Dulles Airport, VA

3:31 PM EST on December 17, 2017 (GMT -0500)
Washington Dulles International

Weather History for KIAD - January, 2013

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Tuesday, January 8, 2013

  Actual Average Record
Temperature  
Mean Temperature 38 °F 33 °F  
Max Temperature 53 °F 42 °F 70 °F (2008)
Min Temperature 23 °F 24 °F -4 °F (1970)
Degree Days  
Heating Degree Days 27 32  
Month to date heating degree days 239 256  
Since 1 July heating degree days 1927 2054  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 28 °F    
Average Humidity 66    
Maximum Humidity 88    
Minimum Humidity 44    
Precipitation  
Precipitation 0.00 in 0.08 in 1.07 in (1978)
Month to date precipitation T 0.65  
Year to date precipitation T 0.65  
Snow  
Snow 0.00 in 0.20 in 4.70 in (1990)
Month to date snowfall T 1.4  
Since 1 July snowfall 2.2 5.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.39 in    
Wind  
Wind Speed 4 mph (South)    
Max Wind Speed 12 mph    
Max Gust Speed 15 mph    
Visibility 10 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

Jan. 08, 2013 Rise Set
Actual Time 7:28 AM EST 5:04 PM EST
Civil Twilight 6:59 AM EST 5:34 PM EST
Nautical Twilight 6:25 AM EST 6:07 PM EST
Astronomical Twilight 5:53 AM EST 6:39 PM EST
Moon 3:59 AM EST (1/8) 2:05 PM EST (1/8)
Length of Visible Light 10h 35m
Length of Day
9h 36m
Waning Crescent, 14% of the Moon is Illuminated
Jan 8
Waning Crescent
Jan 11
New
Jan 18
First Quarter
Jan 26
Full
Feb 3
Last 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 25.0 °F - 21.0 °F 85% 30.41 in 9.0 mi Calm Calm - N/A   Clear
1:52 AM 24.1 °F 19.7 °F 21.0 °F 88% 30.40 in 8.0 mi South 3.5 mph - N/A   Clear
2:52 AM 26.1 °F 19.4 °F 21.0 °F 81% 30.39 in 9.0 mi SSE 5.8 mph - N/A   Clear
3:52 AM 27.0 °F 21.6 °F 23.0 °F 85% 30.38 in 9.0 mi South 4.6 mph - N/A   Clear
4:52 AM 28.0 °F 24.2 °F 23.0 °F 81% 30.39 in 10.0 mi SSW 3.5 mph - N/A   Clear
5:52 AM 30.9 °F 23.5 °F 25.0 °F 79% 30.39 in 10.0 mi SSW 8.1 mph - N/A   Clear
6:52 AM 30.9 °F 25.2 °F 26.1 °F 82% 30.40 in 10.0 mi WSW 5.8 mph - N/A   Clear
7:52 AM 28.9 °F - 25.0 °F 85% 30.42 in 9.0 mi Calm Calm - N/A   Clear
8:52 AM 33.1 °F 28.7 °F 28.0 °F 82% 30.43 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
9:52 AM 37.9 °F 32.1 °F 30.0 °F 73% 30.42 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
10:52 AM 42.1 °F 38.4 °F 30.0 °F 62% 30.42 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
11:52 AM 44.1 °F 40.1 °F 30.9 °F 60% 30.40 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
12:52 PM 46.9 °F - 30.0 °F 52% 30.38 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
1:52 PM 50.0 °F - 30.9 °F 48% 30.37 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
2:52 PM 51.1 °F - 30.0 °F 44% 30.38 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
3:52 PM 52.0 °F - 30.0 °F 43% 30.37 in 10.0 mi East 3.5 mph - N/A   Scattered Clouds
4:52 PM 48.0 °F - 30.9 °F 52% 30.38 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:52 PM 43.0 °F - 30.0 °F 60% 30.38 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:52 PM 37.0 °F - 30.0 °F 76% 30.40 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:52 PM 36.0 °F 31.1 °F 28.9 °F 76% 30.39 in 10.0 mi South 5.8 mph - N/A   Partly Cloudy
8:52 PM 36.0 °F 31.1 °F 30.0 °F 79% 30.40 in 10.0 mi SSW 5.8 mph - N/A   Clear
9:52 PM 36.0 °F 33.3 °F 28.9 °F 76% 30.39 in 10.0 mi SSE 3.5 mph - N/A   Clear
10:52 PM 35.1 °F 31.0 °F 30.0 °F 82% 30.39 in 10.0 mi South 4.6 mph - N/A   Clear
11:52 PM 35.1 °F - 28.9 °F 78% 30.38 in 10.0 mi Calm Calm - N/A   Clear