Weather History for Dulles Airport, VA

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Thursday, July 18, 2013

  Actual Average Record
Temperature  
Mean Temperature 85 °F 77 °F  
Max Temperature 96 °F 88 °F 101 °F (2012)
Min Temperature 73 °F 66 °F 51 °F (1985)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 June heating degree days 0 15  
Since 1 July heating degree days 0 0  
Cooling Degree Days 20 12  
Month to date cooling degree days 271 211  
Year to date cooling degree days 666 540  
Since 1 June cooling degree days 527 448  
Growing Degree Days 34 (Base 50)    
Moisture  
Dew Point 73 °F    
Average Humidity 71    
Maximum Humidity 93    
Minimum Humidity 49    
Precipitation  
Precipitation 0.00 in 0.12 in 0.92 in (1965)
Month to date precipitation 5.77 2.13  
Year to date precipitation 24.40 22.93  
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 30.08 in    
Wind  
Wind Speed 4 mph (West)    
Max Wind Speed 9 mph    
Max Gust Speed 13 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jul. 18, 2013 Rise Set
Actual Time 5:59 AM EDT 8:32 PM EDT
Civil Twilight 5:28 AM EDT 9:03 PM EDT
Nautical Twilight 4:49 AM EDT 9:41 PM EDT
Astronomical Twilight 4:06 AM EDT 10:24 PM EDT
Moon 4:27 PM EDT (7/18) 1:47 AM EDT (7/18)
Length of Visible Light 15h 35m
Length of Day
14h 33m
Waxing Gibbous, 77% of the Moon is Illuminated
Jul 18
Waxing Gibbous
Jul 22
Full
Jul 29
Last Quarter
Aug 6
New
Aug 14
First Quarter

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 79.0 °F - 72.0 °F 79% 30.12 in 10.0 mi South 3.5 mph - N/A   Clear
1:52 AM 77.0 °F - 72.0 °F 84% 30.12 in 10.0 mi NW 4.6 mph - N/A   Clear
2:52 AM 73.9 °F - 71.1 °F 91% 30.10 in 9.0 mi Calm Calm - N/A   Clear
3:52 AM 75.9 °F - 72.0 °F 87% 30.10 in 9.0 mi Calm Calm - N/A   Clear
4:52 AM 75.0 °F - 72.0 °F 90% 30.10 in 8.0 mi Calm Calm - N/A   Clear
5:52 AM 73.9 °F - 71.1 °F 91% 30.10 in 7.0 mi Calm Calm - N/A   Scattered Clouds
6:52 AM 78.1 °F - 72.0 °F 81% 30.10 in 8.0 mi NW 4.6 mph - N/A   Scattered Clouds
7:52 AM 81.0 °F 85.8 °F 73.0 °F 77% 30.11 in 8.0 mi NW 5.8 mph - N/A   Partly Cloudy
8:52 AM 84.9 °F 91.4 °F 73.0 °F 67% 30.12 in 10.0 mi NW 5.8 mph - N/A   Partly Cloudy
9:52 AM 88.0 °F 96.5 °F 73.9 °F 63% 30.12 in 10.0 mi NNW 6.9 mph - N/A   Partly Cloudy
10:52 AM 90.0 °F 99.0 °F 73.9 °F 59% 30.12 in 10.0 mi NNE 5.8 mph - N/A   Partly Cloudy
11:52 AM 91.0 °F 100.4 °F 73.9 °F 57% 30.11 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:52 PM 91.9 °F 100.7 °F 73.0 °F 54% 30.10 in 10.0 mi Variable 6.9 mph - N/A   Scattered Clouds
1:52 PM 93.9 °F 104.0 °F 73.9 °F 52% 30.08 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
2:52 PM 93.9 °F 103.4 °F 73.0 °F 51% 30.06 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
3:52 PM 95.0 °F 104.5 °F 73.0 °F 49% 30.04 in 10.0 mi NNW 3.5 mph - N/A   Mostly Cloudy
4:52 PM 93.9 °F 102.1 °F 72.0 °F 49% 30.02 in 10.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
5:52 PM 93.9 °F 103.4 °F 73.0 °F 51% 30.01 in 10.0 mi West 6.9 mph - N/A   Mostly Cloudy
6:52 PM 93.0 °F 100.7 °F 72.0 °F 50% 30.02 in 10.0 mi WSW 5.8 mph - N/A   Mostly Cloudy
7:52 PM 89.1 °F 97.0 °F 73.0 °F 59% 30.03 in 10.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
8:52 PM 84.9 °F 94.1 °F 75.9 °F 74% 30.03 in 10.0 mi SSW 3.5 mph - N/A   Scattered Clouds
9:52 PM 84.0 °F 92.6 °F 75.9 °F 76% 30.03 in 9.0 mi SSW 4.6 mph - N/A   Partly Cloudy
10:52 PM 82.0 °F 88.6 °F 75.0 °F 79% 30.02 in 8.0 mi SSW 4.6 mph - N/A   Partly Cloudy
11:52 PM 82.0 °F 89.4 °F 75.9 °F 82% 30.03 in 8.0 mi SSW 6.9 mph - N/A   Partly Cloudy