Weather History for Gillette, WY

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Month of December, 2009

  Max Avg Min Sum
Temperature  
Max Temperature 48 °F 25 °F 5 °F
Mean Temperature 40 °F 15 °F -6 °F
Min Temperature 31 °F 4 °F -19 °F
Degree Days  
Heating Degree Days (base 65) 71 50 25 1547
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 31 °F 8 °F -24 °F
Precipitation  
Precipitation 0.06 in 0.01 in 0.00 in 0.22 in
Snowdepth - - - -
Wind  
Wind 32 mph 10 mph 0 mph
Gust Wind 40 mph 27 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.51 in 30.07 in 29.61 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 07, 2009 Rise Set
Actual Time 7:24 AM MST 4:22 PM MST
Civil Twilight 6:51 AM MST 4:55 PM MST
Nautical Twilight 6:15 AM MST 5:32 PM MST
Astronomical Twilight 5:39 AM MST 6:07 PM MST
Moon 10:58 PM MST (12/7) 11:31 AM MST (12/7)
Length of Visible Light 10h 04m
Length of Day
8h 58m
Waning Gibbous, 64% of the Moon is Illuminated
Dec 7
Waning Gibbous
Dec 8
Last Quarter
Dec 16
New
Dec 24
First Quarter
Dec 31
Full

Weather History Calendar

Precipitation Actual month total 0.22 Average Month Total: 0.51
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
42 | 10 T
Average:
37 | 16 0.04
Snow
Actual:
22 | 8 0.01
Average:
35 | 14 0.03
Snow
Actual:
15 | -5 T
Average:
39 | 16 0.00
Scattered Clouds
Actual:
30 | 6 0.00
Average:
39 | 19 0.02
Snow
Actual:
25 | 2 T
Average:
35 | 15 0.02
Snow
Actual:
9 | -9 0.04
Average:
36 | 14 0.01
Snow
Actual:
6 | -19 T
Average:
34 | 14 0.02
Snow
Actual:
5 | -13 0.03
Average:
35 | 12 0.01
Clear
Actual:
5 | -18 0.00
Average:
36 | 13 0.01
Clear
Actual:
19 | -4 0.00
Average:
38 | 14 0.02
Clear
Actual:
27 | 9 0.00
Average:
36 | 14 0.00
Scattered Clouds
Actual:
36 | 4 0.00
Average:
36 | 15 0.01
Snow
Actual:
6 | -5 T
Average:
32 | 11 0.00
Snow
Actual:
17 | -10 0.01
Average:
35 | 14 0.02
Clear
Actual:
37 | -2 0.00
Average:
34 | 12 0.02
Clear
Actual:
42 | 17 0.00
Average:
33 | 12 0.02
Partly Cloudy
Actual:
44 | 21 T
Average:
36 | 16 0.01
Scattered Clouds
Actual:
38 | 18 0.00
Average:
34 | 12 0.03
Scattered Clouds
Actual:
40 | 24 0.00
Average:
28 | 9 0.01
Partly Cloudy
Actual:
48 | 31 0.00
Average:
28 | 8 0.01
Scattered Clouds
Actual:
44 | 25 0.00
Average:
29 | 9 0.01
Fog
Actual:
40 | 23 0.00
Average:
30 | 11 0.02
Snow
Actual:
23 | -10 0.06
Average:
30 | 9 0.01
Snow
Actual:
15 | -10 T
Average:
28 | 9 0.05
Snow
Actual:
9 | 0 0.06
Average:
32 | 8 0.01
Snow
Actual:
17 | 9 0.01
Average:
31 | 13 0.02
Partly Cloudy
Actual:
22 | 0 0.00
Average:
31 | 12 0.02
Clear
Actual:
27 | 3 0.00
Average:
31 | 9 0.00
Clear
Actual:
29 | 8 0.00
Average:
28 | 6 0.01
Partly Cloudy
Actual:
28 | 15 0.00
Average:
25 | 6 0.02
Partly Cloudy
Actual:
23 | 1 T
Average:
27 | 7 0.03
 

