Dulles Airport, VA

6:06 AM EDT on July 28, 2017 (GMT -0400)
Washington Dulles International

Weather History for KIAD - January, 2013

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Sunday, January 6, 2013

  Actual Average Record
Temperature  
Mean Temperature 39 °F 33 °F  
Max Temperature 51 °F 42 °F 71 °F (2007)
Min Temperature 27 °F 24 °F 4 °F (1977)
Degree Days  
Heating Degree Days 26 32  
Month to date heating degree days 182 192  
Since 1 July heating degree days 1870 1990  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 27 °F    
Average Humidity 65    
Maximum Humidity 92    
Minimum Humidity 38    
Precipitation  
Precipitation T in 0.08 in 0.94 in (1995)
Month to date precipitation T 0.48  
Year to date precipitation T 0.48  
Snow  
Snow T in 0.20 in 4.20 in (2015)
Month to date snowfall T 1.0  
Since 1 July snowfall 2.2 5.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.12 in    
Wind  
Wind Speed 5 mph (WSW)    
Max Wind Speed 16 mph    
Max Gust Speed 20 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. 06, 2013 Rise Set
Actual Time 7:28 AM EST 5:03 PM EST
Civil Twilight 6:59 AM EST 5:32 PM EST
Nautical Twilight 6:25 AM EST 6:05 PM EST
Astronomical Twilight 5:53 AM EST 6:38 PM EST
Moon 1:42 AM EST (1/6) 12:28 PM EST (1/6)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Waning Crescent, 33% of the Moon is Illuminated
Jan 6
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 39.0 °F 34.8 °F 27.0 °F 62% 30.18 in 10.0 mi South 5.8 mph - N/A   Overcast
1:52 AM 37.9 °F 33.5 °F 28.9 °F 70% 30.19 in 10.0 mi North 5.8 mph - 0.00 in   Overcast
2:52 AM 37.0 °F 33.3 °F 28.9 °F 73% 30.14 in 10.0 mi ESE 4.6 mph - 0.00 in   Overcast
3:52 AM 34.0 °F 31.0 °F 28.9 °F 82% 30.15 in 10.0 mi West 3.5 mph - N/A   Mostly Cloudy
4:52 AM 30.9 °F - 27.0 °F 85% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:52 AM 30.9 °F - 27.0 °F 85% 30.13 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:52 AM 28.4 °F - 24.8 °F 86% 30.14 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:52 AM 27.0 °F - 25.0 °F 92% 30.15 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:52 AM 35.1 °F - 30.0 °F 82% 30.15 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:52 AM 37.9 °F 35.5 °F 28.9 °F 70% 30.16 in 10.0 mi South 3.5 mph - N/A   Partly Cloudy
10:52 AM 44.1 °F 42.5 °F 27.0 °F 51% 30.14 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
11:52 AM 46.9 °F - 27.0 °F 46% 30.10 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
12:52 PM 48.9 °F - 26.1 °F 41% 30.06 in 10.0 mi SSW 8.1 mph - N/A   Overcast
1:52 PM 51.1 °F - 27.0 °F 39% 30.04 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
2:52 PM 50.0 °F - 26.1 °F 39% 30.04 in 10.0 mi SW 10.4 mph - N/A   Mostly Cloudy
3:52 PM 48.9 °F - 26.1 °F 41% 30.04 in 10.0 mi WSW 8.1 mph - N/A   Overcast
4:52 PM 46.9 °F - 25.0 °F 42% 30.05 in 10.0 mi WSW 6.9 mph - N/A   Overcast
5:52 PM 46.9 °F - 25.0 °F 42% 30.06 in 10.0 mi West 3.5 mph - N/A   Overcast
6:52 PM 45.0 °F 40.6 °F 27.0 °F 49% 30.08 in 10.0 mi WNW 8.1 mph - N/A   Overcast
7:52 PM 45.0 °F 41.2 °F 27.0 °F 49% 30.10 in 10.0 mi WNW 6.9 mph - N/A   Overcast
8:52 PM 45.0 °F 40.1 °F 27.0 °F 49% 30.11 in 10.0 mi WNW 9.2 mph - N/A   Overcast
9:52 PM 43.0 °F 39.5 °F 26.1 °F 51% 30.11 in 10.0 mi SW 5.8 mph - N/A   Overcast
10:52 PM 41.0 °F 39.0 °F 26.1 °F 55% 30.13 in 10.0 mi WNW 3.5 mph - N/A   Overcast
11:52 PM 39.9 °F 36.7 °F 27.0 °F 60% 30.15 in 10.0 mi NW 4.6 mph - N/A   Overcast