Dulles Airport, VA

8:00 PM EDT on May 29, 2017 (GMT -0400)
Washington Dulles International

Weather History for KIAD - December, 2012

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Thursday, December 27, 2012

  Actual Average Record
Temperature  
Mean Temperature 38 °F 34 °F  
Max Temperature 41 °F 43 °F 73 °F (1971)
Min Temperature 34 °F 25 °F 1 °F (1989)
Degree Days  
Heating Degree Days 27 31  
Month to date heating degree days 588 758  
Since 1 July heating degree days 1567 1674  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1436 1178  
Moisture  
Dew Point 28 °F    
Average Humidity 78    
Maximum Humidity 96    
Minimum Humidity 59    
Precipitation  
Precipitation 0.01 in 0.08 in 1.04 in (1964)
Month to date precipitation 2.78 2.65  
Year to date precipitation 35.53 41.23  
Snow  
Snow 0.00 in 0.10 in 4.40 in (1990)
Month to date snowfall 1.3 2.9  
Since 1 July snowfall 1.3 3.4  
Snow Depth T in    
Sea Level Pressure  
Sea Level Pressure 29.73 in    
Wind  
Wind Speed 19 mph (WNW)    
Max Wind Speed 37 mph    
Max Gust Speed 46 mph    
Visibility 9 miles    
Events Rain    
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

Dec. 27, 2012 Rise Set
Actual Time 7:27 AM EST 4:54 PM EST
Civil Twilight 6:57 AM EST 5:24 PM EST
Nautical Twilight 6:24 AM EST 5:58 PM EST
Astronomical Twilight 5:51 AM EST 6:30 PM EST
Moon 4:36 PM EST (12/27) 6:37 AM EST (12/27)
Length of Visible Light 10h 27m
Length of Day
9h 27m
Full, 100% of the Moon is Illuminated
Dec 27
Full
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:37 AM 33.8 °F 23.5 °F 32.0 °F 93% 29.46 in 6.0 mi NW 16.1 mph 23.0 mph 0.00 in   Light Drizzle
12:52 AM 34.0 °F 23.8 °F 32.0 °F 92% 29.46 in 5.0 mi NW 16.1 mph - 0.00 in   Light Drizzle
12:59 AM 33.8 °F 23.5 °F 32.0 °F 93% 29.45 in 5.0 mi NW 16.1 mph 24.2 mph 0.00 in   Light Drizzle
1:52 AM 35.1 °F 26.4 °F 33.1 °F 92% 29.47 in 7.0 mi NW 12.7 mph - 0.01 in   Overcast
2:28 AM 35.6 °F 26.6 °F 33.8 °F 93% 29.49 in 10.0 mi WNW 13.8 mph - N/A   Overcast
2:52 AM 35.1 °F 24.5 °F 32.0 °F 89% 29.50 in 7.0 mi WNW 18.4 mph 25.3 mph N/A   Overcast
3:52 AM 35.1 °F 25.9 °F 30.9 °F 85% 29.53 in 10.0 mi NW 13.8 mph 20.7 mph N/A   Overcast
3:54 AM 35.6 °F 26.6 °F 30.2 °F 81% 29.52 in 10.0 mi NW 13.8 mph 20.7 mph N/A   Overcast
4:46 AM 35.6 °F 29.2 °F 30.2 °F 81% 29.55 in 10.0 mi NW 8.1 mph - N/A   Overcast
4:52 AM 36.0 °F 27.5 °F 30.0 °F 79% 29.56 in 10.0 mi NW 12.7 mph 17.3 mph N/A   Overcast
5:52 AM 36.0 °F 28.0 °F 30.0 °F 79% 29.59 in 10.0 mi NW 11.5 mph - N/A   Mostly Cloudy
6:52 AM 37.0 °F 25.6 °F 28.9 °F 73% 29.62 in 10.0 mi WNW 24.2 mph 36.8 mph N/A   Overcast
7:52 AM 37.0 °F 25.1 °F 27.0 °F 67% 29.66 in 10.0 mi NW 26.5 mph 33.4 mph N/A   Mostly Cloudy
8:52 AM 37.0 °F 24.9 °F 27.0 °F 67% 29.71 in 10.0 mi WNW 27.6 mph 34.5 mph N/A   Mostly Cloudy
9:52 AM 37.9 °F 27.1 °F 27.0 °F 65% 29.76 in 10.0 mi WNW 23.0 mph 34.5 mph N/A   Overcast
10:52 AM 37.9 °F 26.3 °F 27.0 °F 65% 29.78 in 10.0 mi WNW 26.5 mph 38.0 mph N/A   Overcast
11:52 AM 39.9 °F 28.8 °F 26.1 °F 58% 29.79 in 10.0 mi NW 27.6 mph 40.3 mph N/A   Mostly Cloudy
12:52 PM 37.9 °F 28.2 °F 26.1 °F 62% 29.81 in 10.0 mi WNW 18.4 mph 26.5 mph N/A   Overcast
1:52 PM 37.9 °F 26.8 °F 25.0 °F 60% 29.82 in 10.0 mi WNW 24.2 mph 35.7 mph N/A   Overcast
2:52 PM 37.0 °F 25.6 °F 24.1 °F 59% 29.86 in 10.0 mi WNW 24.2 mph 29.9 mph N/A   Overcast
3:52 PM 36.0 °F 23.9 °F 24.1 °F 62% 29.88 in 10.0 mi WNW 25.3 mph 34.5 mph N/A   Mostly Cloudy
4:52 PM 36.0 °F 25.3 °F 24.1 °F 62% 29.91 in 10.0 mi WNW 19.6 mph 27.6 mph N/A   Overcast
5:52 PM 36.0 °F 27.5 °F 24.1 °F 62% 29.95 in 10.0 mi WNW 12.7 mph 23.0 mph N/A   Mostly Cloudy
6:52 PM 36.0 °F 26.0 °F 25.0 °F 64% 29.96 in 10.0 mi WNW 17.3 mph 20.7 mph N/A   Overcast
7:52 PM 36.0 °F 24.7 °F 25.0 °F 64% 29.97 in 10.0 mi WNW 21.9 mph 29.9 mph N/A   Overcast
8:52 PM 35.1 °F 24.8 °F 25.0 °F 67% 29.98 in 10.0 mi WNW 17.3 mph 26.5 mph N/A   Scattered Clouds
9:52 PM 35.1 °F 24.8 °F 25.0 °F 67% 30.01 in 10.0 mi WNW 17.3 mph - N/A   Overcast
10:52 PM 36.0 °F 26.3 °F 26.1 °F 67% 30.02 in 10.0 mi WNW 16.1 mph - N/A   Mostly Cloudy
11:52 PM 36.0 °F 28.5 °F 26.1 °F 67% 30.03 in 10.0 mi WNW 10.4 mph - N/A   Overcast