Dulles Airport, VA

1:35 AM EST on January 24, 2018 (GMT -0500)
Washington Dulles International

Weather History for KIAD - January, 2014

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Friday, January 17, 2014

  Actual Average Record
Temperature  
Mean Temperature 37 °F 33 °F  
Max Temperature 47 °F 42 °F 70 °F (1990)
Min Temperature 27 °F 24 °F -7 °F (1982)
Degree Days  
Heating Degree Days 28 32  
Month to date heating degree days 574 544  
Since 1 July heating degree days 2331 2342  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 23 °F    
Average Humidity 60    
Maximum Humidity 81    
Minimum Humidity 38    
Precipitation  
Precipitation 0.00 in 0.09 in 1.14 in (1994)
Month to date precipitation 2.12 1.42  
Year to date precipitation 2.12 1.42  
Snow  
Snow 0.00 in 0.30 in 4.20 in (1965)
Month to date snowfall 3.0 3.5  
Since 1 July snowfall 7.7 7.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.90 in    
Wind  
Wind Speed 5 mph (South)    
Max Wind Speed 12 mph    
Max Gust Speed 17 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. 17, 2014 Rise Set
Actual Time 7:26 AM EST 5:14 PM EST
Civil Twilight 6:57 AM EST 5:43 PM EST
Nautical Twilight 6:24 AM EST 6:15 PM EST
Astronomical Twilight 5:52 AM EST 6:47 PM EST
Moon 6:57 PM EST (1/17) 7:54 AM EST (1/17)
Length of Visible Light 10h 46m
Length of Day
9h 47m
Full, 98% of the Moon is Illuminated
Jan 17
Full
Jan 24
Last Quarter
Jan 30
New
Feb 6
First Quarter
Feb 14
Full

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 32.0 °F 25.6 °F 23.0 °F 69% 29.94 in 10.0 mi South 6.9 mph - N/A   Overcast
1:52 AM 30.0 °F 25.2 °F 23.0 °F 75% 29.93 in 10.0 mi South 4.6 mph - N/A   Overcast
2:52 AM 30.9 °F 22.8 °F 24.1 °F 76% 29.92 in 10.0 mi SSW 9.2 mph - N/A   Overcast
3:52 AM 30.0 °F 26.5 °F 23.0 °F 75% 29.91 in 10.0 mi SSW 3.5 mph - N/A   Scattered Clouds
4:52 AM 28.9 °F 20.4 °F 21.9 °F 75% 29.92 in 10.0 mi SSW 9.2 mph - N/A   Partly Cloudy
5:52 AM 27.0 °F 23.0 °F 21.0 °F 78% 29.93 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy
6:52 AM 27.0 °F 23.0 °F 21.0 °F 78% 29.93 in 10.0 mi SSW 3.5 mph - N/A   Clear
7:52 AM 27.0 °F - 21.0 °F 78% 29.94 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:52 AM 30.0 °F 25.2 °F 21.9 °F 72% 29.95 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
9:52 AM 34.0 °F 31.0 °F 21.0 °F 59% 29.96 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy
10:52 AM 37.0 °F 33.3 °F 21.9 °F 54% 29.96 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
11:47 AM 15.8 °F 2.7 °F 6.8 °F 68% 29.88 in 10.0 mi West 11.5 mph 23.0 mph N/A   Scattered Clouds
11:52 AM 41.0 °F 38.0 °F 23.0 °F 49% 29.94 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
12:52 PM 45.0 °F 41.8 °F 24.1 °F 44% 29.90 in 10.0 mi SSW 5.8 mph - N/A   Scattered Clouds
1:52 PM 46.9 °F - 24.1 °F 41% 29.86 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
2:52 PM 46.9 °F - 24.1 °F 41% 29.86 in 10.0 mi SSE 9.2 mph - N/A   Mostly Cloudy
3:52 PM 46.0 °F 42.5 °F 23.0 °F 40% 29.86 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
4:52 PM 43.0 °F 38.2 °F 25.0 °F 49% 29.87 in 10.0 mi SE 8.1 mph - N/A   Mostly Cloudy
5:52 PM 41.0 °F 37.1 °F 26.1 °F 55% 29.87 in 10.0 mi East 5.8 mph - N/A   Mostly Cloudy
6:52 PM 39.9 °F 35.8 °F 27.0 °F 60% 29.88 in 10.0 mi ESE 5.8 mph - N/A   Mostly Cloudy
7:52 PM 39.0 °F 36.8 °F 27.0 °F 62% 29.88 in 10.0 mi ESE 3.5 mph - N/A   Mostly Cloudy
8:52 PM 37.9 °F - 28.0 °F 68% 29.86 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:52 PM 36.0 °F - 28.0 °F 73% 29.85 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:52 PM 34.0 °F - 27.0 °F 75% 29.83 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:52 PM 32.0 °F 27.5 °F 28.0 °F 85% 29.84 in 10.0 mi West 4.6 mph - N/A   Overcast