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Saturday, September 21, 2013

  Actual Average (KIAD) Record (KIAD)
Temperature  
Mean Temperature 66 °F 66 °F  
Max Temperature 71 °F 77 °F 92 °F (1965)
Min Temperature 62 °F 54 °F 42 °F (1991)
Degree Days  
Heating Degree Days 0 3  
Month to date heating degree days 21  
Since 1 July heating degree days 23  
Cooling Degree Days 2 3  
Month to date cooling degree days 120  
Year to date cooling degree days 1136  
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 63 °F    
Average Humidity 91    
Maximum Humidity 100    
Minimum Humidity 73    
Precipitation  
Precipitation 0.60 in 0.13 in 2.59 in (1979)
Month to date precipitation 2.74  
Year to date precipitation 30.74  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 29.84 in    
Wind  
Wind Speed 7 mph (SSW)    
Max Wind Speed 18 mph    
Max Gust Speed 25 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Sep. 21, 2013 Rise Set
Actual Time 6:57 AM EDT 7:08 PM EDT
Civil Twilight 6:30 AM EDT 7:35 PM EDT
Nautical Twilight 5:59 AM EDT 8:06 PM EDT
Astronomical Twilight 5:27 AM EDT 8:38 PM EDT
Moon 8:19 PM EDT (9/21) 9:12 AM EDT (9/21)
Length of Visible Light 13h 04m
Length of Day
12h 11m
Waning Gibbous, 94% of the Moon is Illuminated
Sep 21
Waning Gibbous
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 66.2 °F 62.6 °F 88% 29.98 in 10.0 mi South 5.8 mph - N/A   Clear
12:35 AM 66.2 °F 62.6 °F 88% 29.98 in 10.0 mi SSE 5.8 mph - N/A   Mostly Cloudy
12:55 AM 66.2 °F 62.6 °F 88% 29.97 in 10.0 mi South 5.8 mph - N/A   Overcast
1:15 AM 66.2 °F 62.6 °F 88% 29.97 in 10.0 mi South 5.8 mph - N/A   Overcast
1:35 AM 64.4 °F 62.6 °F 94% 29.97 in 10.0 mi South 4.6 mph - N/A   Overcast
1:55 AM 64.4 °F 62.6 °F 94% 29.97 in 10.0 mi South 4.6 mph - N/A   Overcast
2:15 AM 64.4 °F 62.6 °F 94% 29.96 in 10.0 mi South 5.8 mph - N/A   Overcast
2:35 AM 62.6 °F 62.6 °F 100% 29.96 in 10.0 mi South 6.9 mph - N/A   Overcast
2:55 AM 64.4 °F 62.6 °F 94% 29.96 in 10.0 mi South 3.5 mph - N/A   Overcast
3:15 AM 62.6 °F 60.8 °F 94% 29.95 in 10.0 mi Calm Calm - N/A   Overcast
3:35 AM 62.6 °F 60.8 °F 94% 29.95 in 10.0 mi Calm Calm - N/A   Overcast
3:55 AM 62.6 °F 60.8 °F 94% 29.94 in 10.0 mi South 4.6 mph - N/A   Overcast
4:15 AM 62.6 °F 60.8 °F 94% 29.94 in 10.0 mi SSW 3.5 mph - N/A   Overcast
