Weather History for Dulles Airport, VA

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Monday, January 13, 2014

  Actual Average Record
Temperature  
Mean Temperature 40 °F 33 °F  
Max Temperature 56 °F 42 °F 69 °F (2005)
Min Temperature 24 °F 24 °F -3 °F (1977)
Degree Days  
Heating Degree Days 25 32  
Month to date heating degree days 468 416  
Since 1 July heating degree days 2225 2214  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 31 °F    
Average Humidity 73    
Maximum Humidity 100    
Minimum Humidity 46    
Precipitation  
Precipitation T in 0.08 in 1.03 in (1964)
Month to date precipitation 1.94 1.07  
Year to date precipitation 1.94 1.07  
Snow  
Snow 0.00 in 0.30 in 6.00 in (1964)
Month to date snowfall 3.0 2.5  
Since 1 July snowfall 7.7 6.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.01 in    
Wind  
Wind Speed 7 mph (SSW)    
Max Wind Speed 20 mph    
Max Gust Speed 23 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

Jan. 13, 2014 Rise Set
Actual Time 7:27 AM EST 5:09 PM EST
Civil Twilight 6:58 AM EST 5:39 PM EST
Nautical Twilight 6:25 AM EST 6:12 PM EST
Astronomical Twilight 5:53 AM EST 6:44 PM EST
Moon 3:23 PM EST (1/13) 5:14 AM EST (1/13)
Length of Visible Light 10h 40m
Length of Day
9h 42m
Waxing Gibbous, 95% of the Moon is Illuminated
Jan 13
Waxing Gibbous
Jan 15
Full
Jan 24
Last Quarter
Jan 30
New
Feb 6
First Quarter

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 27.0 °F - 25.0 °F 92% 30.10 in 10.0 mi Calm Calm - N/A   Clear
1:52 AM 27.0 °F - 25.0 °F 92% 30.11 in 10.0 mi Calm Calm - N/A   Clear
2:52 AM 26.1 °F - 24.1 °F 92% 30.09 in 10.0 mi Calm Calm - N/A   Clear
3:52 AM 26.1 °F 20.5 °F 24.1 °F 92% 30.09 in 10.0 mi Variable 4.6 mph - N/A   Clear
4:52 AM 25.0 °F - 23.0 °F 92% 30.08 in 8.0 mi Calm Calm - N/A   Clear
5:52 AM 25.0 °F - 24.1 °F 96% 30.09 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:52 AM 25.0 °F - 23.0 °F 92% 30.09 in 9.0 mi Calm Calm - N/A   Scattered Clouds
7:52 AM 24.1 °F - 23.0 °F 96% 30.11 in 7.0 mi Calm Calm - N/A   Scattered Clouds
8:52 AM 33.1 °F - 28.9 °F 85% 30.10 in 8.0 mi Calm Calm - N/A   Scattered Clouds
9:52 AM 37.9 °F 35.5 °F 30.9 °F 76% 30.09 in 10.0 mi SSW 3.5 mph - N/A   Scattered Clouds
10:52 AM 42.1 °F 38.4 °F 30.9 °F 65% 30.06 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
11:52 AM 46.0 °F 41.9 °F 33.1 °F 61% 30.01 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
12:52 PM 52.0 °F - 35.1 °F 53% 29.97 in 10.0 mi SSW 9.2 mph - N/A   Mostly Cloudy
1:52 PM 55.9 °F - 35.1 °F 45% 29.94 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
2:52 PM 55.0 °F - 35.1 °F 47% 29.93 in 10.0 mi South 12.7 mph 21.9 mph N/A   Mostly Cloudy
3:52 PM 55.0 °F - 35.1 °F 47% 29.94 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
4:52 PM 53.1 °F - 35.1 °F 50% 29.94 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
5:52 PM 53.1 °F - 34.0 °F 48% 29.92 in 10.0 mi South 8.1 mph - N/A   Overcast
6:52 PM 52.0 °F - 35.1 °F 53% 29.92 in 10.0 mi South 12.7 mph - N/A   Overcast
7:52 PM 51.1 °F - 35.1 °F 54% 29.93 in 10.0 mi South 10.4 mph 18.4 mph N/A   Overcast
8:52 PM 51.1 °F - 35.1 °F 54% 29.91 in 10.0 mi South 12.7 mph - N/A   Overcast
9:52 PM 51.1 °F - 35.1 °F 54% 29.89 in 10.0 mi South 10.4 mph - N/A   Overcast
10:52 PM 51.1 °F - 35.1 °F 54% 29.89 in 10.0 mi South 15.0 mph - N/A   Overcast
11:52 PM 50.0 °F - 37.0 °F 61% 29.87 in 10.0 mi South 13.8 mph - 0.00 in Rain Light Rain