mph N/A   Scattered Clouds
11:52 AM 28.0 °F 13.9 °F 9.0 °F 45% 30.10 in 10.0 mi WNW 23.0 mph 34.5 mph N/A   Mostly Cloudy
12:52 PM 28.0 °F 13.9 °F 8.1 °F 43% 30.09 in 10.0 mi WNW 23.0 mph 38.0 mph N/A   Mostly Cloudy
1:52 PM 28.9 °F 15.1 °F 8.1 °F 41% 30.08 in 10.0 mi NW 23.0 mph 36.8 mph N/A   Overcast
2:52 PM 30.9 °F 18.4 °F 9.0 °F 40% 30.07 in 10.0 mi WNW 20.7 mph 31.1 mph N/A   Mostly Cloudy
3:52 PM 28.9 °F 15.8 °F 9.0 °F 43% 30.08 in 10.0 mi West 20.7 mph 27.6 mph N/A   Mostly Cloudy
4:52 PM 28.9 °F 16.5 °F 10.0 °F 45% 30.09 in 10.0 mi WNW 18.4 mph 26.5 mph N/A   Mostly Cloudy
5:52 PM 27.0 °F 14.7 °F 9.0 °F 47% 30.10 in 10.0 mi WNW 16.1 mph 23.0 mph N/A   Scattered Clouds
6:52 PM 26.1 °F 16.2 °F 9.0 °F 49% 30.12 in 10.0 mi WNW 10.4 mph - N/A   Partly Cloudy
7:52 PM 26.1 °F 13.6 °F 9.0 °F 49% 30.14 in 10.0 mi WNW 16.1 mph 20.7 mph N/A   Partly Cloudy
8:52 PM 25.0 °F 13.6 °F 10.0 °F 53% 30.15 in 10.0 mi WNW 12.7 mph - N/A   Partly Cloudy
9:52 PM 25.0 °F 11.7 °F 10.0 °F 53% 30.15 in 10.0 mi WNW 17.3 mph 25.3 mph N/A   Partly Cloudy
10:52 PM 25.0 °F 15.5 °F 10.9 °F 55% 30.15 in 10.0 mi WNW 9.2 mph - N/A   Clear
11:52 PM 26.1 °F 15.0 °F 10.9 °F 53% 30.14 in 10.0 mi NW 12.7 mph - N/A   Clear