Weather History for Dulles Airport, VA

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Week of December 30, 2012 through January 5, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 45 °F 41 °F 36 °F
Mean Temperature 37 °F 33 °F 30 °F
Min Temperature 29 °F 26 °F 21 °F
Degree Days  
Heating Degree Days (base 65) 35 32 28 221
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 29 °F 20 °F 11 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 37 mph 7 mph 0 mph
Gust Wind 47 mph 26 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.39 in 30.16 in 29.85 in

Weekly Weather History Graph

Weekly Weather History Graph

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Date:

Astronomy

Dec. 31, 2012 Rise Set
Actual Time 7:28 AM EST 4:57 PM EST
Civil Twilight 6:58 AM EST 5:27 PM EST
Nautical Twilight 6:25 AM EST 6:01 PM EST
Astronomical Twilight 5:52 AM EST 6:33 PM EST
Moon 8:24 PM EST (12/31) 9:10 AM EST (12/31)
Length of Visible Light 10h 29m
Length of Day
9h 29m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

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  
30 40 35 29 25 21 18 69 55 40 30.35 30.15 29.85 10 10 10 37 18 47 0.00  
31 36 30 23 24 21 18 81 67 52 30.33 30.19 30.00 10 10 10 10 3 14 0.00  
2013 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  
1 43 36 28 29 27 22 78 67 56 30.02 29.98 29.92 10 10 10 10 3 13 0.00  
2 38 33 28 27 18 11 70 55 40 30.25 30.12 30.01 10 10 10 16 8 20 T  
3 39 30 21 19 17 13 77 59 40 30.27 30.21 30.16 10 10 10 10 3 13 0.00  
4 44 33 22 20 18 17 81 60 39 30.22 30.18 30.13 10 10 10 18 7 23 0.00  
5 45 37 28 25 20 17 63 48 33 30.39 30.28 30.16 10 10 10 18 6 23 0.00