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

2009 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 42 26 10 23 17 5 81 57 33 30.26 30.00 29.69 10 6 1 29 14 36 T Snow
2 22 15 8 11 8 2 84 71 57 30.35 30.20 30.07 10 7 0 26 15 32 0.01 Fog , Snow
3 15 5 -5 7 3 -5 88 78 67 30.43 30.31 30.16 10 8 2 22 10 26 T Snow
4 30 18 6 13 5 -4 69 56 42 30.23 29.95 29.82 10 10 10 18 11 22 0.00  
5 25 14 2 15 8 -1 88 72 55 30.23 29.99 29.78 10 9 4 25 10 31 T Snow
6 9 0 -9 4 -2 -12 88 82 76 30.43 30.19 30.05 10 5 2 16 9 18 0.04 Snow
7 6 -6 -19 0 -7 -24 86 78 69 30.42 30.14 29.90 10 7 2 18 6 21 T Snow
8 5 -4 -13 0 -7 -18 86 79 72 30.22 29.91 29.71 10 3 1 20 10 23 0.03 Snow
9 5 -6 -18 -7 -13 -23 77 67 57 30.20 30.05 29.71 10 10 10 20 9 23 0.00  
10 19 8 -4 1 -6 -11 68 56 43 30.05 29.99 29.95 10 10 10 25 12 35 0.00  
11 27 18 9 12 5 -4 62 54 46 29.98 29.89 29.71 10 10 10 26 17 33 0.00  
12 36 20 4 23 12 1 87 65 42 29.78 29.69 29.61 10 10 4 29 15 35 0.00  
13 6 1 -5 1 -4 -9 87 80 72 30.06 29.76 29.61 10 5 1 13 7 15 T Snow
14 17 4 -10 12 -4 -15 87 80 73 30.44 30.10 29.78 10 6 1 21 7 23 0.01 Snow
15 37 18 -2 21 13 -5 83 66 48 30.34 30.19 30.08 10 10 10 28 17 33 0.00  
16 42 30 17 29 22 13 88 72 56 30.18 30.11 30.01 10 10 10 20 5 22 0.00  
17 44 33 21 31 26 19 85 71 57 30.25 30.18 30.13 10 10 10 20 8 23 T  
18 38 28 18 26 20 14 84 69 54 30.32 30.26 30.18 10 10 10 16 8 18 0.00  
19 40 32 24 22 18 13 68 56 44 30.19 30.10 29.96 10 10 10 21 10 24 0.00  
20 48 40 31 29 26 22 82 64 45 30.11 30.01 29.83 10 10 10 16 6 18 0.00  
21 44 35 25 31 27 23 85 72 58 29.89 29.82 29.74 10 10 10 15 5 18 0.00  
22 40 32 23 27 23 19 88 74 59 29.95 29.81 29.71 10 8 0 18 7 21 0.00 Fog
23 23 7 -10 20 12 -13 88 82 76 30.43 30.05 29.87 10 3 0 26 12 35 0.06 Fog , Snow
24 15 3 -10 6 -2 -11 86 74 61 30.43 30.23 29.98 10 10 3 21 9 25 T Snow
25 9 5 0 4 0 -6 86 77 68 30.30 30.09 29.98 6 2 0 32 22 39 0.06 Snow
26 17 13 9 11 7 3 83 78 73 30.37 30.22 30.05 10 5 1 31 18 40 0.01 Snow
27 22 11 0 13 8 2 80 74 67 30.44 30.39 30.34 10 10 10 18 6 21 0.00  
28 27 15 3 14 7 -3 76 65 53 30.51 30.37 30.17 10 10 10 15 3 21 0.00  
29 29 19 8 16 11 4 77 67 57 30.17 30.03 29.95 10 10 10 16 4 18 0.00  
30 28 22 15 15 11 7 74 65 55 30.10 29.97 29.90 10 10 10 14 7 16 0.00  
31 23 12 1 15 9 -1 86 77 67 30.33 30.22 30.10 10 10 9 18 6 21 T