Weather History for KIAD - December, 2011

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 62 °F 51 °F 40 °F
Mean Temperature 59 °F 42 °F 32 °F
Min Temperature 56 °F 31 °F 19 °F
Degree Days  
Heating Degree Days (base 65) 33 23 6 723
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 8 0 0 12
Dew Point  
Dew Point 61 °F 32 °F 12 °F
Precipitation  
Precipitation 2.14 in 0.17 in 0.00 in 4.46 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 29 mph 6 mph 0 mph
Gust Wind 41 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.70 in 30.19 in 29.43 in

Monthly Weather History Graph

Monthly Weather History Graph

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Astronomy

Dec. 18, 2011 Rise Set
Actual Time 7:23 AM EST 4:49 PM EST
Civil Twilight 6:53 AM EST 5:19 PM EST
Nautical Twilight 6:19 AM EST 5:53 PM EST
Astronomical Twilight 5:47 AM EST 6:25 PM EST
Moon 12:24 AM EST (12/18) 12:11 PM EST (12/18)
Length of Visible Light 10h 26m
Length of Day
9h 26m
Last Quarter, 42% of the Moon is Illuminated
Dec 18
Last Quarter
Dec 24
New
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter

Daily Weather History & Observations

2011 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  
1 50 39 28 29 27 25 85 62 39 30.35 30.29 30.15 10 10 10 15 7 20 0.00  
2 57 40 23 32 27 22 92 62 32 30.57 30.39 30.31 10 10 10 16 3 26 0.00  
3 50 38 26 31 28 23 92 71 50 30.68 30.61 30.57 10 10 6 8 3 16 0.00  
4 55 42 29 40 35 27 100 74 47 30.56 30.47 30.39 10 9 6 17 5 21 0.00 Fog
5 59 48 36 54 44 36 92 77 61 30.37 30.27 30.14 10 10 10 13 4 16 0.00  
6 62 59 56 61 59 55 100 90 80 30.11 30.01 29.90 10 9 4 15 8 22 0.21 Rain
7 62 50 37 61 50 34 100 93 86 29.90 29.75 29.58 10 4 1 28 10 36 2.14 Rain
8 45 37 29 32 25 22 92 69 45 30.35 30.19 29.88 10 10 10 25 8 41 0.00  
9 51 38 25 31 28 24 92 67 42 30.34 30.28 30.22 10 10 10 15 3 20 0.00  
10 46 37 27 29 21 13 82 58 33 30.55 30.38 30.25 10 10 10 20 8 32 0.00  
11 42 32 21 20 17 12 84 57 30 30.70 30.63 30.55 10 10 10 9 1 12 0.00  
12 44 32 19 29 23 17 92 69 45 30.63 30.55 30.48 10 10 8 13 1 15 0.00  
13 50 36 22 27 24 20 88 64 39 30.49 30.44 30.39 10 10 8 16 4 21 0.00  
14 49 41 32 34 31 28 89 70 50 30.44 30.37 30.27 10 10 10 9 3 14 T Rain
15 62 52 42 50 41 33 70 63 55 30.25 30.02 29.87 10 10 10 22 12 30 T Rain
16 62 51 39 50 29 24 77 58 39 30.25 30.14 29.88 10 10 10 28 11 36 0.00  
17 40 34 27 27 24 21 92 70 48 30.24 30.21 30.17 10 10 10 18 7 23 0.00  
18 43 35 26 25 24 22 84 65 45 30.35 30.28 30.21 10 10 10 15 5 21 0.00  
19 52 38 24 30 26 21 81 61 41 30.31 30.18 30.07 10 10 10 16 7 20 0.00  
20 56 50 43 39 36 32 71 61 51 30.18 30.12 30.08 10 10 10 8 3 13 0.00  
21 61 53 44 57 50 37 93 80 66 30.07 29.90 29.79 10 10 8 21 7 28 0.08 Fog , Rain
22 60 50 40 51 45 40 100 77 53 30.14 29.99 29.83 10 7 1 13 3 16 1.12 Fog , Rain
23 50 46 42 48 39 32 100 78 56 30.25 30.05 29.77 10 9 2 22 9 29 0.20 Rain
24 45 37 28 36 27 22 85 63 41 30.48 30.39 30.24 10 10 10 23 6 31 T Rain
25 49 37 24 32 26 22 92 69 46 30.40 30.20 30.03 10 10 9 12 4 15 0.00  
26 48 40 31 27 26 24 78 60 42 30.34 30.25 30.04 10 10 10 26 11 36 0.00  
27 46 42 38 43 37 26 100 78 55 30.20 29.69 29.43 10 6 0 15 7 23 0.71 Fog , Rain
28 45 38 30 34 25 17 92 68 43 30.03 29.80 29.54 10 10 10 29 13 37 0.00  
29 41 32 22 29 24 19 88 71 54 30.08 30.02 29.96 10 10 10 12 3 14 0.00  
30 54 40 26 37 31 25 92 68 44 30.05 29.96 29.86 10 10 10 12 3 17 0.00  
31 59 48 37 45 39 36 100 74 47 30.12 29.94 29.83 10 10 10 22 7 26 T Rain