Dulles Airport, VA

10:47 AM EDT on August 20, 2017 (GMT -0400)
Washington Dulles International

Weather History for KIAD - May, 2013

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Tuesday, May 14, 2013

  Actual Average Record
Temperature  
Mean Temperature 49 °F 62 °F  
Max Temperature 65 °F 75 °F 89 °F (2010)
Min Temperature 32 °F 51 °F 32 °F (1996)
Degree Days  
Heating Degree Days 16 4  
Month to date heating degree days 111 80  
Since 1 July heating degree days 4525 4652  
Cooling Degree Days 0 2  
Month to date cooling degree days 8 19  
Year to date cooling degree days 38 39  
Moisture  
Dew Point 32 °F    
Average Humidity 63    
Maximum Humidity 96    
Minimum Humidity 30    
Precipitation  
Precipitation 0.00 in 0.16 in 1.31 in (2005)
Month to date precipitation 2.21 1.95  
Year to date precipitation 13.00 14.22  
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 30.15 in    
Wind  
Wind Speed 4 mph (South)    
Max Wind Speed 15 mph    
Max Gust Speed 22 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 14, 2013 Rise Set
Actual Time 5:57 AM EDT 8:14 PM EDT
Civil Twilight 5:27 AM EDT 8:45 PM EDT
Nautical Twilight 4:51 AM EDT 9:22 PM EDT
Astronomical Twilight 4:10 AM EDT 10:02 PM EDT
Moon 9:35 AM EDT (5/14) No Moon Set
Length of Visible Light 15h 17m
Length of Day
14h 17m
Waxing Crescent, 19% of the Moon is Illuminated
May 14
Waxing Crescent
May 18
First Quarter
May 25
Full
May 31
Last Quarter
Jun 8
New

Hourly Weather History & Observations

Time (EDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 41.0 °F 37.1 °F 30.9 °F 67% 30.19 in 10.0 mi WSW 5.8 mph - N/A   Clear
1:52 AM 39.0 °F - 30.9 °F 73% 30.19 in 10.0 mi Calm Calm - N/A   Clear
2:52 AM 37.0 °F - 32.0 °F 82% 30.19 in 10.0 mi Calm Calm - N/A   Clear
3:52 AM 34.0 °F - 32.0 °F 92% 30.19 in 10.0 mi Calm Calm - N/A   Clear
4:52 AM 35.1 °F 32.2 °F 30.9 °F 85% 30.20 in 10.0 mi Variable 3.5 mph - N/A   Clear
5:52 AM 32.0 °F - 30.0 °F 92% 30.21 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:52 AM 34.0 °F - 32.0 °F 92% 30.22 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:52 AM 42.1 °F - 33.1 °F 70% 30.22 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:52 AM 46.9 °F - 33.1 °F 59% 30.23 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
9:52 AM 51.1 °F - 28.9 °F 43% 30.22 in 10.0 mi NNE 3.5 mph - N/A   Mostly Cloudy
10:52 AM 54.0 °F - 30.0 °F 40% 30.21 in 10.0 mi WNW 8.1 mph - N/A   Mostly Cloudy
11:52 AM 57.0 °F - 30.9 °F 37% 30.19 in 10.0 mi Variable 5.8 mph - N/A   Mostly Cloudy
12:52 PM 59.0 °F - 30.9 °F 35% 30.16 in 10.0 mi West 8.1 mph 16.1 mph N/A   Scattered Clouds
1:52 PM 62.1 °F - 32.0 °F 32% 30.14 in 10.0 mi NW 9.2 mph - N/A   Scattered Clouds
2:52 PM 64.0 °F - 32.0 °F 30% 30.12 in 10.0 mi Variable 5.8 mph - N/A   Mostly Cloudy
3:52 PM 63.0 °F - 32.0 °F 31% 30.10 in 10.0 mi NNW 4.6 mph - N/A   Overcast
4:52 PM 63.0 °F - 30.9 °F 30% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:52 PM 63.0 °F - 32.0 °F 31% 30.08 in 10.0 mi Calm Calm - N/A   Overcast
6:52 PM 61.0 °F - 35.1 °F 38% 30.07 in 10.0 mi SSE 3.5 mph - N/A   Overcast
7:52 PM 60.1 °F - 35.1 °F 39% 30.05 in 10.0 mi ESE 4.6 mph - N/A   Overcast
8:52 PM 59.0 °F - 36.0 °F 42% 30.05 in 10.0 mi SE 5.8 mph - N/A   Overcast
9:52 PM 57.9 °F - 36.0 °F 44% 30.07 in 10.0 mi ESE 4.6 mph - N/A   Overcast
10:52 PM 57.9 °F - 35.1 °F 42% 30.06 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
11:52 PM 57.9 °F - 36.0 °F 44% 30.04 in 10.0 mi SSE 5.8 mph - N/A   Overcast