Dulles Airport, VA

12:56 PM EDT on October 14, 2019 (GMT -0400)
Washington Dulles International

Weather History for KIAD - August, 2019

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Month of August, 2019

  Max Avg Min Sum
Temperature  
Max Temperature 94 °F 90 °F 85 °F
Mean Temperature 82 °F 78 °F 72 °F
Min Temperature 73 °F 66 °F 58 °F
Degree Days  
Heating Degree Days (base 65) 0 0 0 0
Cooling Degree Days (base 65) 17 13 7 237
Growing Degree Days (base 50) 32 28 20 498
Dew Point  
Dew Point 74 °F 64 °F 49 °F
Precipitation  
Precipitation 2.18 in 0.18 in 0.00 in 2.83 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 47 mph 5 mph 0 mph
Gust Wind 66 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.14 in 29.93 in 29.74 in

Monthly Weather History Graph

Monthly 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

Daily Weather History & Observations

2019 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  
1 92 78 63 67 65 60 93 66 38 30.11 30.07 30.03 10 8 0 14 4 17 0.00 Fog
2 88 79 69 68 64 59 84 62 39 30.14 30.09 30.05 10 10 10 15 6 22 0.00  
3 89 79 68 70 68 65 97 72 46 30.06 30.00 29.91 10 9 1 12 4 15 T Fog , Rain , Thunderstorm
4 92 80 67 70 62 53 90 61 31 29.96 29.94 29.90 10 10 10 15 6 18 0.00  
5 88 76 64 66 63 59 84 64 43 30.00 29.95 29.92 10 10 10 13 5 16 0.00  
6 93 78 63 67 65 63 93 66 38 29.92 29.85 29.78 10 10 8 15 4 20 T Rain
7 92 80 67 70 67 64 97 71 44 29.83 29.79 29.74 10 9 2 26 5 41 0.39 Rain , Thunderstorm
8 92 78 64 67 62 57 100 66 32 29.81 29.78 29.74 10 10 9 20 6 24 0.00 Fog
9 92 80 67 63 59 52 81 56 30 29.87 29.81 29.76 10 10 10 21 8 26 0.00  
10 85 72 58 55 53 51 72 53 34 29.98 29.92 29.88 10 10 10 16 6 25 0.00  
11 86 72 58 56 53 49 84 57 29 30.09 30.03 29.99 10 10 10 12 5 16 0.00  
12 94 76 58 66 60 54 87 62 36 30.03 29.96 29.87 10 10 9 16 6 22 0.00  
13 86 80 73 72 69 63 93 76 58 29.87 29.80 29.74 10 9 2 18 5 25 0.25 Rain , Thunderstorm
14 89 80 71 72 70 66 93 72 50 29.90 29.82 29.76 10 9 2 16 5 21 0.00 Fog
15 85 76 66 71 69 63 97 80 63 30.00 29.95 29.90 10 8 1 47 5 66 2.18 Rain , Thunderstorm
16 88 79 70 72 70 68 97 76 55 30.03 29.98 29.94 10 8 2 9 3 12 0.00 Fog
17 93 82 70 74 70 64 100 71 41 30.03 29.98 29.93 10 7 0 17 3 20 0.00 Fog , Rain , Thunderstorm
18 94 82 70 72 69 64 100 72 44 30.01 29.98 29.94 10 10 7 17 4 23 0.01 Rain
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