Weather History for KIAD - May, 2013

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Wednesday, May 15, 2013

  Actual Average Record
Temperature  
Mean Temperature 69 °F 63 °F  
Max Temperature 85 °F 75 °F 88 °F (1991)
Min Temperature 52 °F 51 °F 37 °F (1984)
Degree Days  
Heating Degree Days 0 4  
Month to date heating degree days 111 84  
Since 1 July heating degree days 4525 4656  
Cooling Degree Days 4 2  
Month to date cooling degree days 12 21  
Year to date cooling degree days 42 41  
Growing Degree Days 18 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 60    
Maximum Humidity 77    
Minimum Humidity 42    
Precipitation  
Precipitation T in 0.16 in 2.40 in (2003)
Month to date precipitation 2.21 2.11  
Year to date precipitation 13.00 14.38  
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 29.86 in    
Wind  
Wind Speed 8 mph (South)    
Max Wind Speed 21 mph    
Max Gust Speed 26 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 15, 2013 Rise Set
Actual Time 5:56 AM EDT 8:15 PM EDT
Civil Twilight 5:26 AM EDT 8:45 PM EDT
Nautical Twilight 4:49 AM EDT 9:23 PM EDT
Astronomical Twilight 4:09 AM EDT 10:03 PM EDT
Moon 10:30 AM EDT (5/15) 12:01 AM EDT (5/15)
Length of Visible Light 15h 19m
Length of Day
14h 18m
Waxing Crescent, 26% of the Moon is Illuminated
May 15
Waxing Crescent
May 18
First Quarter
May 25
Full
May 31
Last Quarter
Jun 8
New

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 57.9 °F - 39.0 °F 49% 30.02 in 10.0 mi SSE 8.1 mph - N/A   Mostly Cloudy
1:52 AM 57.9 °F - 41.0 °F 53% 29.99 in 10.0 mi SSE 6.9 mph - N/A   Overcast
2:52 AM 57.9 °F - 41.0 °F 53% 29.99 in 10.0 mi SE 5.8 mph - N/A   Mostly Cloudy
3:52 AM 55.9 °F - 42.1 °F 60% 29.97 in 10.0 mi SE 4.6 mph - N/A   Scattered Clouds
4:52 AM 54.0 °F - 43.0 °F 66% 29.96 in 10.0 mi ESE 5.8 mph - N/A   Mostly Cloudy
5:52 AM 52.0 °F - 44.1 °F 74% 29.95 in 10.0 mi SSE 4.6 mph - N/A   Scattered Clouds
6:52 AM 53.1 °F - 46.0 °F 77% 29.95 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:52 AM 57.0 °F - 43.0 °F 59% 29.94 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
8:52 AM 57.0 °F - 46.0 °F 67% 29.94 in 10.0 mi SSW 3.5 mph - 0.00 in Rain Light Rain
9:52 AM 57.9 °F - 46.0 °F 65% 29.93 in 10.0 mi South 5.8 mph - 0.00 in   Overcast
10:52 AM 60.1 °F - 46.9 °F 62% 29.91 in 10.0 mi South 9.2 mph - N/A   Overcast
11:52 AM 62.1 °F - 48.9 °F 62% 29.90 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
12:52 PM 71.1 °F - 54.0 °F 55% 29.84 in 10.0 mi SSW 9.2 mph - N/A   Mostly Cloudy
1:52 PM 75.9 °F - 57.9 °F 54% 29.83 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
2:52 PM 82.0 °F 82.7 °F 61.0 °F 49% 29.81 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
3:52 PM 82.9 °F 83.2 °F 60.1 °F 46% 29.76 in 10.0 mi South 12.7 mph 17.3 mph N/A   Scattered Clouds
4:52 PM 84.9 °F 85.0 °F 61.0 °F 44% 29.72 in 10.0 mi South 18.4 mph - N/A   Scattered Clouds
5:52 PM 84.9 °F 84.8 °F 60.1 °F 43% 29.69 in 10.0 mi SSW 18.4 mph 21.9 mph N/A   Mostly Cloudy
6:52 PM 84.0 °F 84.4 °F 61.0 °F 46% 29.69 in 10.0 mi SSW 12.7 mph 20.7 mph N/A   Mostly Cloudy
7:52 PM 82.9 °F 83.3 °F 61.0 °F 47% 29.70 in 10.0 mi SSW 15.0 mph - N/A   Mostly Cloudy
8:52 PM 79.0 °F - 62.1 °F 56% 29.72 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy
9:52 PM 75.0 °F - 62.1 °F 64% 29.75 in 10.0 mi SSW 6.9 mph - N/A   Scattered Clouds
10:52 PM 77.0 °F - 59.0 °F 54% 29.77 in 10.0 mi WSW 3.5 mph - N/A   Mostly Cloudy
11:52 PM 78.1 °F - 54.0 °F 43% 29.77 in 10.0 mi WSW 5.8 mph - N/A   Mostly Cloudy