Dulles Airport, VA

3:37 AM EDT on May 23, 2018 (GMT -0400)
Washington Dulles International

Weather History for KIAD - April, 2013

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Wednesday, April 17, 2013

  Actual Average Record
Temperature  
Mean Temperature 66 °F 55 °F  
Max Temperature 77 °F 67 °F 93 °F (2002)
Min Temperature 55 °F 43 °F 27 °F (1983)
Degree Days  
Heating Degree Days 0 11  
Month to date heating degree days 163 223  
Since 1 July heating degree days 4289 4460  
Cooling Degree Days 1 1  
Month to date cooling degree days 26 5  
Year to date cooling degree days 26 8  
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 57 °F    
Average Humidity 79    
Maximum Humidity 100    
Minimum Humidity 57    
Precipitation  
Precipitation 0.06 in 0.11 in 1.44 in (2000)
Month to date precipitation 0.88 1.99  
Year to date precipitation 9.37 10.79  
Snow  
Snow 0.00 in 0.00 in T in (1983)
Month to date snowfall 0.0 0.3  
Since 1 July snowfall 12.7 22.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.18 in    
Wind  
Wind Speed 5 mph (ENE)    
Max Wind Speed 16 mph    
Max Gust Speed 20 mph    
Visibility 9 miles    
Events Fog , Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

Apr. 17, 2013 Rise Set
Actual Time 6:30 AM EDT 7:49 PM EDT
Civil Twilight 6:02 AM EDT 8:16 PM EDT
Nautical Twilight 5:29 AM EDT 8:50 PM EDT
Astronomical Twilight 4:54 AM EDT 9:25 PM EDT
Moon 11:43 AM EDT (4/17) 1:24 AM EDT (4/17)
Length of Visible Light 14h 14m
Length of Day
13h 19m
Waxing Crescent, 42% of the Moon is Illuminated
Apr 17
Waxing Crescent
Apr 18
First Quarter
Apr 25
Full
May 2
Last Quarter
May 9
New

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 66.0 °F 55.9 °F 70% 30.21 in 10.0 mi WNW 13.8 mph - N/A   Mostly Cloudy
12:57 AM 66.2 °F 55.4 °F 68% 30.21 in 10.0 mi West 10.4 mph - N/A   Mostly Cloudy
1:52 AM 62.1 °F 60.1 °F 93% 30.19 in 10.0 mi South 4.6 mph - 0.06 in Rain Light Rain
2:52 AM 62.1 °F 60.1 °F 93% 30.14 in 10.0 mi South 4.6 mph - 0.00 in   Overcast
3:52 AM 61.0 °F 59.0 °F 93% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:52 AM 59.0 °F 57.9 °F 96% 30.14 in 5.0 mi Calm Calm - N/A   Partly Cloudy
5:52 AM 57.0 °F 55.9 °F 96% 30.15 in 5.0 mi Calm Calm - N/A Fog Patches of Fog
5:59 AM 57.2 °F 55.4 °F 94% 30.15 in 1.0 mi Calm Calm - N/A Fog Patches of Fog
6:15 AM 57.2 °F 55.4 °F 94% 30.16 in 1.0 mi North 3.5 mph - N/A Fog Patches of Fog
6:33 AM 57.2 °F 55.4 °F 94% 30.17 in 7.0 mi Calm Calm - N/A Fog Patches of Fog
6:52 AM 55.9 °F 55.0 °F 97% 30.17 in 7.0 mi Calm Calm - N/A Fog Patches of Fog
7:52 AM 61.0 °F 60.1 °F 97% 30.19 in 5.0 mi Calm Calm - N/A   Mostly Cloudy
8:52 AM 66.0 °F 61.0 °F 84% 30.18 in 10.0 mi NNE 3.5 mph - N/A   Overcast
9:52 AM 68.0 °F 61.0 °F 78% 30.19 in 10.0 mi Calm Calm - N/A   Overcast
10:52 AM 71.1 °F 60.1 °F 68% 30.20 in 10.0 mi NNW 3.5 mph - N/A   Mostly Cloudy
11:52 AM 73.9 °F 57.9 °F 57% 30.19 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
12:52 PM 75.0 °F 59.0 °F 57% 30.18 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
1:52 PM 73.9 °F 59.0 °F 59% 30.17 in 10.0 mi North 13.8 mph 17.3 mph N/A   Mostly Cloudy
2:52 PM 73.0 °F 59.0 °F 61% 30.17 in 10.0 mi NNW 12.7 mph - N/A   Mostly Cloudy
3:52 PM 71.1 °F 57.9 °F 63% 30.17 in 10.0 mi NE 11.5 mph - N/A   Mostly Cloudy
4:52 PM 71.6 °F 57.2 °F 60% 30.16 in 10.0 mi NE 9.2 mph - N/A   Mostly Cloudy
5:52 PM 70.0 °F 57.0 °F 63% 30.17 in 10.0 mi ENE 6.9 mph - N/A   Mostly Cloudy
6:52 PM 69.1 °F 55.9 °F 63% 30.17 in 10.0 mi East 8.1 mph - N/A   Overcast
7:52 PM 68.0 °F 55.0 °F 63% 30.19 in 10.0 mi East 5.8 mph - N/A   Overcast
8:52 PM 66.9 °F 55.0 °F 66% 30.20 in 10.0 mi ESE 5.8 mph - N/A   Overcast
9:52 PM 64.9 °F 53.1 °F 65% 30.21 in 10.0 mi ESE 8.1 mph - N/A   Mostly Cloudy
10:52 PM 64.0 °F 54.0 °F 70% 30.23 in 10.0 mi SE 6.9 mph - N/A   Overcast
11:25 PM 62.6 °F 55.4 °F 77% 30.23 in 10.0 mi ESE 4.6 mph - N/A   Overcast
11:52 PM 63.0 °F 55.0 °F 75% 30.22 in 10.0 mi ESE 5.8 mph - N/A   Overcast