Weather History for Washington, DC

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Wednesday, April 18, 2007

  Actual Average Record
Temperature  
Mean Temperature 48 °F 58 °F  
Max Temperature 54 °F 68 °F 95 °F (1976)
Min Temperature 42 °F 48 °F 25 °F (1875)
Degree Days  
Heating Degree Days 17 8  
Month to date heating degree days 310 191  
Since 1 July heating degree days 3871 3867  
Cooling Degree Days 0 1  
Month to date cooling degree days 2 9  
Year to date cooling degree days 7 11  
Moisture  
Dew Point 36 °F    
Average Humidity 61    
Maximum Humidity 71    
Minimum Humidity 50    
Precipitation  
Precipitation 0.00 in 0.09 in 1.40 in (1924)
Month to date precipitation 3.96 1.85  
Year to date precipitation 11.83 10.76  
Snow  
Snow 0.00 in 0.00 in T in (2001)
Month to date snowfall 0.4 0.0  
Since 1 July snowfall 9.5 15.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.81 in    
Wind  
Wind Speed 8 mph (North)    
Max Wind Speed 13 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Apr. 18, 2007 Rise Set
Actual Time 6:27 AM EDT 7:47 PM EDT
Civil Twilight 6:00 AM EDT 8:15 PM EDT
Nautical Twilight 5:27 AM EDT 8:48 PM EDT
Astronomical Twilight 4:52 AM EDT 9:23 PM EDT
Moon 6:50 AM EDT (4/18) 9:48 PM EDT (4/18)
Length of Visible Light 14h 15m
Length of Day
13h 19m
New Moon, 2% of the Moon is Illuminated
Apr 18
New Moon
Apr 24
First Quarter
May 2
Full
May 10
Last Quarter
May 16
New

Hourly Weather History & Observations

Time (EDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 46.0 °F 39.9 °F 34.0 °F 63% 29.76 in 10.0 mi NW 13.8 mph - N/A   Partly Cloudy
1:52 AM 46.0 °F 39.0 °F 34.0 °F 63% 29.74 in 10.0 mi NNW 17.3 mph 24.2 mph N/A   Partly Cloudy
2:52 AM 45.0 °F 37.4 °F 34.0 °F 65% 29.73 in 10.0 mi North 18.4 mph 23.0 mph N/A   Partly Cloudy
3:52 AM 44.1 °F 38.1 °F 34.0 °F 68% 29.73 in 10.0 mi NNW 11.5 mph - N/A   Partly Cloudy
4:52 AM 44.1 °F 39.0 °F 34.0 °F 68% 29.73 in 10.0 mi NW 9.2 mph - N/A   Scattered Clouds
5:52 AM 43.0 °F 37.2 °F 34.0 °F 71% 29.75 in 10.0 mi NNW 10.4 mph - N/A   Partly Cloudy
6:52 AM 43.0 °F 37.7 °F 34.0 °F 71% 29.77 in 10.0 mi NNW 9.2 mph - N/A   Partly Cloudy
7:52 AM 45.0 °F 38.2 °F 34.0 °F 65% 29.79 in 10.0 mi North 15.0 mph - N/A   Scattered Clouds
8:52 AM 46.9 °F - 34.0 °F 61% 29.80 in 10.0 mi North 12.7 mph - N/A   Scattered Clouds
9:52 AM 48.9 °F - 35.1 °F 59% 29.82 in 10.0 mi North 8.1 mph - N/A   Mostly Cloudy
10:55 AM 50.0 °F - 35.6 °F 58% 29.83 in 10.0 mi North 9.2 mph - N/A   Overcast
11:16 AM 51.8 °F - 37.4 °F 58% 29.82 in 10.0 mi ENE 6.9 mph - N/A   Overcast
11:52 AM 54.0 °F - 37.9 °F 55% 29.81 in 10.0 mi NE 5.8 mph - N/A   Overcast
12:52 PM 52.0 °F - 36.0 °F 54% 29.81 in 10.0 mi NE 4.6 mph - N/A   Overcast
1:52 PM 53.1 °F - 36.0 °F 52% 29.82 in 10.0 mi NE 4.6 mph - N/A   Overcast
2:52 PM 53.1 °F - 36.0 °F 52% 29.82 in 10.0 mi NE 3.5 mph - N/A   Overcast
3:52 PM 54.0 °F - 37.9 °F 55% 29.82 in 10.0 mi North 3.5 mph - N/A   Overcast
4:52 PM 53.1 °F - 37.0 °F 55% 29.82 in 10.0 mi NNW 8.1 mph - N/A   Overcast
5:52 PM 53.1 °F - 37.9 °F 57% 29.82 in 10.0 mi NNW 6.9 mph - N/A   Overcast
6:52 PM 51.1 °F - 37.9 °F 61% 29.84 in 10.0 mi East 11.5 mph - N/A   Overcast
7:52 PM 51.1 °F - 37.0 °F 59% 29.86 in 10.0 mi East 4.6 mph - N/A   Overcast
8:52 PM 52.0 °F - 37.0 °F 57% 29.88 in 10.0 mi Variable 4.6 mph - N/A   Overcast
9:52 PM 50.0 °F - 39.0 °F 66% 29.89 in 10.0 mi South 3.5 mph - N/A   Overcast
10:52 PM 48.9 °F - 39.0 °F 69% 29.90 in 10.0 mi SSE 3.5 mph - N/A   Overcast
11:52 PM 48.9 °F - 37.9 °F 66% 29.90 in 10.0 mi Calm Calm - N/A   Overcast