Dulles Airport, VA

5:34 PM EDT on June 25, 2017 (GMT -0400)
Washington Dulles International

Weather History for KIAD - January, 2013

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Sunday, January 20, 2013

  Actual Average Record
Temperature  
Mean Temperature 47 °F 33 °F  
Max Temperature 58 °F 42 °F 63 °F (2006)
Min Temperature 35 °F 24 °F -7 °F (1985)
Degree Days  
Heating Degree Days 18 32  
Month to date heating degree days 508 640  
Since 1 July heating degree days 2196 2438  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 21 °F    
Average Humidity 45    
Maximum Humidity 70    
Minimum Humidity 20    
Precipitation  
Precipitation 0.00 in 0.09 in 1.01 in (1979)
Month to date precipitation 1.09 1.68  
Year to date precipitation 1.09 1.68  
Snow  
Snow 0.00 in 0.30 in 4.60 in (2000)
Month to date snowfall T 4.3  
Since 1 July snowfall 2.2 8.3  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.93 in    
Wind  
Wind Speed 12 mph (WSW)    
Max Wind Speed 29 mph    
Max Gust Speed 35 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Date:

Astronomy

Jan. 20, 2013 Rise Set
Actual Time 7:24 AM EST 5:17 PM EST
Civil Twilight 6:55 AM EST 5:46 PM EST
Nautical Twilight 6:23 AM EST 6:19 PM EST
Astronomical Twilight 5:51 AM EST 6:50 PM EST
Moon 12:17 PM EST (1/20) 1:55 AM EST (1/20)
Length of Visible Light 10h 50m
Length of Day
9h 53m
Waxing Gibbous, 66% of the Moon is Illuminated
Jan 20
Waxing Gibbous
Jan 26
Full
Feb 3
Last Quarter
Feb 10
New
Feb 17
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 43.0 °F 36.0 °F 26.1 °F 51% 29.94 in 10.0 mi SSW 13.8 mph - N/A   Clear
1:52 AM 42.1 °F 36.1 °F 26.1 °F 53% 29.93 in 10.0 mi SSW 10.4 mph - N/A   Clear
2:52 AM 41.0 °F 33.9 °F 26.1 °F 55% 29.91 in 10.0 mi SSW 12.7 mph - N/A   Clear
3:52 AM 39.0 °F 32.3 °F 27.0 °F 62% 29.89 in 10.0 mi SSW 10.4 mph - N/A   Clear
4:52 AM 37.9 °F 30.5 °F 27.0 °F 65% 29.88 in 10.0 mi South 11.5 mph - N/A   Clear
5:52 AM 37.0 °F 29.8 °F 27.0 °F 67% 29.87 in 10.0 mi SSW 10.4 mph - N/A   Clear
6:52 AM 36.0 °F 28.5 °F 26.1 °F 67% 29.87 in 10.0 mi South 10.4 mph - N/A   Clear
7:52 AM 36.0 °F 28.5 °F 27.0 °F 70% 29.86 in 10.0 mi SSW 10.4 mph - N/A   Partly Cloudy
8:52 AM 39.9 °F 32.5 °F 27.0 °F 60% 29.88 in 10.0 mi SSW 12.7 mph - N/A   Partly Cloudy
9:52 AM 46.0 °F 41.0 °F 28.0 °F 50% 29.89 in 10.0 mi SW 10.4 mph - N/A   Partly Cloudy
10:52 AM 52.0 °F - 30.0 °F 43% 29.87 in 10.0 mi SSW 5.8 mph - N/A   Scattered Clouds
11:52 AM 55.0 °F - 30.0 °F 38% 29.86 in 10.0 mi WSW 10.4 mph - N/A   Partly Cloudy
12:52 PM 57.9 °F - 24.1 °F 27% 29.84 in 10.0 mi WNW 19.6 mph 29.9 mph N/A   Partly Cloudy
1:52 PM 57.0 °F - 21.9 °F 26% 29.85 in 10.0 mi WNW 23.0 mph 34.5 mph N/A   Partly Cloudy
2:52 PM 55.9 °F - 21.9 °F 27% 29.88 in 10.0 mi WNW 18.4 mph 26.5 mph N/A   Partly Cloudy
3:52 PM 54.0 °F - 16.0 °F 22% 29.92 in 10.0 mi NW 13.8 mph 25.3 mph N/A   Partly Cloudy
4:52 PM 50.0 °F - 10.9 °F 21% 29.96 in 10.0 mi NW 19.6 mph 27.6 mph N/A   Partly Cloudy
5:52 PM 46.0 °F 40.6 °F 10.9 °F 24% 30.00 in 10.0 mi NW 11.5 mph - N/A   Partly Cloudy
6:52 PM 43.0 °F 37.2 °F 9.0 °F 25% 30.02 in 10.0 mi NW 10.4 mph - N/A   Clear
7:52 PM 42.1 °F 34.2 °F 7.0 °F 24% 30.04 in 10.0 mi NW 16.1 mph - N/A   Clear
8:52 PM 39.9 °F 32.5 °F 9.0 °F 28% 30.05 in 10.0 mi NW 12.7 mph - N/A   Clear
9:52 PM 37.9 °F 31.5 °F 9.0 °F 30% 30.06 in 10.0 mi NNW 9.2 mph - N/A   Clear
10:52 PM 37.0 °F 31.6 °F 10.0 °F 33% 30.08 in 10.0 mi NW 6.9 mph - N/A   Partly Cloudy
11:52 PM 35.1 °F 30.1 °F 12.9 °F 40% 30.09 in 10.0 mi NNE 5.8 mph - N/A   Partly Cloudy