Weather History for Dulles Airport, VA

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Saturday, January 30, 2010

  Actual Average Record
Temperature  
Mean Temperature 19 °F 34 °F  
Max Temperature 21 °F 43 °F 72 °F (2013)
Min Temperature 17 °F 24 °F 2 °F (1965)
Degree Days  
Heating Degree Days 46 31  
Month to date heating degree days 930 956  
Since 1 July heating degree days 2581 2754  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 9 °F    
Average Humidity 61    
Maximum Humidity 80    
Minimum Humidity 41    
Precipitation  
Precipitation 0.18 in 0.09 in 2.00 in (2013)
Month to date precipitation 1.92 2.58  
Year to date precipitation 1.92 2.58  
Snow  
Snow 4.50 in 0.30 in 6.30 in (2000)
Month to date snowfall 5.7 7.0  
Since 1 July snowfall 27.1 11.0  
Snow Depth 5.00 in    
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 10 mph (North)    
Max Wind Speed 16 mph    
Max Gust Speed 22 mph    
Visibility 3 miles    
Events Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 30, 2010 Rise Set
Actual Time 7:17 AM EST 5:28 PM EST
Civil Twilight 6:49 AM EST 5:57 PM EST
Nautical Twilight 6:17 AM EST 6:29 PM EST
Astronomical Twilight 5:46 AM EST 7:00 PM EST
Moon 6:21 PM EST (1/30) 7:23 AM EST (1/30)
Length of Visible Light 11h 07m
Length of Day
10h 10m
Full, 100% of the Moon is Illuminated
Jan 30
Full
Feb 5
Last Quarter
Feb 13
New
Feb 21
First Quarter
Feb 28
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 21.0 °F 10.6 °F 1.9 °F 44% 30.36 in 10.0 mi NNW 9.2 mph - N/A   Overcast
1:52 AM 19.9 °F 10.1 °F 1.9 °F 46% 30.35 in 10.0 mi North 8.1 mph - N/A   Overcast
2:52 AM 19.9 °F 7.3 °F 1.9 °F 46% 30.33 in 10.0 mi North 12.7 mph - N/A   Overcast
3:52 AM 19.9 °F 9.3 °F 1.9 °F 46% 30.32 in 10.0 mi North 9.2 mph - N/A   Overcast
4:52 AM 19.9 °F 11.1 °F 1.9 °F 46% 30.29 in 10.0 mi North 6.9 mph - N/A   Overcast
5:52 AM 19.9 °F 9.3 °F 1.9 °F 46% 30.29 in 10.0 mi North 9.2 mph - N/A   Overcast
6:52 AM 19.9 °F 8.6 °F 1.9 °F 46% 30.26 in 10.0 mi NNE 10.4 mph - N/A   Overcast
7:52 AM 19.9 °F 9.3 °F 3.0 °F 48% 30.24 in 10.0 mi NE 9.2 mph - N/A   Overcast
8:52 AM 19.9 °F 11.1 °F 1.9 °F 46% 30.25 in 10.0 mi NNE 6.9 mph - N/A   Overcast
9:24 AM 21.2 °F 11.7 °F 3.2 °F 46% 30.22 in 2.0 mi NE 8.1 mph - 0.00 in Snow Light Snow
9:40 AM 19.4 °F 8.6 °F 8.6 °F 63% 30.23 in 1.2 mi NE 9.2 mph - 0.00 in Snow Light Snow
9:50 AM 19.4 °F 8.6 °F 10.4 °F 68% 30.22 in 0.8 mi NE 9.2 mph - 0.00 in Snow Light Snow
9:52 AM 19.0 °F 8.2 °F 10.0 °F 68% 30.24 in 0.8 mi NNE 9.2 mph - 0.00 in Snow Light Snow
10:07 AM 17.6 °F 9.3 °F 12.2 °F 79% 30.23 in 0.2 mi NNE 5.8 mph - 0.01 in Snow Snow
10:52 AM 18.0 °F 12.7 °F 12.9 °F 81% 30.25 in 0.2 mi NE 3.5 mph - 0.05 in Snow Snow
11:38 AM 19.4 °F 10.4 °F 12.2 °F 74% 30.22 in 1.0 mi NNE 6.9 mph - 0.03 in Snow Light Snow
11:48 AM 19.4 °F 11.5 °F 12.2 °F 74% 30.21 in 0.8 mi North 5.8 mph - 0.04 in Snow Light Snow
