Weather History for Dulles Airport, VA

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Monday, January 14, 2013

  Actual Average Record
Temperature  
Mean Temperature 50 °F 33 °F  
Max Temperature 59 °F 42 °F 72 °F (1995)
Min Temperature 40 °F 24 °F 5 °F (1970)
Degree Days  
Heating Degree Days 15 32  
Month to date heating degree days 359 448  
Since 1 July heating degree days 2047 2246  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 47 °F    
Average Humidity 77    
Maximum Humidity 100    
Minimum Humidity 54    
Precipitation  
Precipitation 0.12 in 0.09 in 1.79 in (2005)
Month to date precipitation 0.17 1.16  
Year to date precipitation 0.17 1.16  
Snow  
Snow 0.00 in 0.20 in 0.30 in (1978)
Month to date snowfall T 2.7  
Since 1 July snowfall 2.2 6.7  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.13 in    
Wind  
Wind Speed 10 mph (NW)    
Max Wind Speed 17 mph    
Max Gust Speed 23 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 14, 2013 Rise Set
Actual Time 7:27 AM EST 5:11 PM EST
Civil Twilight 6:57 AM EST 5:40 PM EST
Nautical Twilight 6:25 AM EST 6:13 PM EST
Astronomical Twilight 5:53 AM EST 6:45 PM EST
Moon 9:01 AM EST (1/14) 8:51 PM EST (1/14)
Length of Visible Light 10h 42m
Length of Day
9h 43m
Waxing Crescent, 11% of the Moon is Illuminated
Jan 14
Waxing Crescent
Jan 18
First Quarter
Jan 26
Full
Feb 3
Last Quarter
Feb 10
New

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 57.0 °F - 57.0 °F 100% 29.97 in 4.0 mi SSW 9.2 mph - N/A   Overcast
1:33 AM 57.2 °F - 55.4 °F 94% 29.98 in 5.0 mi SW 3.5 mph - N/A   Overcast
1:52 AM 57.0 °F - 57.0 °F 100% 29.98 in 5.0 mi SSW 5.8 mph - N/A   Overcast
2:52 AM 57.9 °F - 57.0 °F 97% 29.99 in 9.0 mi South 8.1 mph - N/A   Overcast
3:52 AM 57.2 °F - 57.2 °F 100% 29.96 in 8.0 mi South 6.9 mph - N/A Rain Light Rain
4:52 AM 57.9 °F - 57.0 °F 97% 29.97 in 9.0 mi South 8.1 mph - 0.00 in   Mostly Cloudy
5:52 AM 59.0 °F - 57.0 °F 93% 29.98 in 10.0 mi South 5.8 mph - N/A   Overcast
6:52 AM 59.0 °F - 57.0 °F 93% 30.01 in 10.0 mi South 8.1 mph - N/A   Overcast
7:42 AM 57.2 °F - 57.2 °F 100% 30.07 in 9.0 mi NW 15.0 mph 23.0 mph N/A   Mostly Cloudy
7:52 AM 59.0 °F - 57.0 °F 93% 30.07 in 10.0 mi NW 11.5 mph 18.4 mph N/A   Overcast
8:05 AM 57.2 °F - 53.6 °F 88% 30.10 in 10.0 mi NNW 16.1 mph - N/A   Overcast
8:52 AM 55.9 °F - 51.1 °F 84% 30.12 in 10.0 mi North 10.4 mph - N/A   Overcast
9:00 AM 55.4 °F - 50.0 °F 82% 30.13 in 10.0 mi North 9.2 mph - N/A   Overcast
9:52 AM 55.9 °F - 48.0 °F 75% 30.14 in 10.0 mi North 9.2 mph - N/A   Mostly Cloudy
10:52 AM 55.9 °F - 46.9 °F 72% 30.17 in 10.0 mi NNW 10.4 mph - N/A   Overcast
11:52 AM 54.0 °F - 41.0 °F 62% 30.15 in 10.0 mi North 12.7 mph - N/A   Overcast
1:52 PM 51.1 °F - 39.0 °F 63% 30.17 in 10.0 mi North 15.0 mph - 0.00 in   Overcast
2:52 PM 51.8 °F - 37.4 °F 58% 30.17 in 10.0 mi North 11.5 mph - N/A   Overcast
3:52 PM 51.1 °F - 36.0 °F 56% 30.20 in 10.0 mi North 11.5 mph - N/A   Overcast
4:52 PM 50.0 °F - 35.1 °F 57% 30.21 in 10.0 mi NNW 5.8 mph - N/A   Overcast
5:52 PM 50.0 °F - 35.1 °F 57% 30.23 in 10.0 mi North 9.2 mph - N/A   Overcast
6:52 PM 48.9 °F - 34.0 °F 56% 30.27 in 10.0 mi NNW 9.2 mph - N/A   Overcast
7:52 PM 46.0 °F 41.9 °F 36.0 °F 68% 30.29 in 10.0 mi North 8.1 mph - 0.00 in Rain Light Rain
8:20 PM 44.6 °F 39.7 °F 37.4 °F 76% 30.29 in 5.0 mi NNW 9.2 mph - 0.02 in Rain Light Rain
8:52 PM 43.0 °F 37.7 °F 36.0 °F 76% 30.30 in 5.0 mi NNW 9.2 mph - 0.03 in Rain Light Rain
9:52 PM 41.0 °F 34.3 °F 39.0 °F 93% 30.30 in 5.0 mi NNW 11.5 mph - 0.03 in Rain Light Rain
10:52 PM 41.0 °F 34.7 °F 36.0 °F 82% 30.31 in 10.0 mi NNW 10.4 mph - 0.03 in Rain Light Rain
11:52 PM 39.9 °F 34.5 °F 34.0 °F 79% 30.31 in 10.0 mi North 8.1 mph - 0.03 in   Overcast