Dulles Airport, VA

4:39 AM EDT on May 24, 2017 (GMT -0400)
Washington Dulles International

Weather History for KIAD - August, 2013

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Week of August 11, 2013 through August 17, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 89 °F 81 °F 75 °F
Mean Temperature 79 °F 71 °F 66 °F
Min Temperature 69 °F 60 °F 53 °F
Degree Days  
Heating Degree Days (base 65) 0 0 0 0
Cooling Degree Days (base 65) 14 6 1 45
Growing Degree Days (base 50) 28 21 16 149
Dew Point  
Dew Point 72 °F 58 °F 43 °F
Precipitation  
Precipitation 0.75 in 0.13 in 0.00 in 0.77 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 35 mph 6 mph 0 mph
Gust Wind 45 mph 24 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.27 in 30.06 in 29.74 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Aug. 16, 2013 Rise Set
Actual Time 6:24 AM EDT 8:02 PM EDT
Civil Twilight 5:56 AM EDT 8:31 PM EDT
Nautical Twilight 5:21 AM EDT 9:05 PM EDT
Astronomical Twilight 4:45 AM EDT 9:41 PM EDT
Moon 4:18 PM EDT (8/16) 1:26 AM EDT (8/16)
Length of Visible Light 14h 35m
Length of Day
13h 38m
Waxing Gibbous, 74% of the Moon is Illuminated
Aug 16
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter

Daily Weather History & Observations

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Aug high avg low high avg low high avg low high avg low high avg low high avg high sum  
11 84 77 69 70 66 59 90 68 46 30.12 30.07 30.01 10 10 10 13 5 18 T  
12 89 79 68 72 67 61 100 70 40 30.04 30.00 29.92 10 7 0 14 3 18 0.02 Fog
13 86 78 69 72 69 64 93 72 51 29.90 29.80 29.74 10 6 0 35 6 45 0.75 Fog , Rain , Thunderstorm
14 75 66 56 58 49 46 80 58 36 30.12 29.99 29.85 10 10 10 23 12 30 0.00  
15 78 66 53 53 49 43 89 60 30 30.20 30.15 30.10 10 10 10 8 5 18 0.00  
16 78 66 53 57 53 51 93 68 43 30.21 30.17 30.14 10 10 10 10 3 18 0.00  
17 80 68 55 58 55 53 93 68 42 30.27 30.24 30.22 10 10 10 14 5 17 0.00