11:52 AM 19.0 °F 10.0 °F 12.9 °F 77% 30.23 in 0.8 mi North 6.9 mph - 0.04 in Snow Light Snow
12:15 PM 17.6 °F 6.4 °F 12.2 °F 79% 30.19 in 0.5 mi North 9.2 mph - 0.01 in Snow Light Snow
12:36 PM 17.6 °F 6.4 °F 12.2 °F 79% 30.19 in 1.0 mi NNW 9.2 mph - 0.03 in Snow Light Snow
12:52 PM 18.0 °F 5.4 °F 12.0 °F 78% 30.18 in 1.0 mi North 11.5 mph - 0.03 in Snow Light Snow
1:15 PM 17.6 °F 7.3 °F 12.2 °F 79% 30.15 in 0.5 mi North 8.1 mph - 0.01 in Snow Snow
1:52 PM 18.0 °F 6.9 °F 12.0 °F 78% 30.14 in 0.5 mi North 9.2 mph - 0.02 in Snow Light Snow
2:20 PM 17.6 °F 5.0 °F 12.2 °F 79% 30.12 in 0.2 mi North 11.5 mph - 0.01 in Snow Snow
2:52 PM 17.1 °F 3.6 °F 12.0 °F 81% 30.12 in 0.5 mi North 12.7 mph - 0.03 in Snow Snow
3:52 PM 17.1 °F 3.0 °F 10.9 °F 77% 30.09 in 0.5 mi North 13.8 mph - 0.03 in Snow Snow
4:35 PM 17.6 °F 5.0 °F 10.4 °F 73% 30.07 in 1.0 mi North 11.5 mph - 0.01 in Snow Light Snow
4:52 PM 17.1 °F 2.0 °F 10.9 °F 77% 30.08 in 1.0 mi North 16.1 mph 21.9 mph 0.02 in Snow Light Snow
5:52 PM 17.1 °F 3.6 °F 10.0 °F 74% 30.07 in 2.0 mi North 12.7 mph - 0.00 in Snow Light Snow
6:03 PM 17.6 °F 4.3 °F 10.4 °F 73% 30.05 in 3.0 mi North 12.7 mph - 0.00 in Snow Light Snow
6:47 PM 17.6 °F 5.0 °F 10.4 °F 73% 30.05 in 2.0 mi North 11.5 mph - 0.00 in Snow Light Snow
6:52 PM 17.1 °F 4.3 °F 10.9 °F 77% 30.06 in 1.5 mi North 11.5 mph - 0.00 in Snow Light Snow
7:26 PM 17.6 °F 3.7 °F 10.4 °F 73% 30.05 in 1.2 mi NNW 13.8 mph - 0.00 in Snow Light Snow
7:42 PM 17.6 °F 4.3 °F 10.4 °F 73% 30.05 in 1.8 mi North 12.7 mph 19.6 mph 0.00 in Snow Light Snow
7:52 PM 17.1 °F 4.3 °F 10.9 °F 77% 30.07 in 2.0 mi North 11.5 mph - 0.00 in Snow Light Snow
8:12 PM 17.6 °F 5.0 °F 10.4 °F 73% 30.05 in 3.0 mi North 11.5 mph - 0.00 in Snow Light Snow
8:31 PM 17.6 °F 5.0 °F 10.4 °F 73% 30.04 in 1.5 mi North 11.5 mph - 0.00 in Snow Light Snow
8:52 PM 18.0 °F 4.8 °F 10.9 °F 74% 30.06 in 3.0 mi North 12.7 mph - 0.00 in Snow Light Snow
9:07 PM 17.6 °F 7.3 °F 12.2 °F 79% 30.04 in 1.8 mi North 8.1 mph - 0.00 in Snow Light Snow
9:25 PM 17.6 °F 5.7 °F 10.4 °F 73% 30.04 in 2.0 mi NNW 10.4 mph - 0.00 in Snow Light Snow
9:42 PM 17.6 °F 6.4 °F 10.4 °F 73% 30.04 in 1.5 mi NNW 9.2 mph - 0.00 in Snow Light Snow
9:52 PM 18.0 °F 5.4 °F 10.9 °F 74% 30.05 in 1.2 mi NNW 11.5 mph 17.3 mph 0.00 in Snow Light Snow
10:12 PM 17.6 °F 6.4 °F 12.2 °F 79% 30.03 in 1.2 mi NNW 9.2 mph - 0.00 in Snow Light Snow
10:31 PM 17.6 °F 5.7 °F 12.2 °F 79% 30.04 in 2.0 mi NNW 10.4 mph - 0.00 in Snow Light Snow
10:52 PM 18.0 °F 7.7 °F 10.9 °F 74% 30.06 in 2.5 mi NNW 8.1 mph - 0.00 in Snow Light Snow
11:14 PM 17.6 °F 8.2 °F 10.4 °F 73% 30.04 in 3.0 mi NW 6.9 mph - 0.00 in Snow Light Snow
11:24 PM 17.6 °F 8.2 °F 10.4 °F 73% 30.05 in 5.0 mi NW 6.9 mph - 0.00 in   Haze
11:52 PM 19.0 °F 11.1 °F 10.0 °F 68% 30.06 in 10.0 mi NW 5.8 mph - 0.00 in   Overcast