Weather History for Washington, DC

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Wednesday, December 14, 2011

  Actual Average Record
Temperature  
Mean Temperature 44 °F 40 °F  
Max Temperature 50 °F 47 °F 70 °F (1931)
Min Temperature 38 °F 33 °F 6 °F (1904)
Degree Days  
Heating Degree Days 21 25  
Month to date heating degree days 291 324  
Since 1 July heating degree days 886 1019  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1925 1549  
Moisture  
Dew Point 33 °F    
Average Humidity 69    
Maximum Humidity 85    
Minimum Humidity 52    
Precipitation  
Precipitation T in 0.10 in 1.89 in (1879)
Month to date precipitation 3.34 1.49  
Year to date precipitation 45.33 38.18  
Snow  
Snow 0.00 in 0.10 in 3.60 in (2003)
Month to date snowfall T 0.9  
Since 1 July snowfall T 1.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.39 in    
Wind  
Wind Speed 3 mph (South)    
Max Wind Speed 8 mph    
Max Gust Speed 9 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 14, 2011 Rise Set
Actual Time 7:18 AM EST 4:46 PM EST
Civil Twilight 6:48 AM EST 5:16 PM EST
Nautical Twilight 6:15 AM EST 5:50 PM EST
Astronomical Twilight 5:42 AM EST 6:22 PM EST
Moon 9:02 PM EST (12/14) 10:03 AM EST (12/14)
Length of Visible Light 10h 28m
Length of Day
9h 28m
Waning Gibbous, 83% of the Moon is Illuminated
Dec 14
Waning Gibbous
Dec 17
Last Quarter
Dec 24
New
Jan 1
First Quarter
Jan 9
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 39.0 °F - 32.0 °F 76% 30.40 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:52 AM 39.9 °F - 32.0 °F 73% 30.43 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:52 AM 41.0 °F - 30.9 °F 67% 30.43 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:52 AM 39.9 °F - 32.0 °F 73% 30.41 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:52 AM 39.9 °F - 34.0 °F 79% 30.41 in 10.0 mi Calm Calm - N/A   Overcast
5:52 AM 39.9 °F - 35.1 °F 83% 30.41 in 10.0 mi Calm Calm - N/A   Overcast
6:52 AM 41.0 °F - 33.1 °F 73% 30.42 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:52 AM 39.9 °F - 35.1 °F 83% 30.43 in 8.0 mi Calm Calm - N/A   Overcast
8:52 AM 42.1 °F - 32.0 °F 67% 30.43 in 10.0 mi Calm Calm - N/A   Overcast
9:20 AM 42.8 °F - 30.2 °F 61% 30.45 in 10.0 mi Calm Calm - N/A   Overcast
9:52 AM 45.0 °F - 30.9 °F 58% 30.44 in 10.0 mi Calm Calm - N/A   Overcast
10:52 AM 46.0 °F - 30.9 °F 56% 30.45 in 10.0 mi Calm Calm - N/A   Overcast
11:52 AM 48.0 °F - 34.0 °F 58% 30.41 in 10.0 mi South 3.5 mph - N/A   Overcast
12:52 PM 48.9 °F - 33.1 °F 54% 30.38 in 10.0 mi SSW 4.6 mph - N/A   Overcast
1:52 PM 50.0 °F - 33.1 °F 52% 30.38 in 10.0 mi South 3.5 mph - N/A   Overcast
2:52 PM 50.0 °F - 34.0 °F 54% 30.36 in 10.0 mi South 3.5 mph - N/A   Overcast
3:52 PM 50.0 °F - 33.1 °F 52% 30.36 in 10.0 mi SSW 4.6 mph - 0.00 in   Overcast
4:52 PM 48.9 °F - 34.0 °F 56% 30.37 in 10.0 mi SSW 4.6 mph - N/A   Overcast
5:52 PM 48.0 °F - 35.1 °F 61% 30.37 in 10.0 mi South 6.9 mph - N/A   Overcast
6:52 PM 48.0 °F - 35.1 °F 61% 30.36 in 10.0 mi South 4.6 mph - N/A   Overcast
7:52 PM 46.9 °F - 35.1 °F 63% 30.36 in 10.0 mi South 4.6 mph - N/A   Overcast
8:52 PM 46.9 °F - 35.1 °F 63% 30.35 in 10.0 mi South 6.9 mph - N/A   Overcast
9:52 PM 46.0 °F 42.5 °F 35.1 °F 66% 30.33 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
10:52 PM 45.0 °F 41.2 °F 36.0 °F 71% 30.31 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
11:52 PM 44.1 °F 40.1 °F 36.0 °F 73% 30.30 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy