Dulles Airport, VA

7:14 PM EDT on April 25, 2018 (GMT -0400)
Washington Dulles International

Weather History for KIAD - September, 2013

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Saturday, September 7, 2013

  Actual Average Record
Temperature  
Mean Temperature 66 °F 71 °F  
Max Temperature 82 °F 83 °F 95 °F (1983)
Min Temperature 49 °F 60 °F 41 °F (1976)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 July heating degree days 0 2  
Cooling Degree Days 1 7  
Month to date cooling degree days 55 53  
Year to date cooling degree days 1146 1069  
Growing Degree Days 15 (Base 50)    
Moisture  
Dew Point 54 °F    
Average Humidity 65    
Maximum Humidity 87    
Minimum Humidity 42    
Precipitation  
Precipitation 0.00 in 0.12 in 1.11 in (2011)
Month to date precipitation 0.21 0.82  
Year to date precipitation 28.06 28.82  
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 30.06 in    
Wind  
Wind Speed 5 mph (SW)    
Max Wind Speed 13 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

Sep. 07, 2013 Rise Set
Actual Time 6:44 AM EDT 7:30 PM EDT
Civil Twilight 6:17 AM EDT 7:57 PM EDT
Nautical Twilight 5:45 AM EDT 8:29 PM EDT
Astronomical Twilight 5:12 AM EDT 9:02 PM EDT
Moon 8:54 AM EDT (9/7) 8:29 PM EDT (9/7)
Length of Visible Light 13h 40m
Length of Day
12h 46m
Waxing Crescent, 5% of the Moon is Illuminated
Sep 7
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
12:52 AM 57.0 °F - 50.0 °F 77% 30.15 in 10.0 mi NW 4.6 mph - N/A   Partly Cloudy
1:52 AM 55.0 °F - 48.9 °F 80% 30.15 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:52 AM 53.1 °F - 48.0 °F 83% 30.14 in 10.0 mi WNW 4.6 mph - N/A   Clear
3:52 AM 53.1 °F - 48.0 °F 83% 30.13 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:52 AM 50.0 °F - 46.9 °F 89% 30.13 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:52 AM 50.0 °F - 46.0 °F 86% 30.12 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:52 AM 51.1 °F - 46.9 °F 86% 30.12 in 10.0 mi WNW 3.5 mph - N/A   Scattered Clouds
7:52 AM 55.0 °F - 50.0 °F 83% 30.13 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:52 AM 61.0 °F - 51.1 °F 70% 30.12 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:52 AM 66.0 °F - 52.0 °F 60% 30.12 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:52 AM 72.0 °F - 54.0 °F 53% 30.11 in 10.0 mi SW 3.5 mph - N/A   Partly Cloudy
11:52 AM 75.0 °F - 54.0 °F 48% 30.09 in 10.0 mi Variable 5.8 mph - N/A   Scattered Clouds
12:52 PM 77.0 °F - 54.0 °F 45% 30.06 in 10.0 mi WSW 8.1 mph - N/A   Scattered Clouds
1:52 PM 80.1 °F 80.2 °F 55.9 °F 43% 30.04 in 10.0 mi Variable 6.9 mph - N/A   Mostly Cloudy
2:52 PM 81.0 °F 80.8 °F 55.9 °F 42% 30.01 in 10.0 mi South 11.5 mph - N/A   Mostly Cloudy
3:52 PM 81.0 °F 80.8 °F 55.9 °F 42% 29.99 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
4:52 PM 81.0 °F 81.0 °F 57.0 °F 44% 29.97 in 10.0 mi SSW 10.4 mph - N/A   Mostly Cloudy
5:52 PM 80.1 °F 80.2 °F 55.9 °F 43% 29.97 in 10.0 mi West 9.2 mph - N/A   Scattered Clouds
6:52 PM 77.0 °F - 57.9 °F 52% 29.96 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
7:52 PM 73.0 °F - 61.0 °F 66% 29.96 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
8:52 PM 71.1 °F - 62.1 °F 73% 29.96 in 10.0 mi South 5.8 mph - N/A   Scattered Clouds
9:52 PM 70.0 °F - 62.1 °F 76% 29.96 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
10:52 PM 66.9 °F - 62.1 °F 84% 29.96 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
11:52 PM 66.0 °F - 62.1 °F 87% 29.95 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy