Weather History for Washington, DC

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Sunday, December 23, 2012

  Actual Average Record
Temperature  
Mean Temperature 38 °F 38 °F  
Max Temperature 47 °F 45 °F 71 °F (1990)
Min Temperature 29 °F 31 °F 7 °F (1989)
Degree Days  
Heating Degree Days 27 27  
Month to date heating degree days 393 561  
Since 1 July heating degree days 1104 1256  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1975 1549  
Moisture  
Dew Point 21 °F    
Average Humidity 51    
Maximum Humidity 70    
Minimum Humidity 31    
Precipitation  
Precipitation 0.00 in 0.09 in 1.30 in (1907)
Month to date precipitation 1.27 2.34  
Year to date precipitation 30.69 39.03  
Snow  
Snow 0.00 in 0.00 in 5.60 in (1963)
Month to date snowfall 0.0 1.5  
Since 1 July snowfall T 2.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.01 in    
Wind  
Wind Speed 5 mph (SW)    
Max Wind Speed 15 mph    
Max Gust Speed 20 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 23, 2012 Rise Set
Actual Time 7:24 AM EST 4:50 PM EST
Civil Twilight 6:54 AM EST 5:20 PM EST
Nautical Twilight 6:20 AM EST 5:54 PM EST
Astronomical Twilight 5:48 AM EST 6:26 PM EST
Moon 1:39 PM EST (12/23) 3:05 AM EST (12/23)
Length of Visible Light 10h 26m
Length of Day
9h 26m
Waxing Gibbous, 81% of the Moon is Illuminated
Dec 23
Waxing Gibbous
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
12:52 AM 35.1 °F 28.6 °F 18.0 °F 50% 30.05 in 10.0 mi WNW 8.1 mph 18.4 mph N/A   Partly Cloudy
1:52 AM 34.0 °F 28.0 °F 18.0 °F 52% 30.06 in 10.0 mi WNW 6.9 mph - N/A   Clear
2:52 AM 34.0 °F 28.8 °F 17.1 °F 50% 30.08 in 10.0 mi NW 5.8 mph - N/A   Clear
3:52 AM 34.0 °F 28.8 °F 16.0 °F 48% 30.07 in 10.0 mi WNW 5.8 mph - N/A   Clear
4:52 AM 33.1 °F - 17.1 °F 52% 30.07 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:52 AM 32.0 °F 28.7 °F 21.9 °F 66% 30.07 in 10.0 mi SSW 3.5 mph - N/A   Clear
6:52 AM 30.9 °F 27.5 °F 19.9 °F 64% 30.08 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy
7:52 AM 28.9 °F 23.9 °F 19.9 °F 69% 30.09 in 10.0 mi SW 4.6 mph - N/A   Partly Cloudy
8:52 AM 33.1 °F 28.7 °F 21.0 °F 61% 30.08 in 10.0 mi SSW 4.6 mph - N/A   Partly Cloudy
9:52 AM 36.0 °F 29.6 °F 25.0 °F 64% 30.07 in 10.0 mi South 8.1 mph - N/A   Scattered Clouds
10:52 AM 37.9 °F 32.1 °F 21.9 °F 53% 30.06 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
11:52 AM 42.1 °F 37.1 °F 21.0 °F 43% 30.01 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
12:52 PM 44.1 °F 39.0 °F 21.9 °F 42% 29.98 in 10.0 mi SSW 9.2 mph - N/A   Mostly Cloudy
1:52 PM 46.9 °F - 18.0 °F 32% 29.94 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
2:52 PM 46.9 °F - 19.0 °F 33% 29.93 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
3:52 PM 46.9 °F - 19.9 °F 34% 29.93 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
4:52 PM 44.1 °F 39.5 °F 26.1 °F 49% 29.94 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
5:52 PM 42.1 °F 37.7 °F 23.0 °F 47% 29.94 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
6:52 PM 42.1 °F - 21.0 °F 43% 29.95 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:52 PM 39.9 °F - 28.9 °F 65% 29.96 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:52 PM 37.0 °F - 28.9 °F 73% 29.97 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:52 PM 37.9 °F 34.4 °F 25.0 °F 60% 29.99 in 10.0 mi SW 4.6 mph - N/A   Partly Cloudy
10:52 PM 37.0 °F - 25.0 °F 62% 30.00 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:52 PM 35.1 °F - 26.1 °F 70% 30.01 in 10.0 mi Calm Calm - N/A   Partly Cloudy