Weather History for KIAD - September, 2013

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Tuesday, September 10, 2013

  Actual Average Record
Temperature  
Mean Temperature 82 °F 70 °F  
Max Temperature 93 °F 82 °F 99 °F (1983)
Min Temperature 70 °F 59 °F 43 °F (1981)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 0 3  
Since 1 July heating degree days 0 5  
Cooling Degree Days 17 6  
Month to date cooling degree days 91 71  
Year to date cooling degree days 1182 1087  
Growing Degree Days 32 (Base 50)    
Moisture  
Dew Point 69 °F    
Average Humidity 72    
Maximum Humidity 97    
Minimum Humidity 47    
Precipitation  
Precipitation 0.00 in 0.12 in 1.50 in (1968)
Month to date precipitation 0.21 1.19  
Year to date precipitation 28.06 29.19  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 7 mph (South)    
Max Wind Speed 14 mph    
Max Gust Speed 17 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Sep. 10, 2013 Rise Set
Actual Time 6:46 AM EDT 7:25 PM EDT
Civil Twilight 6:20 AM EDT 7:52 PM EDT
Nautical Twilight 5:48 AM EDT 8:24 PM EDT
Astronomical Twilight 5:15 AM EDT 8:56 PM EDT
Moon 12:07 PM EDT (9/10) 10:30 PM EDT (9/10)
Length of Visible Light 13h 32m
Length of Day
12h 38m
Waxing Crescent, 28% of the Moon is Illuminated
Sep 10
Waxing Crescent
Sep 12
First Quarter
Sep 19
Full
Sep 26
Last Quarter
Oct 4
New

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:44 AM 71.6 °F - 66.2 °F 83% 30.15 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
12:52 AM 72.0 °F - 66.9 °F 84% 30.14 in 10.0 mi South 9.2 mph - N/A   Overcast
1:52 AM 71.1 °F - 66.9 °F 87% 30.14 in 10.0 mi South 5.8 mph - N/A   Overcast
2:20 AM 71.6 °F - 66.2 °F 83% 30.15 in 10.0 mi Calm Calm - N/A   Overcast
2:52 AM 71.1 °F - 66.9 °F 87% 30.14 in 10.0 mi South 6.9 mph - N/A   Overcast
3:01 AM 71.6 °F - 68.0 °F 88% 30.15 in 10.0 mi South 5.8 mph - N/A   Overcast
3:28 AM 71.6 °F - 68.0 °F 88% 30.15 in 10.0 mi South 6.9 mph - N/A   Overcast
3:52 AM 71.1 °F - 68.0 °F 90% 30.14 in 10.0 mi SSW 6.9 mph - N/A   Overcast
4:52 AM 70.0 °F - 68.0 °F 93% 30.13 in 9.0 mi South 9.2 mph - N/A   Mostly Cloudy
5:09 AM 69.8 °F - 68.0 °F 94% 30.14 in 9.0 mi South 8.1 mph - N/A   Mostly Cloudy
5:52 AM 70.0 °F - 68.0 °F 93% 30.14 in 8.0 mi South 6.9 mph - N/A   Mostly Cloudy
5:59 AM 69.8 °F - 68.0 °F 94% 30.15 in 8.0 mi South 8.1 mph - N/A   Mostly Cloudy
6:47 AM 71.6 °F - 68.0 °F 88% 30.17 in 3.0 mi SSW 8.1 mph - N/A   Overcast
6:52 AM 71.1 °F - 68.0 °F 90% 30.16 in 3.0 mi SSW 8.1 mph - N/A   Overcast
7:52 AM 71.1 °F - 68.0 °F 90% 30.17 in 4.0 mi SSW 5.8 mph - N/A   Overcast
8:52 AM 73.9 °F - 69.1 °F 85% 30.17 in 5.0 mi South 6.9 mph - N/A   Haze
9:11 AM 73.4 °F - 69.8 °F 88% 30.18 in 7.0 mi South 8.1 mph - N/A   Scattered Clouds
9:52 AM 77.0 °F - 69.1 °F 76% 30.18 in 7.0 mi South 5.8 mph - N/A   Partly Cloudy
10:52 AM 80.1 °F 82.7 °F 68.0 °F 67% 30.18 in 10.0 mi South 5.8 mph - N/A   Partly Cloudy
11:52 AM 84.9 °F 88.2 °F 68.0 °F 57% 30.16 in 10.0 mi South 3.5 mph - N/A   Partly Cloudy
12:52 PM 88.0 °F 92.1 °F 69.1 °F 53% 30.14 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:52 PM 91.0 °F 95.6 °F 69.1 °F 48% 30.13 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
2:52 PM 91.9 °F 95.9 °F 68.0 °F 45% 30.11 in 10.0 mi SW 11.5 mph 16.1 mph N/A   Mostly Cloudy
3:52 PM 90.0 °F 95.4 °F 70.0 °F 52% 30.10 in 10.0 mi SSE 10.4 mph - N/A   Mostly Cloudy
4:52 PM 91.0 °F 97.6 °F 71.1 °F 52% 30.09 in 10.0 mi South 11.5 mph 17.3 mph N/A   Overcast
5:52 PM 89.1 °F 94.1 °F 70.0 °F 53% 30.09 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
6:52 PM 87.1 °F 92.0 °F 70.0 °F 57% 30.09 in 10.0 mi SSW 9.2 mph - N/A   Clear
7:52 PM 84.0 °F 89.0 °F 71.1 °F 65% 30.11 in 10.0 mi South 8.1 mph - N/A   Scattered Clouds
8:52 PM 82.0 °F 86.3 °F 71.1 °F 69% 30.12 in 10.0 mi South 5.8 mph - N/A   Partly Cloudy
9:52 PM 81.0 °F 85.2 °F 72.0 °F 74% 30.14 in 10.0 mi South 6.9 mph - N/A   Partly Cloudy
10:52 PM 80.1 °F 83.8 °F 72.0 °F 76% 30.14 in 10.0 mi South 8.1 mph - N/A   Clear
11:52 PM 79.0 °F - 72.0 °F 79% 30.14 in 10.0 mi South 5.8 mph - N/A   Clear