Weather History for Dulles Airport, VA

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Thursday, February 28, 2013

  Actual Average Record
Temperature  
Mean Temperature 41 °F 39 °F  
Max Temperature 45 °F 50 °F 70 °F (1965)
Min Temperature 37 °F 28 °F 10 °F (1993)
Degree Days  
Heating Degree Days 24 26  
Month to date heating degree days 828 807  
Since 1 July heating degree days 3364 3590  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 28 °F    
Average Humidity 61    
Maximum Humidity 76    
Minimum Humidity 45    
Precipitation  
Precipitation 0.01 in 0.09 in 1.13 in (1966)
Month to date precipitation 1.63 2.74  
Year to date precipitation 5.33 5.42  
Snow  
Snow 0.00 in 0.20 in 4.10 in (2005)
Month to date snowfall 1.3 7.6  
Since 1 July snowfall 5.3 18.9  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.68 in    
Wind  
Wind Speed 9 mph (West)    
Max Wind Speed 21 mph    
Max Gust Speed 30 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Feb. 28, 2013 Rise Set
Actual Time 6:43 AM EST 6:01 PM EST
Civil Twilight 6:16 AM EST 6:28 PM EST
Nautical Twilight 5:45 AM EST 6:59 PM EST
Astronomical Twilight 5:14 AM EST 7:30 PM EST
Moon 9:24 PM EST (2/28) 7:53 AM EST (2/28)
Length of Visible Light 12h 11m
Length of Day
11h 18m
Waning Gibbous, 91% of the Moon is Illuminated
Feb 28
Waning Gibbous
Mar 4
Last Quarter
Mar 11
New
Mar 19
First Quarter
Mar 27
Full

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 45.0 °F 40.6 °F 33.1 °F 63% 29.65 in 10.0 mi WNW 8.1 mph - N/A   Overcast
1:52 AM 43.0 °F 38.8 °F 35.1 °F 74% 29.66 in 10.0 mi West 6.9 mph - N/A   Light Drizzle
2:52 AM 43.0 °F 39.5 °F 35.1 °F 74% 29.65 in 10.0 mi Variable 5.8 mph - 0.00 in Rain Light Rain
3:52 AM 42.1 °F 39.2 °F 34.0 °F 73% 29.65 in 10.0 mi West 4.6 mph - 0.01 in   Overcast
4:52 AM 41.0 °F 37.1 °F 33.1 °F 73% 29.66 in 10.0 mi WNW 5.8 mph - N/A   Overcast
5:52 AM 39.9 °F 36.7 °F 30.0 °F 68% 29.67 in 10.0 mi Variable 4.6 mph - N/A   Overcast
6:52 AM 37.9 °F 32.7 °F 28.9 °F 70% 29.68 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
7:52 AM 39.9 °F 36.7 °F 28.9 °F 65% 29.69 in 10.0 mi Variable 4.6 mph - N/A   Scattered Clouds
8:52 AM 43.0 °F 37.7 °F 25.0 °F 49% 29.69 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
9:52 AM 44.1 °F 37.7 °F 24.1 °F 45% 29.68 in 10.0 mi West 12.7 mph 18.4 mph N/A   Mostly Cloudy
10:52 AM 45.0 °F 40.6 °F 24.1 °F 44% 29.67 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
11:52 AM 44.1 °F 39.5 °F 25.0 °F 47% 29.68 in 10.0 mi WSW 8.1 mph - N/A   Mostly Cloudy
12:52 PM 43.0 °F 35.7 °F 28.0 °F 56% 29.67 in 10.0 mi WNW 15.0 mph 19.6 mph N/A   Overcast
1:52 PM 43.0 °F 36.0 °F 30.0 °F 60% 29.67 in 10.0 mi West 13.8 mph - N/A   Overcast
2:52 PM 43.0 °F 35.7 °F 27.0 °F 53% 29.66 in 10.0 mi West 15.0 mph - 0.00 in   Overcast
3:52 PM 44.1 °F 38.6 °F 27.0 °F 51% 29.66 in 10.0 mi WSW 10.4 mph - N/A   Overcast
4:52 PM 44.1 °F 37.1 °F 24.1 °F 45% 29.66 in 10.0 mi West 15.0 mph 21.9 mph N/A   Overcast
5:52 PM 42.1 °F 34.9 °F 26.1 °F 53% 29.69 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
6:52 PM 42.1 °F 37.1 °F 26.1 °F 53% 29.71 in 10.0 mi West 8.1 mph - N/A   Overcast
7:52 PM 41.0 °F 34.7 °F 27.0 °F 57% 29.73 in 10.0 mi West 10.4 mph - N/A   Overcast
8:52 PM 41.0 °F 34.7 °F 26.1 °F 55% 29.74 in 10.0 mi WSW 10.4 mph - N/A   Overcast
9:52 PM 41.0 °F 34.7 °F 27.0 °F 57% 29.74 in 10.0 mi West 10.4 mph - N/A   Overcast
10:52 PM 41.0 °F 35.8 °F 28.0 °F 60% 29.73 in 10.0 mi West 8.1 mph 18.4 mph N/A   Overcast
11:52 PM 39.9 °F 35.1 °F 28.9 °F 65% 29.74 in 10.0 mi West 6.9 mph - N/A   Overcast