Weather History for KIAD - August, 2013

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Thursday, August 22, 2013

  Actual Average Record
Temperature  
Mean Temperature 78 °F -  
Max Temperature 88 °F - 101 °F (1983)
Min Temperature 68 °F - 51 °F (1969)
Degree Days  
Heating Degree Days 0    
Month to date heating degree days 0  
Since 1 June heating degree days 0  
Since 1 July heating degree days 0  
Cooling Degree Days 13    
Month to date cooling degree days 186  
Year to date cooling degree days 1000 155  
Since 1 June cooling degree days 861  
Growing Degree Days 28 (Base 50)    
Moisture  
Dew Point 66 °F    
Average Humidity 73    
Maximum Humidity 97    
Minimum Humidity 48    
Precipitation  
Precipitation 0.00 in - 0.94 in (2009)
Month to date precipitation 1.31  
Year to date precipitation 27.21  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.03 in    
Wind  
Wind Speed 6 mph (West)    
Max Wind Speed 18 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Aug. 22, 2013 Rise Set
Actual Time 6:29 AM EDT 7:54 PM EDT
Civil Twilight 6:01 AM EDT 8:22 PM EDT
Nautical Twilight 5:28 AM EDT 8:55 PM EDT
Astronomical Twilight 4:52 AM EDT 9:31 PM EDT
Moon 8:39 PM EDT (8/22) 8:14 AM EDT (8/22)
Length of Visible Light 14h 20m
Length of Day
13h 24m
Waning Gibbous, 97% of the Moon is Illuminated
Aug 22
Waning Gibbous
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter
Sep 19
Full

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 71.1 °F - 68.0 °F 90% 30.09 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
1:52 AM 70.0 °F - 68.0 °F 93% 30.09 in 10.0 mi South 3.5 mph - N/A   Overcast
2:52 AM 70.0 °F - 68.0 °F 93% 30.09 in 10.0 mi WNW 6.9 mph - N/A   Overcast
3:52 AM 70.0 °F - 68.0 °F 93% 30.07 in 10.0 mi SW 3.5 mph - N/A   Mostly Cloudy
4:52 AM 69.1 °F - 66.9 °F 93% 30.04 in 10.0 mi Calm Calm - N/A   Overcast
5:52 AM 69.1 °F - 66.9 °F 93% 30.05 in 10.0 mi Calm Calm - N/A   Overcast
6:52 AM 69.1 °F - 66.9 °F 93% 30.06 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:52 AM 71.1 °F - 68.0 °F 90% 30.08 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:52 AM 75.0 °F - 68.0 °F 79% 30.07 in 10.0 mi Calm Calm - N/A   Clear
9:52 AM 80.1 °F 82.1 °F 66.0 °F 62% 30.07 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
10:52 AM 82.0 °F 83.4 °F 64.0 °F 54% 30.07 in 10.0 mi WNW 11.5 mph - N/A   Clear
11:52 AM 84.9 °F 85.4 °F 62.1 °F 46% 30.06 in 10.0 mi NW 10.4 mph - N/A   Scattered Clouds
12:52 PM 84.9 °F 87.1 °F 66.0 °F 53% 30.05 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
1:52 PM 86.0 °F 87.3 °F 64.0 °F 48% 30.01 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
2:52 PM 84.9 °F 86.6 °F 64.9 °F 51% 30.01 in 10.0 mi West 11.5 mph - N/A   Mostly Cloudy
3:52 PM 84.0 °F 85.4 °F 64.0 °F 51% 29.99 in 10.0 mi West 10.4 mph - N/A   Mostly Cloudy
4:52 PM 86.0 °F 87.3 °F 64.0 °F 48% 29.97 in 10.0 mi WNW 11.5 mph 24.2 mph N/A   Mostly Cloudy
5:52 PM 86.0 °F 87.3 °F 64.0 °F 48% 29.96 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
6:52 PM 84.9 °F 86.6 °F 64.9 °F 51% 29.95 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
7:52 PM 79.0 °F - 66.9 °F 66% 29.95 in 10.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
8:52 PM 79.0 °F - 66.9 °F 66% 29.96 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy
9:52 PM 77.0 °F - 66.9 °F 71% 29.98 in 10.0 mi WSW 3.5 mph - N/A   Mostly Cloudy
10:52 PM 77.0 °F - 66.0 °F 69% 29.98 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
11:52 PM 73.0 °F - 66.0 °F 79% 29.98 in 10.0 mi Calm Calm - N/A   Mostly Cloudy