Weather History for KIAD - May, 2013

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Wednesday, May 22, 2013

  Actual Average Record
Temperature  
Mean Temperature 77 °F 65 °F  
Max Temperature 87 °F 77 °F 88 °F (1964)
Min Temperature 66 °F 53 °F 31 °F (2002)
Degree Days  
Heating Degree Days 0 3  
Month to date heating degree days 112 109  
Since 1 July heating degree days 4526 4681  
Cooling Degree Days 12 3  
Month to date cooling degree days 60 39  
Year to date cooling degree days 90 59  
Growing Degree Days 28 (Base 50)    
Moisture  
Dew Point 67 °F    
Average Humidity 74    
Maximum Humidity 97    
Minimum Humidity 50    
Precipitation  
Precipitation T in 0.15 in 2.07 in (2001)
Month to date precipitation 2.34 3.18  
Year to date precipitation 13.13 15.45  
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 29.89 in    
Wind  
Wind Speed 8 mph (SSW)    
Max Wind Speed 18 mph    
Max Gust Speed 24 mph    
Visibility 8 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 22, 2013 Rise Set
Actual Time 5:51 AM EDT 8:21 PM EDT
Civil Twilight 5:20 AM EDT 8:52 PM EDT
Nautical Twilight 4:42 AM EDT 9:30 PM EDT
Astronomical Twilight 4:00 AM EDT 10:13 PM EDT
Moon 5:43 PM EDT (5/22) 3:52 AM EDT (5/22)
Length of Visible Light 15h 31m
Length of Day
14h 30m
Waxing Gibbous, 91% of the Moon is Illuminated
May 22
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 72.0 °F - 68.0 °F 87% 29.89 in 10.0 mi South 5.8 mph - N/A   Partly Cloudy
1:52 AM 71.1 °F - 68.0 °F 90% 29.86 in 8.0 mi South 5.8 mph - N/A   Scattered Clouds
2:52 AM 71.1 °F - 68.0 °F 90% 29.87 in 7.0 mi South 6.9 mph - N/A   Partly Cloudy
3:52 AM 70.0 °F - 68.0 °F 93% 29.86 in 6.0 mi South 5.8 mph - N/A   Partly Cloudy
4:52 AM 69.1 °F - 68.0 °F 96% 29.86 in 5.0 mi South 4.6 mph - N/A   Mostly Cloudy
5:52 AM 69.1 °F - 68.0 °F 96% 29.87 in 4.0 mi South 8.1 mph - N/A   Scattered Clouds
6:33 AM 69.8 °F - 68.0 °F 94% 29.90 in 2.0 mi SW 9.2 mph - N/A   Mostly Cloudy
6:52 AM 70.0 °F - 68.0 °F 93% 29.90 in 2.0 mi SSW 11.5 mph - N/A   Overcast
7:52 AM 71.1 °F - 68.0 °F 90% 29.92 in 3.0 mi SSW 10.4 mph - N/A   Overcast
8:52 AM 73.0 °F - 69.1 °F 87% 29.94 in 4.0 mi SSW 8.1 mph - N/A   Overcast
9:10 AM 73.4 °F - 68.0 °F 83% 29.94 in 7.0 mi South 10.4 mph 18.4 mph N/A   Mostly Cloudy
9:27 AM 75.2 °F - 69.8 °F 83% 29.94 in 7.0 mi SSW 11.5 mph - N/A   Mostly Cloudy
9:52 AM 75.9 °F - 69.1 °F 79% 29.94 in 7.0 mi SSW 10.4 mph - N/A   Mostly Cloudy
10:52 AM 78.1 °F - 69.1 °F 74% 29.93 in 8.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
11:52 AM 80.1 °F 82.9 °F 69.1 °F 69% 29.93 in 10.0 mi SSW 9.2 mph - N/A   Mostly Cloudy
12:52 PM 82.9 °F 87.0 °F 70.0 °F 65% 29.91 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
1:52 PM 84.9 °F 88.2 °F 68.0 °F 57% 29.88 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
2:52 PM 87.1 °F 90.6 °F 68.0 °F 53% 29.86 in 10.0 mi SSW 10.4 mph - N/A   Mostly Cloudy
3:52 PM 84.9 °F 89.4 °F 70.0 °F 61% 29.85 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
4:52 PM 87.1 °F 89.9 °F 66.9 °F 51% 29.83 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
5:52 PM 86.0 °F 89.4 °F 68.0 °F 55% 29.83 in 10.0 mi South 10.4 mph - N/A   Mostly Cloudy
6:52 PM 84.0 °F 87.0 °F 68.0 °F 58% 29.84 in 10.0 mi South 10.4 mph - N/A   Mostly Cloudy
7:52 PM 82.0 °F 85.5 °F 69.1 °F 65% 29.86 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
8:27 PM 75.2 °F - 60.8 °F 61% 29.88 in 10.0 mi NNW 10.4 mph - N/A   Overcast
8:52 PM 75.9 °F - 60.1 °F 58% 29.88 in 10.0 mi North 6.9 mph - N/A   Overcast
8:56 PM 75.2 °F - 60.8 °F 61% 29.89 in 10.0 mi North 9.2 mph - N/A Thunderstorm Thunderstorm
9:19 PM 75.2 °F - 60.8 °F 61% 29.90 in 10.0 mi NNE 5.8 mph - N/A   Overcast
9:39 PM 73.4 °F - 62.6 °F 69% 29.92 in 10.0 mi NW 15.0 mph 24.2 mph N/A Thunderstorm Thunderstorm
9:52 PM 73.0 °F - 62.1 °F 68% 29.93 in 10.0 mi NW 9.2 mph 23.0 mph 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
10:38 PM 69.8 °F - 64.4 °F 83% 29.93 in 10.0 mi Calm Calm - 0.00 in   Mostly Cloudy
10:52 PM 69.1 °F - 64.0 °F 84% 29.91 in 10.0 mi Calm Calm - 0.00 in   Scattered Clouds
11:52 PM 66.9 °F - 64.0 °F 90% 29.91 in 10.0 mi Calm Calm - N/A   Mostly Cloudy