Weather History for Dulles Airport, VA

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Monday, July 15, 2013

  Actual Average Record
Temperature  
Mean Temperature 82 °F 77 °F  
Max Temperature 93 °F 88 °F 98 °F (1995)
Min Temperature 70 °F 66 °F 53 °F (1981)
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 17 12  
Month to date cooling degree days 213 175  
Year to date cooling degree days 608 504  
Since 1 June cooling degree days 469 412  
Growing Degree Days 32 (Base 50)    
Moisture  
Dew Point 71 °F    
Average Humidity 69    
Maximum Humidity 93    
Minimum Humidity 44    
Precipitation  
Precipitation 0.00 in 0.12 in 1.01 in (2005)
Month to date precipitation 5.77 1.78  
Year to date precipitation 24.40 22.58  
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 30.27 in    
Wind  
Wind Speed 3 mph (West)    
Max Wind Speed 10 mph    
Max Gust Speed 18 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jul. 15, 2013 Rise Set
Actual Time 5:56 AM EDT 8:34 PM EDT
Civil Twilight 5:25 AM EDT 9:05 PM EDT
Nautical Twilight 4:46 AM EDT 9:44 PM EDT
Astronomical Twilight 4:03 AM EDT 10:27 PM EDT
Moon 1:09 PM EDT (7/15) No Moon Set
Length of Visible Light 15h 39m
Length of Day
14h 37m
Waxing Crescent, 45% of the Moon is Illuminated
Jul 15
Waxing Crescent
Jul 15
First Quarter
Jul 22
Full
Jul 29
Last Quarter
Aug 6
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 75.0 °F - 71.1 °F 87% 30.30 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:52 AM 73.9 °F - 71.1 °F 91% 30.30 in 10.0 mi SSW 4.6 mph - N/A   Clear
2:52 AM 73.9 °F - 71.1 °F 91% 30.29 in 10.0 mi SSW 5.8 mph - N/A   Clear
3:52 AM 73.0 °F - 71.1 °F 93% 30.29 in 10.0 mi SSW 4.6 mph - N/A   Clear
4:52 AM 72.0 °F - 70.0 °F 93% 30.29 in 10.0 mi Calm Calm - N/A   Clear
5:52 AM 72.0 °F - 70.0 °F 93% 30.30 in 8.0 mi Calm Calm - N/A   Clear
6:52 AM 73.0 °F - 71.1 °F 93% 30.31 in 6.0 mi Calm Calm - N/A   Partly Cloudy
7:52 AM 77.0 °F - 72.0 °F 84% 30.31 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:52 AM 82.0 °F 86.7 °F 72.0 °F 71% 30.32 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:52 AM 84.9 °F 90.1 °F 71.1 °F 63% 30.31 in 10.0 mi WNW 6.9 mph - N/A   Clear
10:52 AM 86.0 °F 90.7 °F 70.0 °F 59% 30.30 in 10.0 mi Calm Calm - N/A   Clear
11:52 AM 88.0 °F 92.9 °F 70.0 °F 55% 30.30 in 10.0 mi NNW 5.8 mph - N/A   Partly Cloudy
12:52 PM 90.0 °F 94.5 °F 69.1 °F 50% 30.29 in 10.0 mi Variable 6.9 mph - N/A   Partly Cloudy
1:52 PM 91.0 °F 95.6 °F 69.1 °F 48% 30.27 in 10.0 mi NNW 5.8 mph - N/A   Scattered Clouds
2:52 PM 91.0 °F 96.6 °F 70.0 °F 50% 30.25 in 10.0 mi NW 8.1 mph - N/A   Scattered Clouds
3:52 PM 91.0 °F 95.6 °F 69.1 °F 48% 30.25 in 10.0 mi West 3.5 mph - N/A   Partly Cloudy
4:52 PM 93.0 °F 97.4 °F 68.0 °F 44% 30.23 in 10.0 mi NNW 9.2 mph - N/A   Scattered Clouds
5:52 PM 91.9 °F 96.9 °F 69.1 °F 47% 30.22 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
6:52 PM 91.0 °F 95.6 °F 69.1 °F 48% 30.21 in 10.0 mi WNW 5.8 mph - N/A   Scattered Clouds
7:52 PM 89.1 °F 94.1 °F 70.0 °F 53% 30.20 in 10.0 mi West 4.6 mph - N/A   Scattered Clouds
8:52 PM 84.9 °F 90.1 °F 71.1 °F 63% 30.20 in 10.0 mi WSW 4.6 mph - N/A   Scattered Clouds
9:52 PM 82.0 °F 86.7 °F 72.0 °F 71% 30.22 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:52 PM 80.1 °F 83.8 °F 72.0 °F 76% 30.22 in 10.0 mi Calm Calm - N/A   Clear
11:52 PM 78.1 °F - 72.0 °F 81% 30.23 in 10.0 mi Calm Calm - N/A   Clear