Dulles, VA

5:21 PM EDT on August 27, 2016 (GMT -0400)
Washington Dulles International

Weather History for KIAD - July, 2013

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Monday, July 22, 2013

  Actual Average Record
Temperature  
Mean Temperature 80 °F 77 °F  
Max Temperature 89 °F 88 °F 105 °F (2011)
Min Temperature 71 °F 66 °F 50 °F (1974)
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 15 12  
Month to date cooling degree days 342 259  
Year to date cooling degree days 737 588  
Since 1 June cooling degree days 598 496  
Growing Degree Days 30 (Base 50)    
Moisture  
Dew Point 71 °F    
Average Humidity 74    
Maximum Humidity 93    
Minimum Humidity 55    
Precipitation  
Precipitation 0.22 in 0.12 in 2.25 in (1969)
Month to date precipitation 6.12 2.58  
Year to date precipitation 24.75 23.38  
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 29.86 in    
Wind  
Wind Speed 5 mph (SSW)    
Max Wind Speed 22 mph    
Max Gust Speed 30 mph    
Visibility 9 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Date:

Astronomy

Jul. 22, 2013 Rise Set
Actual Time 6:02 AM EDT 8:29 PM EDT
Civil Twilight 5:31 AM EDT 9:00 PM EDT
Nautical Twilight 4:53 AM EDT 9:37 PM EDT
Astronomical Twilight 4:11 AM EDT 10:19 PM EDT
Moon 8:15 PM EDT (7/22) 5:55 AM EDT (7/22)
Length of Visible Light 15h 28m
Length of Day
14h 27m
Full, 100% of the Moon is Illuminated
Jul 22
Full
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 73.0 °F - 71.1 °F 93% 29.93 in 8.0 mi Calm Calm - N/A   Scattered Clouds
1:52 AM 73.0 °F - 71.1 °F 93% 29.92 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
2:52 AM 72.0 °F - 70.0 °F 93% 29.92 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:52 AM 72.0 °F - 70.0 °F 93% 29.91 in 8.0 mi SSW 3.5 mph - N/A   Mostly Cloudy
4:52 AM 72.0 °F - 70.0 °F 93% 29.90 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
5:52 AM 73.0 °F - 71.1 °F 93% 29.91 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
6:52 AM 73.0 °F - 71.1 °F 93% 29.91 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
7:02 AM 73.4 °F - 71.6 °F 94% 29.92 in 5.0 mi Calm Calm - N/A   Mostly Cloudy
7:52 AM 73.9 °F - 72.0 °F 93% 29.93 in 5.0 mi West 3.5 mph - N/A   Overcast
8:52 AM 75.0 °F - 72.0 °F 90% 29.93 in 10.0 mi SSW 4.6 mph - N/A   Overcast
9:06 AM 75.2 °F - 71.6 °F 89% 29.94 in 10.0 mi South 3.5 mph - N/A   Mostly Cloudy
9:52 AM 77.0 °F - 72.0 °F 84% 29.93 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
10:36 AM 78.8 °F - 71.6 °F 78% 29.93 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:52 AM 80.1 °F 83.6 °F 71.1 °F 74% 29.93 in 10.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
11:52 AM 82.0 °F 86.3 °F 71.1 °F 69% 29.91 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
12:52 PM 84.9 °F 90.7 °F 72.0 °F 65% 29.89 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:52 PM 84.9 °F 90.1 °F 71.1 °F 63% 29.87 in 10.0 mi SSE 5.8 mph - N/A   Mostly Cloudy
2:52 PM 86.0 °F 91.5 °F 71.1 °F 61% 29.84 in 10.0 mi South 4.6 mph - N/A   Partly Cloudy
3:52 PM 84.9 °F 89.4 °F 70.0 °F 61% 29.82 in 10.0 mi South 8.1 mph - N/A   Scattered Clouds
4:52 PM 88.0 °F 92.9 °F 70.0 °F 55% 29.79 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
5:52 PM 87.1 °F 94.5 °F 73.0 °F 63% 29.78 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
6:26 PM 86.0 °F 91.8 °F 71.6 °F 62% 29.78 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
6:52 PM 84.9 °F 90.1 °F 71.1 °F 63% 29.76 in 10.0 mi SSW 12.7 mph 18.4 mph N/A   Mostly Cloudy
7:52 PM 82.9 °F 87.5 °F 71.1 °F 67% 29.77 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
8:52 PM 82.0 °F 86.7 °F 72.0 °F 71% 29.77 in 10.0 mi South 5.8 mph - N/A   Overcast
9:17 PM 82.4 °F 87.2 °F 71.6 °F 70% 29.78 in 10.0 mi South 8.1 mph - N/A Thunderstorm Thunderstorm
9:52 PM 80.1 °F 82.7 °F 68.0 °F 67% 29.78 in 10.0 mi WNW 17.3 mph 20.7 mph N/A Thunderstorm Thunderstorm
10:06 PM 78.8 °F - 66.2 °F 65% 29.80 in 10.0 mi WNW 15.0 mph 23.0 mph N/A Thunderstorm Thunderstorm
10:43 PM 71.6 °F - 69.8 °F 94% 29.80 in 2.5 mi NW 12.7 mph - 0.08 in Rain Heavy Rain
10:52 PM 72.0 °F - 69.1 °F 91% 29.79 in 3.0 mi NNW 6.9 mph - 0.15 in Rain Heavy Rain
11:52 PM 72.0 °F - 70.0 °F 93% 29.78 in 10.0 mi SSE 3.5 mph - 0.07 in   Overcast