Weather History for Dulles Airport, VA

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Thursday, August 8, 2013

  Actual Average Record
Temperature  
Mean Temperature 80 °F 76 °F  
Max Temperature 86 °F 87 °F 101 °F (2007)
Min Temperature 73 °F 65 °F 49 °F (1989)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 June heating degree days 0 15  
Since 1 July heating degree days 0 0  
Cooling Degree Days 15 11  
Month to date cooling degree days 72 89  
Year to date cooling degree days 886 781  
Since 1 June cooling degree days 747 689  
Growing Degree Days 30 (Base 50)    
Moisture  
Dew Point 71 °F    
Average Humidity 76    
Maximum Humidity 87    
Minimum Humidity 65    
Precipitation  
Precipitation 0.25 in 0.12 in 0.74 in (2005)
Month to date precipitation 0.38 0.99  
Year to date precipitation 26.28 25.46  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.01 in    
Wind  
Wind Speed 7 mph (South)    
Max Wind Speed 16 mph    
Max Gust Speed 22 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Aug. 08, 2013 Rise Set
Actual Time 6:17 AM EDT 8:13 PM EDT
Civil Twilight 5:48 AM EDT 8:41 PM EDT
Nautical Twilight 5:12 AM EDT 9:17 PM EDT
Astronomical Twilight 4:34 AM EDT 9:55 PM EDT
Moon 8:00 AM EDT (8/8) 8:52 PM EDT (8/8)
Length of Visible Light 14h 53m
Length of Day
13h 55m
Waxing Crescent, 3% of the Moon is Illuminated
Aug 8
Waxing Crescent
Aug 14
First Quarter
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 77.0 °F - 69.1 °F 76% 30.03 in 10.0 mi South 6.9 mph - N/A   Overcast
1:52 AM 75.9 °F - 70.0 °F 82% 30.02 in 10.0 mi South 5.8 mph - N/A   Overcast
2:52 AM 73.9 °F - 69.1 °F 85% 30.01 in 10.0 mi SSE 5.8 mph - N/A   Mostly Cloudy
3:52 AM 73.9 °F - 69.1 °F 85% 30.01 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
4:52 AM 73.9 °F - 69.1 °F 85% 30.00 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
5:52 AM 73.0 °F - 69.1 °F 87% 30.01 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
6:52 AM 73.9 °F - 70.0 °F 87% 30.03 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
7:52 AM 75.0 °F - 70.0 °F 84% 30.03 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
8:52 AM 75.9 °F - 70.0 °F 82% 30.03 in 10.0 mi South 10.4 mph - N/A   Mostly Cloudy
9:52 AM 80.1 °F 83.2 °F 70.0 °F 71% 30.03 in 10.0 mi South 11.5 mph - N/A   Mostly Cloudy
10:52 AM 80.1 °F 83.2 °F 70.0 °F 71% 30.03 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
11:52 AM 82.9 °F 87.0 °F 70.0 °F 65% 30.02 in 10.0 mi SSW 9.2 mph - N/A   Mostly Cloudy
12:52 PM 82.0 °F 85.9 °F 70.0 °F 67% 30.02 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
1:52 PM 82.0 °F 86.3 °F 71.1 °F 69% 30.02 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
2:52 PM 84.0 °F 89.0 °F 71.1 °F 65% 30.01 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
3:42 PM 80.6 °F 85.4 °F 73.4 °F 79% 30.02 in 0.5 mi WSW 11.5 mph - 0.00 in Rain Rain
3:52 PM 78.1 °F - 75.0 °F 90% 30.00 in 7.0 mi SE 5.8 mph - 0.24 in Rain Light Rain
4:52 PM 77.0 °F - 72.0 °F 84% 29.99 in 10.0 mi South 10.4 mph - 0.00 in Rain Light Rain
5:52 PM 79.0 °F - 73.9 °F 84% 29.99 in 10.0 mi SSE 4.6 mph - 0.01 in   Overcast
6:52 PM 80.1 °F 85.1 °F 75.0 °F 85% 29.98 in 10.0 mi SSE 5.8 mph - N/A   Overcast
7:52 PM 79.0 °F - 73.9 °F 84% 29.99 in 10.0 mi SSE 4.6 mph - N/A   Overcast
8:52 PM 78.1 °F - 73.9 °F 87% 29.99 in 10.0 mi SSE 5.8 mph - 0.00 in   Overcast
9:52 PM 78.1 °F - 73.0 °F 84% 29.99 in 10.0 mi South 5.8 mph - N/A   Overcast
10:52 PM 78.1 °F - 73.0 °F 84% 29.99 in 10.0 mi SSE 4.6 mph - N/A   Overcast
11:52 PM 78.1 °F - 73.0 °F 84% 29.98 in 10.0 mi South 5.8 mph - N/A   Overcast