Weather History for Dulles Airport, VA

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Thursday, May 2, 2013

  Actual Average Record
Temperature  
Mean Temperature 54 °F 59 °F  
Max Temperature 69 °F 72 °F 88 °F (1992)
Min Temperature 38 °F 47 °F 34 °F (1979)
Degree Days  
Heating Degree Days 11 7  
Month to date heating degree days 18 14  
Since 1 July heating degree days 4432 4586  
Cooling Degree Days 0 1  
Month to date cooling degree days 0 2  
Year to date cooling degree days 30 22  
Growing Degree Days 3 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 66    
Maximum Humidity 93    
Minimum Humidity 39    
Precipitation  
Precipitation 0.00 in 0.12 in 0.85 in (1977)
Month to date precipitation 0.00 0.25  
Year to date precipitation 10.79 12.52  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 12.7 22.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.39 in    
Wind  
Wind Speed 4 mph (East)    
Max Wind Speed 14 mph    
Max Gust Speed 18 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 02, 2013 Rise Set
Actual Time 6:10 AM EDT 8:03 PM EDT
Civil Twilight 5:41 AM EDT 8:32 PM EDT
Nautical Twilight 5:06 AM EDT 9:07 PM EDT
Astronomical Twilight 4:28 AM EDT 9:45 PM EDT
Moon 1:52 AM EDT (5/2) 12:54 PM EDT (5/2)
Length of Visible Light 14h 51m
Length of Day
13h 53m
Waning Gibbous, 48% of the Moon is Illuminated
May 2
Waning Gibbous
May 9
New
May 18
First Quarter
May 25
Full
May 31
Last Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 46.9 °F - 42.1 °F 83% 30.43 in 10.0 mi Calm Calm - N/A   Clear
1:52 AM 46.9 °F - 44.1 °F 90% 30.42 in 10.0 mi Calm Calm - N/A   Clear
2:52 AM 45.0 °F - 42.1 °F 90% 30.40 in 10.0 mi Calm Calm - N/A   Clear
3:52 AM 43.0 °F - 39.9 °F 89% 30.40 in 10.0 mi Calm Calm - N/A   Clear
4:52 AM 41.0 °F 39.0 °F 39.0 °F 93% 30.40 in 10.0 mi WNW 3.5 mph - N/A   Clear
5:52 AM 39.9 °F - 37.9 °F 93% 30.41 in 10.0 mi Calm Calm - N/A   Clear
6:52 AM 42.1 °F - 39.9 °F 92% 30.42 in 10.0 mi Calm Calm - N/A   Clear
7:52 AM 50.0 °F - 45.0 °F 83% 30.43 in 10.0 mi NE 3.5 mph - N/A   Partly Cloudy
8:28 AM 50.0 °F - 44.6 °F 82% 30.44 in 10.0 mi East 9.2 mph - N/A   Mostly Cloudy
8:52 AM 50.0 °F - 44.1 °F 80% 30.44 in 10.0 mi ENE 10.4 mph - N/A   Mostly Cloudy
9:52 AM 50.0 °F - 44.1 °F 80% 30.45 in 10.0 mi ENE 5.8 mph - N/A   Overcast
10:26 AM 53.6 °F - 44.6 °F 72% 30.45 in 10.0 mi Variable 3.5 mph - N/A   Overcast
10:52 AM 55.0 °F - 44.1 °F 67% 30.44 in 10.0 mi East 3.5 mph - N/A   Scattered Clouds
11:52 AM 59.0 °F - 43.0 °F 55% 30.43 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
12:52 PM 63.0 °F - 45.0 °F 52% 30.41 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
1:52 PM 66.0 °F - 43.0 °F 43% 30.39 in 10.0 mi East 5.8 mph - N/A   Partly Cloudy
2:52 PM 68.0 °F - 45.0 °F 43% 30.38 in 10.0 mi ESE 8.1 mph - N/A   Partly Cloudy
3:52 PM 68.0 °F - 44.1 °F 42% 30.36 in 10.0 mi Variable 6.9 mph - N/A   Partly Cloudy
4:52 PM 68.0 °F - 42.1 °F 39% 30.34 in 10.0 mi East 11.5 mph - N/A   Clear
5:52 PM 66.0 °F - 46.0 °F 48% 30.34 in 10.0 mi SE 10.4 mph - N/A   Scattered Clouds
6:52 PM 64.9 °F - 45.0 °F 48% 30.33 in 10.0 mi ESE 6.9 mph - N/A   Scattered Clouds
7:52 PM 62.1 °F - 44.1 °F 52% 30.33 in 10.0 mi ESE 5.8 mph - N/A   Mostly Cloudy
8:52 PM 59.0 °F - 43.0 °F 55% 30.33 in 10.0 mi SE 3.5 mph - N/A   Mostly Cloudy
9:52 PM 54.0 °F - 43.0 °F 66% 30.33 in 10.0 mi SE 3.5 mph - N/A   Partly Cloudy
10:52 PM 50.0 °F - 43.0 °F 77% 30.33 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:52 PM 48.0 °F - 43.0 °F 83% 30.32 in 10.0 mi Calm Calm - N/A   Scattered Clouds