Weather History for Dulles Airport, VA

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Monday, August 19, 2013

  Actual Average Record
Temperature  
Mean Temperature 67 °F 75 °F  
Max Temperature 75 °F 87 °F 95 °F (2002)
Min Temperature 59 °F 64 °F 51 °F (1998)
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 2 10  
Month to date cooling degree days 150 209  
Year to date cooling degree days 964 901  
Since 1 June cooling degree days 825 809  
Growing Degree Days 17 (Base 50)    
Moisture  
Dew Point 63 °F    
Average Humidity 85    
Maximum Humidity 97    
Minimum Humidity 73    
Precipitation  
Precipitation 0.00 in 0.11 in 1.54 in (1967)
Month to date precipitation 1.21 2.25  
Year to date precipitation 27.11 26.72  
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 30.14 in    
Wind  
Wind Speed 4 mph (SSW)    
Max Wind Speed 10 mph    
Max Gust Speed 16 mph    
Visibility 8 miles    
Events      
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

Aug. 19, 2013 Rise Set
Actual Time 6:27 AM EDT 7:58 PM EDT
Civil Twilight 5:58 AM EDT 8:26 PM EDT
Nautical Twilight 5:25 AM EDT 9:00 PM EDT
Astronomical Twilight 4:49 AM EDT 9:36 PM EDT
Moon 6:48 PM EDT (8/19) 4:44 AM EDT (8/19)
Length of Visible Light 14h 27m
Length of Day
13h 31m
Waxing Gibbous, 97% of the Moon is Illuminated
Aug 19
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 62.1 °F 60.1 °F 93% 30.19 in 8.0 mi Calm Calm - N/A   Mostly Cloudy
1:52 AM 62.1 °F 60.1 °F 93% 30.18 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
2:52 AM 62.1 °F 60.1 °F 93% 30.17 in 5.0 mi Calm Calm - N/A   Scattered Clouds
3:52 AM 60.1 °F 57.9 °F 93% 30.17 in 4.0 mi Calm Calm - N/A   Partly Cloudy
4:52 AM 60.1 °F 59.0 °F 96% 30.15 in 4.0 mi Calm Calm - N/A   Mostly Cloudy
5:52 AM 61.0 °F 59.0 °F 93% 30.16 in 4.0 mi Calm Calm - N/A   Overcast
6:52 AM 62.1 °F 60.1 °F 93% 30.16 in 5.0 mi Calm Calm - N/A   Overcast
7:33 AM 62.6 °F 60.8 °F 94% 30.17 in 5.0 mi Calm Calm - N/A   Mostly Cloudy
7:52 AM 63.0 °F 61.0 °F 93% 30.17 in 4.0 mi SW 4.6 mph - N/A   Mostly Cloudy
8:52 AM 64.9 °F 63.0 °F 93% 30.16 in 9.0 mi South 5.8 mph - N/A   Mostly Cloudy
9:52 AM 68.0 °F 61.0 °F 78% 30.15 in 10.0 mi SSW 8.1 mph - N/A   Overcast
10:52 AM 68.0 °F 61.0 °F 78% 30.15 in 10.0 mi South 6.9 mph - N/A   Overcast
11:52 AM 69.1 °F 61.0 °F 75% 30.14 in 10.0 mi SSW 6.9 mph - N/A   Overcast
12:52 PM 70.0 °F 63.0 °F 78% 30.14 in 10.0 mi SSW 6.9 mph - N/A   Overcast
1:40 PM 71.6 °F 64.4 °F 78% 30.14 in 10.0 mi South 8.1 mph - N/A   Overcast
1:52 PM 71.1 °F 63.0 °F 75% 30.13 in 10.0 mi South 9.2 mph - N/A   Overcast
2:52 PM 73.0 °F 64.0 °F 73% 30.11 in 10.0 mi SSW 6.9 mph - N/A   Overcast
3:28 PM 73.4 °F 64.4 °F 73% 30.11 in 10.0 mi SW 6.9 mph - N/A   Overcast
3:52 PM 73.9 °F 64.9 °F 73% 30.10 in 10.0 mi Variable 5.8 mph - N/A   Overcast
4:52 PM 73.9 °F 64.9 °F 73% 30.09 in 10.0 mi SSE 4.6 mph - N/A   Overcast
5:20 PM 73.4 °F 64.4 °F 73% 30.10 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
5:52 PM 73.9 °F 64.9 °F 73% 30.09 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
6:52 PM 73.9 °F 64.9 °F 73% 30.09 in 10.0 mi SW 8.1 mph - N/A   Mostly Cloudy
7:52 PM 71.1 °F 64.9 °F 81% 30.09 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
8:52 PM 70.0 °F 64.9 °F 84% 30.10 in 10.0 mi SW 4.6 mph - N/A   Mostly Cloudy
9:37 PM 71.6 °F 64.4 °F 78% 30.12 in 10.0 mi SSW 8.1 mph - N/A   Overcast
9:52 PM 71.1 °F 64.9 °F 81% 30.12 in 10.0 mi SSW 5.8 mph - N/A   Overcast
10:52 PM 71.1 °F 64.9 °F 81% 30.12 in 10.0 mi SSW 5.8 mph - N/A   Overcast
11:52 PM 71.1 °F 64.9 °F 81% 30.13 in 10.0 mi SW 3.5 mph - N/A   Overcast