Dulles, VA

1:51 PM EDT on August 24, 2016 (GMT -0400)
Washington Dulles International

Weather History for KIAD - May, 2013

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Friday, May 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 71 °F 63 °F  
Max Temperature 83 °F 75 °F 89 °F (1986)
Min Temperature 58 °F 51 °F 30 °F (1984)
Degree Days  
Heating Degree Days 0 4  
Month to date heating degree days 111 92  
Since 1 July heating degree days 4525 4664  
Cooling Degree Days 6 2  
Month to date cooling degree days 26 25  
Year to date cooling degree days 56 45  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 55    
Maximum Humidity 78    
Minimum Humidity 31    
Precipitation  
Precipitation 0.00 in 0.16 in 1.22 in (1970)
Month to date precipitation 2.21 2.42  
Year to date precipitation 13.00 14.69  
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 30.05 in    
Wind  
Wind Speed 5 mph (ENE)    
Max Wind Speed 13 mph    
Max Gust Speed 18 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. 17, 2013 Rise Set
Actual Time 5:55 AM EDT 8:17 PM EDT
Civil Twilight 5:25 AM EDT 8:47 PM EDT
Nautical Twilight 4:47 AM EDT 9:25 PM EDT
Astronomical Twilight 4:06 AM EDT 10:06 PM EDT
Moon 12:24 PM EDT (5/17) 1:10 AM EDT (5/17)
Length of Visible Light 15h 22m
Length of Day
14h 22m
Waxing Crescent, 45% of the Moon is Illuminated
May 17
Waxing Crescent
May 18
First Quarter
May 25
Full
May 31
Last Quarter
Jun 8
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 68.0 °F - 54.0 °F 61% 29.94 in 10.0 mi NNW 8.1 mph - N/A   Scattered Clouds
1:52 AM 64.0 °F - 55.0 °F 73% 29.94 in 10.0 mi East 3.5 mph - N/A   Clear
2:52 AM 66.0 °F - 54.0 °F 65% 29.94 in 10.0 mi North 8.1 mph - N/A   Clear
3:52 AM 60.1 °F - 53.1 °F 78% 29.96 in 10.0 mi Calm Calm - N/A   Clear
4:52 AM 62.1 °F - 54.0 °F 75% 29.99 in 10.0 mi NW 5.8 mph - N/A   Clear
5:52 AM 62.1 °F - 54.0 °F 75% 30.03 in 10.0 mi North 5.8 mph - N/A   Partly Cloudy
6:52 AM 63.0 °F - 55.9 °F 78% 30.06 in 10.0 mi SSE 3.5 mph - N/A   Scattered Clouds
7:52 AM 68.0 °F - 55.9 °F 65% 30.08 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
8:52 AM 71.1 °F - 57.0 °F 61% 30.09 in 10.0 mi NNW 6.9 mph - N/A   Partly Cloudy
9:52 AM 73.9 °F - 53.1 °F 48% 30.10 in 10.0 mi NNE 6.9 mph - N/A   Partly Cloudy
10:52 AM 75.0 °F - 48.0 °F 38% 30.11 in 10.0 mi NNE 4.6 mph - N/A   Partly Cloudy
11:52 AM 78.1 °F - 46.0 °F 32% 30.10 in 10.0 mi NW 4.6 mph - N/A   Scattered Clouds
12:52 PM 79.0 °F - 46.0 °F 31% 30.09 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:52 PM 81.0 °F - 48.9 °F 33% 30.08 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
2:52 PM 82.0 °F - 48.9 °F 31% 30.07 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
3:52 PM 82.0 °F 81.2 °F 53.1 °F 37% 30.05 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
4:52 PM 82.0 °F - 51.1 °F 34% 30.04 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
5:52 PM 81.0 °F - 52.0 °F 36% 30.04 in 10.0 mi SW 8.1 mph - N/A   Mostly Cloudy
6:52 PM 79.0 °F - 53.1 °F 40% 30.05 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
7:52 PM 77.0 °F - 52.0 °F 42% 30.06 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
8:52 PM 73.0 °F - 52.0 °F 48% 30.08 in 10.0 mi SE 8.1 mph - N/A   Mostly Cloudy
9:52 PM 70.0 °F - 52.0 °F 53% 30.11 in 10.0 mi East 5.8 mph - N/A   Mostly Cloudy
10:52 PM 69.1 °F - 48.9 °F 49% 30.12 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
11:52 PM 66.9 °F - 48.9 °F 52% 30.13 in 10.0 mi SE 3.5 mph - N/A   Overcast