Dulles Airport, VA

2:59 AM EDT on August 21, 2017 (GMT -0400)
Washington Dulles International

Weather History for KIAD - May, 2013

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Sunday, May 26, 2013

  Actual Average Record
Temperature  
Mean Temperature 60 °F 66 °F  
Max Temperature 73 °F 78 °F 92 °F (2007)
Min Temperature 46 °F 54 °F 38 °F (1967)
Degree Days  
Heating Degree Days 5 3  
Month to date heating degree days 137 121  
Since 1 July heating degree days 4551 4693  
Cooling Degree Days 0 4  
Month to date cooling degree days 67 52  
Year to date cooling degree days 97 72  
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 35 °F    
Average Humidity 44    
Maximum Humidity 65    
Minimum Humidity 22    
Precipitation  
Precipitation 0.00 in 0.14 in 3.59 in (2009)
Month to date precipitation 2.83 3.79  
Year to date precipitation 13.62 16.06  
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 30.19 in    
Wind  
Wind Speed 9 mph (WNW)    
Max Wind Speed 21 mph    
Max Gust Speed 29 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

May. 26, 2013 Rise Set
Actual Time 5:49 AM EDT 8:25 PM EDT
Civil Twilight 5:18 AM EDT 8:56 PM EDT
Nautical Twilight 4:39 AM EDT 9:34 PM EDT
Astronomical Twilight 3:56 AM EDT 10:18 PM EDT
Moon 10:11 PM EDT (5/26) 7:15 AM EDT (5/26)
Length of Visible Light 15h 38m
Length of Day
14h 36m
Waning Gibbous, 97% of the Moon is Illuminated
May 26
Waning Gibbous
May 31
Last Quarter
Jun 8
New
Jun 16
First Quarter
Jun 23
Full

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 52.0 °F 34.0 °F 50% 30.18 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
1:52 AM 52.0 °F 33.1 °F 49% 30.17 in 10.0 mi NW 9.2 mph - N/A   Clear
2:52 AM 46.9 °F 35.1 °F 63% 30.18 in 10.0 mi WNW 8.1 mph - N/A   Partly Cloudy
3:52 AM 48.0 °F 35.1 °F 61% 30.18 in 10.0 mi West 6.9 mph - N/A   Clear
4:52 AM 46.9 °F 35.1 °F 63% 30.18 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
5:52 AM 48.9 °F 34.0 °F 56% 30.19 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
6:52 AM 51.1 °F 34.0 °F 52% 30.21 in 10.0 mi NW 10.4 mph - N/A   Mostly Cloudy
7:52 AM 54.0 °F 34.0 °F 47% 30.22 in 10.0 mi NW 12.7 mph - N/A   Scattered Clouds
8:52 AM 55.9 °F 34.0 °F 44% 30.23 in 10.0 mi NNW 9.2 mph - N/A   Partly Cloudy
9:52 AM 60.1 °F 35.1 °F 39% 30.23 in 10.0 mi NW 10.4 mph - N/A   Partly Cloudy
10:52 AM 62.1 °F 35.1 °F 37% 30.22 in 10.0 mi NW 12.7 mph 19.6 mph N/A   Scattered Clouds
11:52 AM 64.0 °F 36.0 °F 35% 30.22 in 10.0 mi WNW 11.5 mph 19.6 mph N/A   Partly Cloudy
12:52 PM 64.9 °F 35.1 °F 33% 30.20 in 10.0 mi WNW 11.5 mph 20.7 mph N/A   Partly Cloudy
1:52 PM 66.9 °F 34.0 °F 30% 30.17 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
2:52 PM 69.1 °F 33.1 °F 26% 30.16 in 10.0 mi WNW 12.7 mph 21.9 mph N/A   Partly Cloudy
3:52 PM 72.0 °F 32.0 °F 23% 30.15 in 10.0 mi WNW 19.6 mph 24.2 mph N/A   Partly Cloudy
4:52 PM 72.0 °F 32.0 °F 23% 30.14 in 10.0 mi WNW 16.1 mph 24.2 mph N/A   Partly Cloudy
5:52 PM 72.0 °F 30.9 °F 22% 30.13 in 10.0 mi WNW 13.8 mph 19.6 mph N/A   Partly Cloudy
6:52 PM 71.1 °F 30.9 °F 23% 30.14 in 10.0 mi NNW 10.4 mph - N/A   Partly Cloudy
7:52 PM 68.0 °F 35.1 °F 30% 30.15 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
8:52 PM 64.9 °F 35.1 °F 33% 30.18 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
9:52 PM 55.9 °F 39.9 °F 55% 30.21 in 10.0 mi Calm Calm - N/A   Partly Cloudy
10:52 PM 55.9 °F 39.0 °F 53% 30.22 in 10.0 mi Calm Calm - N/A   Clear
11:52 PM 51.1 °F 39.9 °F 66% 30.23 in 10.0 mi Calm Calm - N/A   Clear