Weather History for Dulles Airport, VA

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 71 °F 50 °F 36 °F
Mean Temperature 60 °F 42 °F 30 °F
Min Temperature 48 °F 33 °F 21 °F
Degree Days  
Heating Degree Days (base 65) 35 23 5 709
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 10 1 0 21
Dew Point  
Dew Point 57 °F 33 °F 17 °F
Precipitation  
Precipitation 1.41 in 0.10 in 0.00 in 2.87 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 41 mph 7 mph 0 mph
Gust Wind 51 mph 26 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.48 in 30.03 in 29.30 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 08, 2012 Rise Set
Actual Time 7:16 AM EST 4:47 PM EST
Civil Twilight 6:46 AM EST 5:17 PM EST
Nautical Twilight 6:13 AM EST 5:50 PM EST
Astronomical Twilight 5:40 AM EST 6:22 PM EST
Moon 1:41 AM EST (12/8) 1:14 PM EST (12/8)
Length of Visible Light 10h 30m
Length of Day
9h 31m
Waning Crescent, 28% of the Moon is Illuminated
Dec 8
Waning Crescent
Dec 13
New
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 2.87 Normal Month Total: 2.96
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Fog
Actual:
47 | 28 0.00
Average:
51 | 31 0.11
Rain
Actual:
56 | 29 0.02
Average:
51 | 31 0.11
Partly Cloudy
Actual:
69 | 41 0.00
Average:
50 | 30 0.11
Partly Cloudy
Actual:
71 | 48 0.00
Average:
50 | 30 0.11
Partly Cloudy
Actual:
61 | 37 0.00
Average:
49 | 30 0.11
Partly Cloudy
Actual:
45 | 26 0.00
Average:
49 | 29 0.11
Rain
Actual:
51 | 36 0.01
Average:
49 | 29 0.11
Mostly Cloudy
Actual:
62 | 42 0.00
Average:
48 | 29 0.10
Rain
Actual:
53 | 47 0.16
Average:
48 | 29 0.11
Fog
Actual:
63 | 48 0.00
Average:
47 | 28 0.11
Rain
Actual:
52 | 38 0.01
Average:
47 | 28 0.10
Partly Cloudy
Actual:
45 | 35 0.00
Average:
47 | 28 0.11
Scattered Clouds
Actual:
49 | 26 0.00
Average:
46 | 28 0.09
Scattered Clouds
Actual:
53 | 21 0.00
Average:
46 | 27 0.10
Mostly Cloudy
Actual:
53 | 28 T
Average:
46 | 27 0.09
Rain
Actual:
48 | 43 T
Average:
46 | 27 0.10
Rain
Actual:
53 | 45 0.04
Average:
45 | 27 0.09
Rain
Actual:
58 | 31 T
Average:
45 | 26 0.09
Partly Cloudy
Actual:
53 | 29 0.00
Average:
45 | 26 0.09
Rain
Actual:
52 | 32 0.50
Average:
45 | 26 0.08
Rain
Actual:
55 | 36 0.42
Average:
44 | 26 0.09
Partly Cloudy
Actual:
42 | 32 0.00
Average:
44 | 26 0.09
Scattered Clouds
Actual:
47 | 21 0.00
Average:
44 | 25 0.09
Snow
Actual:
38 | 23 0.20
Average:
44 | 25 0.09
Fog
Actual:
47 | 31 0.00
Average:
44 | 25 0.09
Snow
Actual:
39 | 31 1.41
Average:
43 | 25 0.09
Rain
Actual:
41 | 34 0.01
Average:
43 | 25 0.08
Partly Cloudy
Actual:
41 | 31 0.00
Average:
43 | 25 0.08
Snow
Actual:
42 | 33 0.09
Average:
43 | 25 0.08
Partly Cloudy
Actual:
40 | 29 0.00
Average:
43 | 25 0.08
Partly Cloudy
Actual:
36 | 23 0.00
Average:
43 | 24 0.07
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

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  
1 47 38 28 38 33 26 100 86 71 30.46 30.41 30.35 10 4 0 12 3 22 0.00 Fog
2 56 43 29 49 38 28 100 83 66 30.40 30.27 30.15 10 4 0 12 3 15 0.02 Fog , Rain
3 69 55 41 53 48 41 100 77 53 30.27 30.21 30.15 10 9 5 8 2 13 0.00  
4 71 60 48 53 50 47 96 72 47 30.23 30.15 30.01 10 10 7 15 6 18 0.00  
5 61 49 37 47 34 22 62 48 33 30.31 30.15 29.99 10 10 10 24 13 31 0.00  
6 45 36 26 29 22 20 81 59 37 30.40 30.32 30.25 10 10 10 14 5 16 0.00  
7 51 44 36 45 37 29 86 74 61 30.23 30.10 29.97 10 10 10 15 5 18 0.01 Rain
8 62 52 42 50 46 39 96 81 65 30.02 29.94 29.89 10 7 0 9 3 13 0.00  
9 53 50 47 50 48 46 100 93 86 30.18 30.11 29.97 7 3 0 13 4 17 0.16 Fog , Rain
10 63 56 48 57 54 44 100 89 78 29.95 29.72 29.59 10 6 0 25 9 32 0.00 Fog
11 52 45 38 40 33 27 76 61 46 30.24 29.98 29.71 10 10 10 25 9 32 0.01 Rain
12 45 40 35 27 26 25 70 58 45 30.44 30.37 30.24 10 10 10 13 6 15 0.00  
13 49 38 26 27 24 20 78 56 34 30.48 30.42 30.36 10 10 10 9 4 12 0.00  
14 53 37 21 27 24 19 92 61 29 30.35 30.30 30.23 10 10 9 8 2 10 0.00  
15 53 41 28 36 29 25 92 67 42 30.31 30.22 30.13 10 10 10 10 3 29 T  
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  
23 47 34 21 23 20 17 84 58 31 30.07 30.00 29.91 10 10 10 13 3 17 0.00  
24 38 31 23 34 29 21 100 85 70 30.10 29.99 29.91 10 5 0 10 2 13 0.20 Fog , Rain , Snow
25 47 39 31 37 33 29 100 77 53 30.25 30.11 29.93 10 5 0 17 5 24 0.00 Fog
26 39 35 31 34 31 25 100 82 64 30.25 29.86 29.44 10 4 0 22 11 29 1.41 Fog , Rain , Snow
27 41 38 34 34 28 24 96 78 59 30.03 29.73 29.45 10 9 5 37 19 46 0.01 Rain
28 41 36 31 27 25 24 75 65 54 30.16 30.09 30.03 10 10 10 15 6 21 0.00  
29 42 38 33 35 30 26 96 80 64 30.01 29.76 29.59 10 7 1 35 8 43 0.09 Snow
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