Dulles, VA

7:37 PM EST on January 24, 2017 (GMT -0500)
Washington Dulles International

Weather History for KIAD - January, 2013

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Thursday, January 3, 2013

  Actual Average Record
Temperature  
Mean Temperature 30 °F 33 °F  
Max Temperature 39 °F 42 °F 68 °F (2000)
Min Temperature 21 °F 24 °F 8 °F (1971)
Degree Days  
Heating Degree Days 35 32  
Month to date heating degree days 96 96  
Since 1 July heating degree days 1784 1894  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 17 °F    
Average Humidity 59    
Maximum Humidity 77    
Minimum Humidity 40    
Precipitation  
Precipitation 0.00 in 0.07 in 1.37 in (1999)
Month to date precipitation T 0.23  
Year to date precipitation T 0.23  
Snow  
Snow 0.00 in 0.20 in 0.90 in (1989)
Month to date snowfall T 0.5  
Since 1 July snowfall 2.2 4.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.21 in    
Wind  
Wind Speed 3 mph (SSW)    
Max Wind Speed 10 mph    
Max Gust Speed 13 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. 03, 2013 Rise Set
Actual Time 7:28 AM EST 5:00 PM EST
Civil Twilight 6:59 AM EST 5:30 PM EST
Nautical Twilight 6:25 AM EST 6:03 PM EST
Astronomical Twilight 5:53 AM EST 6:35 PM EST
Moon 11:29 PM EST (1/3) 10:42 AM EST (1/3)
Length of Visible Light 10h 31m
Length of Day
9h 31m
Waning Gibbous, 65% of the Moon is Illuminated
Jan 3
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
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 28.0 °F 20.8 °F 12.9 °F 53% 30.22 in 10.0 mi NE 6.9 mph - N/A   Mostly Cloudy
1:52 AM 26.6 °F - 15.8 °F 64% 30.21 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:52 AM 27.0 °F - 14.0 °F 58% 30.24 in 10.0 mi Calm Calm - N/A   Overcast
3:52 AM 27.0 °F - 17.1 °F 66% 30.22 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:52 AM 27.0 °F 21.6 °F 17.1 °F 66% 30.22 in 10.0 mi NNE 4.6 mph - N/A   Mostly Cloudy
5:52 AM 26.1 °F - 17.1 °F 69% 30.24 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
6:52 AM 21.9 °F - 16.0 °F 78% 30.25 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:52 AM 21.0 °F 16.2 °F 16.0 °F 81% 30.25 in 10.0 mi South 3.5 mph - N/A   Mostly Cloudy
8:52 AM 26.1 °F - 18.0 °F 71% 30.26 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:52 AM 30.0 °F - 16.0 °F 56% 30.27 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:52 AM 32.0 °F 27.5 °F 14.0 °F 48% 30.25 in 10.0 mi SW 4.6 mph - N/A   Overcast
11:52 AM 33.1 °F 26.9 °F 15.1 °F 48% 30.22 in 10.0 mi SW 6.9 mph - N/A   Clear
12:52 PM 35.1 °F 29.3 °F 16.0 °F 46% 30.18 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
1:52 PM 37.0 °F 32.4 °F 16.0 °F 42% 30.16 in 10.0 mi South 5.8 mph - N/A   Scattered Clouds
2:52 PM 37.0 °F 31.6 °F 16.0 °F 42% 30.17 in 10.0 mi SW 6.9 mph - N/A   Partly Cloudy
3:52 PM 37.9 °F 32.7 °F 17.1 °F 43% 30.17 in 10.0 mi SW 6.9 mph - N/A   Partly Cloudy
4:52 PM 34.0 °F 28.8 °F 17.1 °F 50% 30.18 in 10.0 mi South 5.8 mph - N/A   Partly Cloudy
5:52 PM 32.0 °F 28.7 °F 17.1 °F 54% 30.19 in 10.0 mi South 3.5 mph - N/A   Clear
6:52 PM 28.9 °F 23.9 °F 19.0 °F 67% 30.19 in 10.0 mi SSW 4.6 mph - N/A   Clear
7:52 PM 28.9 °F 25.2 °F 19.0 °F 67% 30.19 in 10.0 mi SSW 3.5 mph - N/A   Clear
8:52 PM 28.9 °F - 19.0 °F 67% 30.19 in 10.0 mi Calm Calm - N/A   Clear
9:52 PM 28.0 °F - 18.0 °F 66% 30.19 in 10.0 mi Calm Calm - N/A   Clear
10:52 PM 25.0 °F 19.3 °F 18.0 °F 75% 30.20 in 10.0 mi West 4.6 mph - N/A   Clear
11:52 PM 24.1 °F 19.7 °F 17.1 °F 75% 30.19 in 10.0 mi WSW 3.5 mph - N/A   Clear