Weather History for Dulles Airport, VA

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Week of December 16, 2012 through December 22, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 58 °F 52 °F 42 °F
Mean Temperature 49 °F 44 °F 37 °F
Min Temperature 45 °F 35 °F 29 °F
Degree Days  
Heating Degree Days (base 65) 28 21 16 149
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 54 °F 36 °F 19 °F
Precipitation  
Precipitation 0.50 in 0.19 in 0.00 in 0.96 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 41 mph 10 mph 0 mph
Gust Wind 51 mph 27 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.20 in 29.79 in 29.30 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Dec. 22, 2012 Rise Set
Actual Time 7:25 AM EST 4:51 PM EST
Civil Twilight 6:55 AM EST 5:21 PM EST
Nautical Twilight 6:22 AM EST 5:55 PM EST
Astronomical Twilight 5:49 AM EST 6:27 PM EST
Moon 1:06 PM EST (12/22) 2:10 AM EST (12/22)
Length of Visible Light 10h 26m
Length of Day
9h 26m
Waxing Gibbous, 73% of the Moon is Illuminated
Dec 22
Waxing Gibbous
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
16 48 46 43 45 42 39 96 81 65 30.13 29.96 29.86 10 8 4 16 4 21 T Rain
17 53 49 45 52 48 44 100 93 86 29.86 29.74 29.55 7 2 0 14 5 16 0.04 Fog , Rain
18 58 45 31 52 41 28 100 74 47 29.83 29.64 29.54 10 7 0 28 10 36 T Fog , Rain
19 53 41 29 36 32 26 92 71 50 30.18 29.97 29.81 10 10 10 21 7 25 0.00  
20 52 42 32 49 36 30 96 75 53 30.20 29.93 29.39 10 8 4 22 7 32 0.50 Rain
21 55 46 36 54 32 19 100 72 44 29.58 29.41 29.30 10 9 2 35 14 43 0.42 Rain
22 42 37 32 23 20 19 59 49 39 30.06 29.85 29.59 10 10 10 41 22 51 0.00