Weather History for Dulles Airport, VA

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Tuesday, May 1, 2012

  Actual Average Record
Temperature  
Mean Temperature 71 °F 59 °F  
Max Temperature 84 °F 71 °F 90 °F (2010)
Min Temperature 57 °F 47 °F 33 °F (1996)
Degree Days  
Heating Degree Days 0 7  
Month to date heating degree days 0 7  
Since 1 July heating degree days 3729 4579  
Cooling Degree Days 6 1  
Month to date cooling degree days 6 1  
Year to date cooling degree days 34 21  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 57 °F    
Average Humidity 67    
Maximum Humidity 93    
Minimum Humidity 40    
Precipitation  
Precipitation 0.09 in 0.13 in 1.42 in (1981)
Month to date precipitation 0.09 0.13  
Year to date precipitation 7.52 12.40  
Snow  
Snow 0.00 in 0.00 in T in (1963)
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 3.7 22.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.01 in    
Wind  
Wind Speed 6 mph (SSW)    
Max Wind Speed 15 mph    
Max Gust Speed 20 mph    
Visibility 9 miles    
Events Rain , Thunderstorm    
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

May. 01, 2012 Rise Set
Actual Time 6:11 AM EDT 8:02 PM EDT
Civil Twilight 5:42 AM EDT 8:31 PM EDT
Nautical Twilight 5:07 AM EDT 9:06 PM EDT
Astronomical Twilight 4:30 AM EDT 9:44 PM EDT
Moon 3:06 PM EDT (5/1) 3:04 AM EDT (5/1)
Length of Visible Light 14h 49m
Length of Day
13h 51m
Waxing Gibbous, 73% of the Moon is Illuminated
May 1
Waxing Gibbous
May 5
Full
May 12
Last Quarter
May 20
New
May 28
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:24 AM 60.8 °F - 46.4 °F 59% 30.11 in 10.0 mi SSE 4.6 mph - N/A Thunderstorm Thunderstorm
12:52 AM 60.1 °F - 48.0 °F 64% 30.09 in 10.0 mi SSE 6.9 mph - N/A   Overcast
1:52 AM 57.9 °F - 48.0 °F 70% 30.05 in 10.0 mi SSE 9.2 mph - N/A   Mostly Cloudy
2:26 AM 59.0 °F - 48.2 °F 67% 30.04 in 10.0 mi SSE 6.9 mph - N/A   Overcast
2:52 AM 59.0 °F - 50.0 °F 72% 30.03 in 10.0 mi SSE 6.9 mph - N/A   Overcast
3:52 AM 59.0 °F - 51.1 °F 75% 30.01 in 10.0 mi SSE 8.1 mph - N/A   Overcast
4:52 AM 59.0 °F - 52.0 °F 78% 30.04 in 10.0 mi West 5.8 mph - N/A   Overcast
5:26 AM 57.2 °F - 53.6 °F 88% 30.01 in 10.0 mi SSE 4.6 mph - 0.01 in Rain Light Rain
5:52 AM 57.0 °F - 54.0 °F 89% 30.02 in 7.0 mi South 5.8 mph - 0.01 in Rain Light Rain
6:16 AM 57.2 °F - 53.6 °F 88% 30.01 in 4.0 mi South 8.1 mph - 0.03 in Rain Rain
6:35 AM 57.2 °F - 55.4 °F 94% 29.99 in 7.0 mi South 8.1 mph - 0.07 in Rain Light Rain
6:52 AM 57.0 °F - 55.9 °F 96% 30.00 in 7.0 mi SSW 10.4 mph - 0.08 in Rain Light Rain
7:34 AM 57.2 °F - 57.2 °F 100% 30.01 in 5.0 mi SSW 9.2 mph - 0.00 in   Mostly Cloudy
7:52 AM 59.0 °F - 57.2 °F 94% 30.02 in 5.0 mi SSW 10.4 mph - N/A   Mostly Cloudy
8:52 AM 64.0 °F - 61.0 °F 90% 30.00 in 10.0 mi SSW 11.5 mph - N/A   Mostly Cloudy
9:52 AM 68.0 °F - 62.6 °F 83% 30.01 in 10.0 mi SSW 11.5 mph - N/A   Overcast
10:52 AM 71.1 °F - 62.1 °F 73% 30.02 in 10.0 mi SW 11.5 mph - N/A   Overcast
11:52 AM 75.9 °F - 63.0 °F 64% 30.01 in 10.0 mi WSW 9.2 mph - N/A   Mostly Cloudy
12:52 PM 77.0 °F - 63.0 °F 62% 30.01 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy
1:52 PM 80.1 °F 81.1 °F 61.0 °F 52% 30.00 in 10.0 mi NW 8.1 mph - N/A   Mostly Cloudy
2:52 PM 82.9 °F 83.2 °F 60.1 °F 46% 29.99 in 10.0 mi WNW 8.1 mph - N/A   Mostly Cloudy
3:52 PM 82.4 °F 82.0 °F 57.2 °F 42% 29.99 in 10.0 mi NW 10.4 mph - N/A   Overcast
4:52 PM 84.0 °F 83.3 °F 57.0 °F 40% 29.98 in 10.0 mi NNW 4.6 mph - N/A   Overcast
5:52 PM 82.0 °F 81.4 °F 55.0 °F 39% 29.98 in 10.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
6:52 PM 81.0 °F 81.1 °F 57.9 °F 45% 29.98 in 10.0 mi SW 4.6 mph - N/A   Mostly Cloudy
7:52 PM 77.0 °F - 61.0 °F 58% 29.97 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
8:52 PM 70.0 °F - 61.0 °F 73% 29.98 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:52 PM 69.1 °F - 61.0 °F 75% 30.00 in 10.0 mi SE 3.5 mph - N/A   Scattered Clouds
10:52 PM 63.0 °F - 60.1 °F 90% 30.00 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:52 PM 63.0 °F - 60.1 °F 90% 30.01 in 10.0 mi Calm Calm - N/A   Scattered Clouds