Weather History for Dulles Airport, VA

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Week of January 8, 2012 through January 14, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 59 °F 48 °F 36 °F
Mean Temperature 50 °F 38 °F 30 °F
Min Temperature 40 °F 28 °F 23 °F
Degree Days  
Heating Degree Days (base 65) 35 27 15 186
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 47 °F 28 °F 12 °F
Precipitation  
Precipitation 0.59 in 0.17 in 0.00 in 1.18 in
Snowdepth 1.0 in 0.1 in 0.0 in -
Wind  
Wind 31 mph 6 mph 0 mph
Gust Wind 41 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.35 in 29.94 in 29.32 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Jan. 13, 2012 Rise Set
Actual Time 7:27 AM EST 5:09 PM EST
Civil Twilight 6:58 AM EST 5:38 PM EST
Nautical Twilight 6:25 AM EST 6:11 PM EST
Astronomical Twilight 5:53 AM EST 6:43 PM EST
Moon 10:16 PM EST (1/13) 9:44 AM EST (1/13)
Length of Visible Light 10h 40m
Length of Day
9h 41m
Waning Gibbous, 79% of the Moon is Illuminated
Jan 13
Waning Gibbous
Jan 16
Last Quarter
Jan 23
New
Jan 30
First Quarter
Feb 7
Full

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Jan high avg low high avg low high avg low high avg low high avg low high avg high sum  
8 50 40 30 30 26 23 78 60 41 30.34 30.25 30.09 10 10 10 16 5 28 0.00  
9 39 33 26 32 28 21 96 78 59 30.35 30.20 30.05 10 5 0 12 2 16 0.09 Fog , Snow
10 53 41 28 36 30 26 100 72 44 30.06 30.03 29.99 10 5 0 14 4 18 0.00 Fog
11 47 36 24 45 35 23 100 92 84 30.04 29.87 29.51 10 7 2 22 5 31 0.59 Rain
12 59 50 40 47 43 39 100 83 66 29.54 29.48 29.37 10 8 2 20 7 29 0.46 Rain
13 52 39 25 44 21 12 77 57 37 29.99 29.66 29.32 10 10 5 31 12 41 0.04 Rain
14 36 30 23 15 14 12 68 56 43 30.18 30.09 29.99 10 10 10 20 8 26 0.00