4:35 AM 62.6 °F 60.8 °F 94% 29.94 in 10.0 mi Calm Calm - N/A   Overcast
4:55 AM 62.6 °F 60.8 °F 94% 29.94 in 10.0 mi South 3.5 mph - N/A   Overcast
5:15 AM 64.4 °F 60.8 °F 88% 29.93 in 10.0 mi South 6.9 mph - N/A   Overcast
5:35 AM 64.4 °F 60.8 °F 88% 29.93 in 10.0 mi South 5.8 mph - N/A   Overcast
5:55 AM 64.4 °F 60.8 °F 88% 29.92 in 10.0 mi South 8.1 mph - N/A   Overcast
6:15 AM 64.4 °F 60.8 °F 88% 29.92 in 10.0 mi South 6.9 mph - N/A   Overcast
6:35 AM 64.4 °F 60.8 °F 88% 29.91 in 10.0 mi SSE 4.6 mph - N/A   Overcast
6:55 AM 64.4 °F 60.8 °F 88% 29.91 in 10.0 mi SSE 5.8 mph - N/A   Overcast
7:15 AM 62.6 °F 60.8 °F 94% 29.91 in 10.0 mi South 6.9 mph - N/A   Overcast
7:35 AM 62.6 °F 60.8 °F 94% 29.90 in 10.0 mi South 6.9 mph - N/A   Overcast
7:55 AM 64.4 °F 60.8 °F 88% 29.90 in 10.0 mi South 8.1 mph - N/A   Overcast
8:15 AM 64.4 °F 62.6 °F 94% 29.90 in 10.0 mi South 8.1 mph - N/A   Overcast
8:35 AM 64.4 °F 62.6 °F 94% 29.89 in 10.0 mi South 8.1 mph - N/A   Overcast
8:55 AM 66.2 °F 62.6 °F 88% 29.89 in 10.0 mi South 11.5 mph 17.3 mph N/A   Overcast
9:15 AM 68.0 °F 62.6 °F 83% 29.89 in 10.0 mi SSW 9.2 mph - N/A   Overcast
9:35 AM 68.0 °F 62.6 °F 83% 29.88 in 10.0 mi South 8.1 mph - N/A   Overcast
9:55 AM 68.0 °F 64.4 °F 88% 29.88 in 10.0 mi South 10.4 mph - N/A   Overcast
10:15 AM 68.0 °F 64.4 °F 88% 29.88 in 10.0 mi South 8.1 mph - N/A   Overcast
10:35 AM 68.0 °F 64.4 °F 88% 29.88 in 10.0 mi South 9.2 mph - N/A   Overcast
10:55 AM 68.0 °F 64.4 °F 88% 29.87 in 7.0 mi South 9.2 mph - N/A   Overcast
11:15 AM 69.8 °F 64.4 °F 83% 29.86 in 10.0 mi SSW 11.5 mph - N/A   Overcast
11:35 AM 69.8 °F 64.4 °F 83% 29.85 in 10.0 mi South 10.4 mph - N/A   Overcast
11:55 AM 71.6 °F 64.4 °F 78% 29.84 in 10.0 mi South 16.1 mph 19.6 mph N/A   Overcast
12:15 PM 71.6 °F 64.4 °F 78% 29.83 in 10.0 mi SSW 13.8 mph 20.7 mph N/A   Overcast
12:35 PM 71.6 °F 62.6 °F 73% 29.83 in 10.0 mi SSW 17.3 mph 23.0 mph N/A   Overcast
12:55 PM 71.6 °F 62.6 °F 73% 29.82 in 10.0 mi South 10.4 mph 19.6 mph N/A   Overcast
1:15 PM 71.6 °F 62.6 °F 73% 29.81 in 10.0 mi South 18.4 mph 25.3 mph N/A   Overcast
1:35 PM 71.6 °F 62.6 °F 73% 29.80 in 10.0 mi South 15.0 mph - N/A   Overcast
1:55 PM 71.6 °F 62.6 °F 73% 29.79 in 10.0 mi South 15.0 mph 19.6 mph N/A   Overcast
2:15 PM 71.6 °F 64.4 °F 78% 29.78 in 10.0 mi SSW 12.7 mph 18.4 mph N/A   Overcast
