Weather History for Dulles Airport, VA

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Month of January, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 72 °F 46 °F 22 °F
Mean Temperature 64 °F 38 °F 17 °F
Min Temperature 56 °F 29 °F 9 °F
Degree Days  
Heating Degree Days (base 65) 48 27 1 848
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 14 1 0 16
Dew Point  
Dew Point 61 °F 26 °F -6 °F
Precipitation  
Precipitation 2.00 in 0.14 in 0.00 in 3.70 in
Snowdepth 1.0 in 0.1 in 0.0 in -
Wind  
Wind 35 mph 7 mph 0 mph
Gust Wind 46 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.61 in 30.17 in 29.16 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jan. 30, 2013 Rise Set
Actual Time 7:17 AM EST 5:29 PM EST
Civil Twilight 6:49 AM EST 5:57 PM EST
Nautical Twilight 6:17 AM EST 6:29 PM EST
Astronomical Twilight 5:46 AM EST 7:00 PM EST
Moon 9:22 PM EST (1/30) 8:46 AM EST (1/30)
Length of Visible Light 11h 07m
Length of Day
10h 11m
Waning Gibbous, 88% of the Moon is Illuminated
Jan 30
Waning Gibbous
Feb 3
Last Quarter
Feb 10
New
Feb 17
First Quarter
Feb 25
Full

Weather History Calendar

Precipitation Actual month total 3.70 Normal Month Total: 2.68
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Overcast
Actual:
43 | 28 0.00
Average:
43 | 24 0.08
Partly Cloudy
Actual:
38 | 28 T
Average:
43 | 24 0.08
Partly Cloudy
Actual:
39 | 21 0.00
Average:
42 | 24 0.07
Scattered Clouds
Actual:
44 | 22 0.00
Average:
42 | 24 0.08
Partly Cloudy
Actual:
45 | 28 0.00
Average:
42 | 24 0.09
Partly Cloudy
Actual:
51 | 27 T
Average:
42 | 24 0.08
Partly Cloudy
Actual:
45 | 24 0.00
Average:
42 | 24 0.09
Scattered Clouds
Actual:
53 | 23 0.00
Average:
42 | 24 0.08
Rain
Actual:
50 | 26 0.02
Average:
42 | 24 0.08
Partly Cloudy
Actual:
55 | 37 0.00
Average:
42 | 24 0.08
Rain
Actual:
45 | 31 0.02
Average:
42 | 24 0.09
Fog
Actual:
54 | 41 0.00
Average:
42 | 24 0.09
Rain
Actual:
57 | 43 0.01
Average:
42 | 24 0.08
Rain
Actual:
59 | 40 0.12
Average:
42 | 24 0.09
Rain
Actual:
40 | 35 0.63
Average:
42 | 24 0.09
Rain
Actual:
41 | 34 0.29
Average:
42 | 24 0.08
Overcast
Actual:
44 | 37 T
Average:
42 | 24 0.09
Scattered Clouds
Actual:
38 | 29 0.00
Average:
42 | 24 0.08
Clear
Actual:
56 | 29 0.00
Average:
42 | 24 0.09
Scattered Clouds
Actual:
58 | 35 0.00
Average:
42 | 24 0.09
Partly Cloudy
Actual:
48 | 29 0.00
Average:
43 | 24 0.09
Scattered Clouds
Actual:
29 | 16 0.00
Average:
43 | 24 0.09
Partly Cloudy
Actual:
26 | 9 T
Average:
43 | 24 0.09
Snow
Actual:
27 | 13 0.05
Average:
43 | 24 0.09
Snow
Actual:
22 | 12 0.03
Average:
43 | 24 0.09
Snow
Actual:
33 | 22 T
Average:
43 | 24 0.09
Partly Cloudy
Actual:
39 | 20 0.00
Average:
43 | 24 0.08
Rain
Actual:
46 | 31 0.21
Average:
43 | 24 0.10
Partly Cloudy
Actual:
70 | 35 0.00
Average:
43 | 24 0.09
Rain
Actual:
72 | 56 2.00
Average:
43 | 24 0.09
Rain
Actual:
59 | 29 0.32
Average:
44 | 24 0.10
 

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

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  
6 51 39 27 30 27 24 92 65 38 30.19 30.12 30.04 10 10 10 16 5 20 T  
7 45 35 24 30 24 21 84 63 41 30.45 30.36 30.17 10 10 8 20 7 24 0.00  
8 53 38 23 31 28 21 88 66 44 30.43 30.39 30.37 10 10 8 12 4 15 0.00  
9 50 38 26 39 32 24 92 73 54 30.39 30.34 30.25 10 9 6 21 3 28 0.02 Rain
10 55 46 37 29 26 23 60 45 29 30.61 30.51 30.40 10 10 10 25 6 31 0.00  
11 45 38 31 41 35 27 96 77 57 30.50 30.27 30.11 10 5 0 10 3 15 0.02 Fog , Rain
12 54 48 41 46 43 40 100 89 77 30.18 30.14 30.11 10 2 0 9 2 12 0.00 Fog
13 57 50 43 56 50 43 100 96 92 30.14 30.05 29.97 0 0 0 12 4 17 0.01 Fog , Rain
14 59 50 40 57 47 34 100 77 54 30.31 30.13 29.96 10 9 4 17 10 23 0.12 Rain
15 40 38 35 37 36 33 92 89 85 30.35 30.27 30.17 10 6 2 12 7 15 0.63 Rain
16 41 38 34 39 35 33 100 96 92 30.16 30.05 29.88 10 6 2 16 4 22 0.29 Rain
17 44 41 37 39 31 26 100 77 53 30.13 30.08 30.01 10 10 7 15 6 20 T  
18 38 34 29 28 17 9 75 54 32 30.49 30.38 30.11 10 10 10 24 9 29 0.00  
19 56 43 29 27 25 21 72 52 32 30.40 30.22 29.96 10 10 10 20 12 26 0.00  
20 58 47 35 30 21 7 70 45 20 30.09 29.93 29.84 10 10 10 29 12 35 0.00  
21 48 39 29 23 17 11 58 46 33 30.10 29.99 29.80 10 10 10 28 9 33 0.00  
22 29 23 16 10 -2 -6 50 39 27 30.30 30.18 29.97 10 10 9 28 14 35 0.00  
23 26 18 9 6 0 -3 66 49 32 30.36 30.27 30.15 10 10 10 18 6 29 T  
24 27 20 13 16 10 -1 84 59 33 30.53 30.26 30.09 10 5 1 28 9 37 0.05 Snow
25 22 17 12 16 9 0 84 63 41 30.53 30.27 30.07 10 8 1 15 4 18 0.03 Snow
26 33 28 22 25 21 17 84 73 61 30.45 30.24 30.10 10 9 2 12 4 14 T Snow
27 39 30 20 21 17 15 91 66 40 30.61 30.52 30.45 10 10 7 9 3 13 0.00  
28 46 39 31 40 32 21 92 77 61 30.47 30.27 30.06 10 6 2 17 8 23 0.21 Rain
29 70 53 35 51 46 36 96 74 51 30.12 30.05 29.97 10 9 4 13 6 18 0.00  
30 72 64 56 61 56 50 100 84 68 29.94 29.63 29.22 10 8 2 28 12 36 2.00 Rain
31 59 44 29 56 27 12 100 69 38 29.91 29.61 29.16 10 9 4 35 17 46 0.32 Rain