Weather History for Washington, DC

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Sunday, October 21, 2012

  Actual Average Record
Temperature  
Mean Temperature 58 °F 58 °F  
Max Temperature 67 °F 67 °F 85 °F (1947)
Min Temperature 49 °F 49 °F 30 °F (1952)
Degree Days  
Heating Degree Days 7 8  
Month to date heating degree days 101 112  
Since 1 July heating degree days 106 136  
Cooling Degree Days 0 1  
Month to date cooling degree days 35 33  
Year to date cooling degree days 1965 1546  
Growing Degree Days 7 (Base 50)    
Moisture  
Dew Point 39 °F    
Average Humidity 53    
Maximum Humidity 71    
Minimum Humidity 34    
Precipitation  
Precipitation 0.00 in 0.11 in 2.02 in (1904)
Month to date precipitation 0.98 2.30  
Year to date precipitation 23.98 32.42  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.07 in    
Wind  
Wind Speed 7 mph (NNW)    
Max Wind Speed 18 mph    
Max Gust Speed 23 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Oct. 21, 2012 Rise Set
Actual Time 7:24 AM EDT 6:20 PM EDT
Civil Twilight 6:56 AM EDT 6:47 PM EDT
Nautical Twilight 6:25 AM EDT 7:18 PM EDT
Astronomical Twilight 5:55 AM EDT 7:49 PM EDT
Moon 1:42 PM EDT (10/21) No Moon Set
Length of Visible Light 11h 50m
Length of Day
10h 56m
Waxing Crescent, 45% of the Moon is Illuminated
Oct 21
Waxing Crescent
Oct 21
First Quarter
Oct 29
Full
Nov 6
Last Quarter
Nov 13
New

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 55.0 °F 39.0 °F 55% 29.96 in 10.0 mi NW 6.9 mph - N/A   Mostly Cloudy
1:52 AM 54.0 °F 39.0 °F 57% 29.97 in 10.0 mi NNW 9.2 mph - N/A   Partly Cloudy
2:52 AM 51.8 °F 39.2 °F 62% 29.98 in 10.0 mi NNW 6.9 mph - N/A   Clear
3:52 AM 50.0 °F 39.2 °F 66% 29.98 in 10.0 mi North 3.5 mph - N/A   Clear
4:52 AM 48.9 °F 39.0 °F 69% 30.00 in 10.0 mi North 6.9 mph - N/A   Clear
5:52 AM 50.0 °F 39.2 °F 66% 30.03 in 10.0 mi North 3.5 mph - N/A   Partly Cloudy
6:52 AM 51.1 °F 39.0 °F 63% 30.06 in 10.0 mi Calm Calm - N/A   Clear
7:52 AM 52.0 °F 39.0 °F 61% 30.08 in 10.0 mi Calm Calm - N/A   Clear
8:52 AM 53.6 °F 42.8 °F 67% 30.11 in 10.0 mi Calm Calm - N/A   Clear
9:52 AM 57.0 °F 41.0 °F 55% 30.11 in 10.0 mi NW 6.9 mph - N/A   Clear
10:52 AM 60.8 °F 41.0 °F 48% 30.12 in 10.0 mi NW 12.7 mph - N/A   Clear
11:52 AM 62.1 °F 39.9 °F 44% 30.12 in 10.0 mi NW 13.8 mph - N/A   Clear
12:52 PM 64.4 °F 39.2 °F 40% 30.10 in 10.0 mi NNW 13.8 mph 18.4 mph N/A   Partly Cloudy
1:52 PM 66.0 °F 39.0 °F 37% 30.08 in 10.0 mi NW 10.4 mph - N/A   Partly Cloudy
2:52 PM 66.9 °F 37.9 °F 34% 30.06 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
3:52 PM 66.0 °F 37.0 °F 34% 30.07 in 10.0 mi NW 13.8 mph - N/A   Scattered Clouds
4:52 PM 64.9 °F 37.0 °F 36% 30.07 in 10.0 mi NNW 9.2 mph - N/A   Partly Cloudy
5:52 PM 62.6 °F 37.4 °F 39% 30.08 in 10.0 mi NNW 10.4 mph - N/A   Partly Cloudy
6:52 PM 62.1 °F 37.0 °F 39% 30.10 in 10.0 mi NNW 8.1 mph - N/A   Partly Cloudy
7:52 PM 60.1 °F 37.9 °F 44% 30.11 in 10.0 mi North 6.9 mph - N/A   Partly Cloudy
8:52 PM 59.0 °F 37.0 °F 44% 30.12 in 10.0 mi NNW 8.1 mph - N/A   Clear
9:52 PM 54.0 °F 37.9 °F 55% 30.14 in 10.0 mi North 6.9 mph - N/A   Clear
10:52 PM 54.0 °F 37.9 °F 55% 30.14 in 10.0 mi Calm Calm - N/A   Clear
11:52 PM 55.0 °F 39.9 °F 57% 30.16 in 10.0 mi Calm Calm - N/A   Clear