2:35 PM 71.6 °F 64.4 °F 78% 29.78 in 10.0 mi South 10.4 mph 16.1 mph N/A   Overcast
2:55 PM 71.6 °F 64.4 °F 78% 29.77 in 10.0 mi SSW 11.5 mph 18.4 mph N/A   Overcast
3:15 PM 69.8 °F 64.4 °F 83% 29.76 in 10.0 mi SSW 12.7 mph - N/A Rain Light Rain
3:35 PM 69.8 °F 64.4 °F 83% 29.75 in 10.0 mi South 8.1 mph - N/A Rain Light Rain
3:55 PM 69.8 °F 68.0 °F 94% 29.75 in 7.0 mi SSW 8.1 mph - 0.01 in Rain Light Rain
4:15 PM 68.0 °F 68.0 °F 100% 29.75 in 7.0 mi South 6.9 mph - 0.01 in Rain Light Rain
4:35 PM 68.0 °F 68.0 °F 100% 29.74 in 7.0 mi South 6.9 mph - 0.02 in Rain Rain
4:55 PM 68.0 °F 68.0 °F 100% 29.73 in 7.0 mi South 9.2 mph - 0.03 in Rain Light Rain
5:15 PM 68.0 °F 68.0 °F 100% 29.73 in 7.0 mi South 9.2 mph - 0.01 in Rain Light Rain
5:35 PM 68.0 °F 68.0 °F 100% 29.72 in 7.0 mi South 6.9 mph - 0.02 in Rain Light Rain
5:55 PM 68.0 °F 68.0 °F 100% 29.72 in 5.0 mi SSW 4.6 mph - 0.04 in Rain Light Rain
6:15 PM 68.0 °F 68.0 °F 100% 29.72 in 5.0 mi South 9.2 mph - 0.01 in Rain Light Rain
6:35 PM 68.0 °F 68.0 °F 100% 29.72 in 5.0 mi South 11.5 mph - 0.02 in Rain Light Rain
6:55 PM 68.0 °F 68.0 °F 100% 29.71 in 4.0 mi SSW 8.1 mph - 0.04 in Rain Light Rain
7:15 PM 64.4 °F 64.4 °F 100% 29.73 in 5.0 mi West 8.1 mph - 0.09 in Rain Heavy Rain
7:35 PM 64.4 °F 64.4 °F 100% 29.73 in 7.0 mi WSW 4.6 mph - 0.15 in Rain Rain
7:55 PM 62.6 °F 62.6 °F 100% 29.74 in 10.0 mi West 4.6 mph - 0.20 in Rain Rain
8:15 PM 62.6 °F 62.6 °F 100% 29.74 in 7.0 mi NW 3.5 mph - 0.04 in Rain Rain
8:35 PM 62.6 °F 62.6 °F 100% 29.73 in 3.0 mi Calm Calm - 0.13 in Rain Heavy Rain
8:55 PM 62.6 °F 62.6 °F 100% 29.74 in 7.0 mi Calm Calm - 0.23 in Rain Rain
9:15 PM 62.6 °F 62.6 °F 100% 29.75 in 10.0 mi NW 5.8 mph - 0.02 in Rain Rain
9:35 PM 62.6 °F 62.6 °F 100% 29.75 in 10.0 mi NNW 6.9 mph - 0.03 in Rain Light Rain
9:55 PM 62.6 °F 62.6 °F 100% 29.76 in 10.0 mi NW 5.8 mph - 0.04 in Rain Light Rain
10:15 PM 62.6 °F 62.6 °F 100% 29.76 in 10.0 mi NW 4.6 mph - 0.01 in Rain Light Rain
10:35 PM 62.6 °F 62.6 °F 100% 29.77 in 10.0 mi NW 5.8 mph - 0.01 in   Overcast
10:55 PM 62.6 °F 62.6 °F 100% 29.77 in 10.0 mi NW 5.8 mph - 0.01 in   Overcast
11:15 PM 62.6 °F 62.6 °F 100% 29.77 in 10.0 mi NNW 3.5 mph - N/A   Overcast
11:35 PM 62.6 °F 62.6 °F 100% 29.77 in 10.0 mi NW 5.8 mph - N/A   Overcast
11:55 PM 62.6 °F 62.6 °F 100% 29.76 in 10.0 mi NW 3.5 mph - N/A   Overcast