Weather History for KIAD - May, 2013

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Thursday, May 23, 2013

  Actual Average Record
Temperature  
Mean Temperature 72 °F 65 °F  
Max Temperature 81 °F 77 °F 92 °F (1964)
Min Temperature 63 °F 53 °F 39 °F (1971)
Degree Days  
Heating Degree Days 0 3  
Month to date heating degree days 112 112  
Since 1 July heating degree days 4526 4684  
Cooling Degree Days 7 3  
Month to date cooling degree days 67 42  
Year to date cooling degree days 97 62  
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 63 °F    
Average Humidity 76    
Maximum Humidity 93    
Minimum Humidity 58    
Precipitation  
Precipitation 0.49 in 0.16 in 2.40 in (2010)
Month to date precipitation 2.83 3.34  
Year to date precipitation 13.62 15.61  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 12.7 22.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.84 in    
Wind  
Wind Speed 8 mph (SSW)    
Max Wind Speed 28 mph    
Max Gust Speed 35 mph    
Visibility 9 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 23, 2013 Rise Set
Actual Time 5:50 AM EDT 8:22 PM EDT
Civil Twilight 5:20 AM EDT 8:53 PM EDT
Nautical Twilight 4:41 AM EDT 9:31 PM EDT
Astronomical Twilight 3:59 AM EDT 10:14 PM EDT
Moon 6:53 PM EDT (5/23) 4:33 AM EDT (5/23)
Length of Visible Light 15h 33m
Length of Day
14h 31m
Waxing Gibbous, 97% of the Moon is Illuminated
May 23
Waxing Gibbous
May 25
Full
May 31
Last Quarter
Jun 8
New
Jun 16
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 66.9 °F - 64.0 °F 90% 29.89 in 10.0 mi ESE 4.6 mph - N/A   Scattered Clouds
1:52 AM 66.0 °F - 63.0 °F 90% 29.88 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:52 AM 66.0 °F - 63.0 °F 90% 29.87 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:52 AM 68.0 °F - 64.0 °F 87% 29.87 in 10.0 mi SSW 10.4 mph - N/A   Mostly Cloudy
4:52 AM 69.1 °F - 63.0 °F 81% 29.88 in 10.0 mi SSW 10.4 mph - 0.00 in Rain Light Rain
5:52 AM 69.1 °F - 64.0 °F 84% 29.87 in 10.0 mi South 6.9 mph - 0.00 in   Mostly Cloudy
6:52 AM 70.0 °F - 64.9 °F 84% 29.87 in 10.0 mi South 10.4 mph - 0.00 in Rain Light Rain
7:52 AM 70.0 °F - 66.0 °F 87% 29.88 in 10.0 mi South 12.7 mph - 0.00 in   Mostly Cloudy
8:52 AM 70.0 °F - 64.9 °F 84% 29.89 in 10.0 mi South 9.2 mph 18.4 mph 0.00 in   Mostly Cloudy
9:52 AM 73.9 °F - 66.0 °F 76% 29.88 in 10.0 mi SSW 13.8 mph - N/A   Mostly Cloudy
10:52 AM 73.0 °F - 64.0 °F 73% 29.89 in 10.0 mi South 12.7 mph - N/A   Overcast
11:52 AM 73.0 °F - 63.0 °F 71% 29.89 in 10.0 mi South 11.5 mph - N/A   Overcast
12:52 PM 73.9 °F - 64.9 °F 73% 29.88 in 10.0 mi SSW 9.2 mph 18.4 mph N/A   Mostly Cloudy
1:52 PM 75.0 °F - 64.0 °F 69% 29.86 in 10.0 mi SW 8.1 mph - N/A   Mostly Cloudy
2:52 PM 78.1 °F - 64.9 °F 64% 29.83 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
3:52 PM 80.1 °F 81.9 °F 64.9 °F 60% 29.79 in 10.0 mi South 10.4 mph - N/A   Mostly Cloudy
4:52 PM 79.0 °F - 63.0 °F 58% 29.77 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
5:52 PM 77.0 °F - 66.0 °F 69% 29.76 in 10.0 mi SSE 10.4 mph - N/A   Overcast
6:52 PM 75.0 °F - 66.0 °F 73% 29.77 in 10.0 mi South 9.2 mph - N/A   Overcast
7:10 PM 69.8 °F - 60.8 °F 73% 29.79 in 10.0 mi NNW 11.5 mph - N/A   Overcast
7:52 PM 68.0 °F - 61.0 °F 78% 29.79 in 10.0 mi NE 3.5 mph - N/A   Overcast
8:52 PM 68.0 °F - 61.0 °F 78% 29.78 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:42 PM 68.0 °F - 62.6 °F 83% 29.80 in 10.0 mi North 5.8 mph - N/A   Overcast
9:52 PM 69.1 °F - 61.0 °F 75% 29.79 in 10.0 mi NW 5.8 mph - N/A   Overcast
10:18 PM 66.2 °F - 60.8 °F 83% 29.82 in 5.0 mi WNW 23.0 mph 34.5 mph 0.01 in Rain Light Rain
10:20 PM 64.4 °F - 60.8 °F 88% 29.82 in 2.5 mi WNW 19.6 mph 34.5 mph 0.02 in Rain Heavy Rain
10:23 PM 64.4 °F - 60.8 °F 88% 29.82 in 1.5 mi WNW 18.4 mph 34.5 mph 0.10 in Rain , Thunderstorm Heavy Thunderstorms and Rain
10:52 PM 64.0 °F - 61.0 °F 90% 29.80 in 4.0 mi West 5.8 mph - 0.34 in Rain , Thunderstorm Light Thunderstorms and Rain
11:06 PM 62.6 °F - 60.8 °F 94% 29.81 in 7.0 mi SSW 3.5 mph - 0.01 in Rain Light Rain
11:52 PM 63.0 °F - 61.0 °F 93% 29.82 in 6.0 mi South 4.6 mph - 0.06 in Rain Light Rain