Dulles Airport, VA

8:58 PM EST on November 13, 2019 (GMT -0500)
Washington Dulles International

Weather History for KIAD - August, 2019

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Sunday, August 25, 2019

  Actual Average Record
Temperature  
Mean Temperature 70 °F 74 °F  
Max Temperature 79 °F 86 °F 97 °F (1998)
Min Temperature 61 °F 63 °F 47 °F (1971)
Degree Days  
Heating Degree Days 0 0  
Month to date heating degree days 0 0  
Since 1 June heating degree days 9 15  
Since 1 July heating degree days 0 0  
Cooling Degree Days 5 10  
Month to date cooling degree days 317 269  
Year to date cooling degree days 1196 961  
Since 1 June cooling degree days 1017 869  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 55 °F    
Average Humidity 61    
Maximum Humidity 80    
Minimum Humidity 43    
Precipitation  
Precipitation 0.00 in 0.11 in 3.03 in (1999)
Month to date precipitation 4.51 2.91  
Year to date precipitation 29.56 27.38  
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 30.19 in    
Wind  
Wind Speed 6 mph ()    
Max Wind Speed 16 mph    
Max Gust Speed 23 mph    
Visibility 10.0 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: Averaged Metar Reports

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

Aug. 25, 2019 Rise Set
Actual Time 6:32 AM EDT 7:51 PM EDT
Civil Twilight 6:04 AM EDT 8:18 PM EDT
Nautical Twilight 5:31 AM EDT 8:51 PM EDT
Astronomical Twilight 4:56 AM EDT 9:26 PM EDT
Moon 1:07 AM EDT (8/25) 4:07 PM EDT (8/25)
Length of Visible Light 14h 14m
Length of Day
13h 18m
Waning Crescent, 29% of the Moon is Illuminated
Aug 25
Waning Crescent
Aug 30
New
Sep 5
First Quarter
Sep 14
Full
Sep 21
Last Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 64.9 °F 55.9 °F 73% 30.21 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
1:52 AM 64.0 °F 55.9 °F 75% 30.20 in 10.0 mi NW 5.8 mph - N/A   Overcast
2:52 AM 64.0 °F 55.0 °F 73% 30.19 in 10.0 mi NNW 3.5 mph - N/A   Scattered Clouds
3:52 AM 62.1 °F 55.9 °F 80% 30.19 in 10.0 mi NNE 4.6 mph - N/A   Mostly Cloudy
4:52 AM 64.0 °F 55.9 °F 75% 30.19 in 10.0 mi North 3.5 mph - N/A   Overcast
5:52 AM 64.0 °F 55.9 °F 75% 30.19 in 10.0 mi North 3.5 mph - N/A   Overcast
6:52 AM 64.0 °F 55.9 °F 75% 30.21 in 10.0 mi NNE 4.6 mph - N/A   Mostly Cloudy
7:52 AM 66.0 °F 57.0 °F 73% 30.23 in 10.0 mi North 6.9 mph - N/A   Mostly Cloudy
8:52 AM 69.1 °F 57.0 °F 65% 30.23 in 10.0 mi NNE 9.2 mph - N/A   Partly Cloudy
9:52 AM 72.0 °F 55.0 °F 55% 30.23 in 10.0 mi ENE 12.7 mph - N/A   Partly Cloudy
10:52 AM 73.0 °F 53.1 °F 49% 30.22 in 10.0 mi ENE 15.0 mph 19.6 mph N/A   Scattered Clouds
11:52 AM 73.9 °F 54.0 °F 50% 30.22 in 10.0 mi East 8.1 mph 19.6 mph N/A   Mostly Cloudy
12:52 PM 75.9 °F 54.0 °F 46% 30.20 in 10.0 mi NE 13.8 mph 19.6 mph N/A   Mostly Cloudy
1:52 PM 77.0 °F 54.0 °F 45% 30.19 in 10.0 mi NNE 8.1 mph - N/A   Mostly Cloudy
2:52 PM 75.9 °F 53.1 °F 45% 30.18 in 10.0 mi Variable 4.6 mph - N/A   Mostly Cloudy
3:52 PM 77.0 °F 54.0 °F 45% 30.17 in 10.0 mi ENE 8.1 mph - N/A   Mostly Cloudy
4:52 PM 75.9 °F 53.1 °F 45% 30.17 in 10.0 mi NE 12.7 mph - N/A   Mostly Cloudy
5:52 PM 75.9 °F 53.1 °F 45% 30.17 in 10.0 mi ENE 9.2 mph - N/A   Scattered Clouds
6:52 PM 75.0 °F 52.0 °F 44% 30.16 in 10.0 mi East 10.4 mph - N/A   Scattered Clouds
7:52 PM 71.1 °F 55.0 °F 57% 30.15 in 10.0 mi East 5.8 mph - N/A   Scattered Clouds
8:52 PM 70.0 °F 55.9 °F 61% 30.17 in 10.0 mi East 5.8 mph - N/A   Partly Cloudy
9:52 PM 68.0 °F 55.9 °F 65% 30.19 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:52 PM 68.0 °F 55.9 °F 65% 30.19 in 10.0 mi ESE 4.6 mph - N/A   Mostly Cloudy
11:52 PM 64.0 °F 55.9 °F 75% 30.19 in 10.0 mi Calm Calm - N/A   Mostly Cloudy