Weather History for Riverton, WY

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 60 °F 33 °F 2 °F
Mean Temperature 44 °F 22 °F -5 °F
Min Temperature 30 °F 10 °F -12 °F
Degree Days  
Heating Degree Days (base 65) 70 43 21 1341
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 34 °F 8 °F -17 °F
Precipitation  
Precipitation 0.16 in 0.01 in 0.00 in 0.41 in
Snowdepth 3.0 in 0.8 in 0.0 in -
Wind  
Wind 40 mph 7 mph 0 mph
Gust Wind 51 mph 27 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.42 in 29.97 in 29.49 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 30, 2012 Rise Set
Actual Time 7:45 AM MST 4:48 PM MST
Civil Twilight 7:12 AM MST 5:20 PM MST
Nautical Twilight 6:37 AM MST 5:56 PM MST
Astronomical Twilight 6:02 AM MST 6:30 PM MST
Moon 7:26 PM MST (12/30) 8:52 AM MST (12/30)
Length of Visible Light 10h 07m
Length of Day
9h 03m
Waning Gibbous, 95% of the Moon is Illuminated
Dec 30
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Weather History Calendar

Precipitation Actual month total 0.41 Normal Month Total: 0.32
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Scattered Clouds
Actual:
55 | 30 0.00
Average:
34 | 11 0.01
Rain
Actual:
60 | 27 0.01
Average:
34 | 11 0.01
Snow
Actual:
46 | 28 0.00
Average:
34 | 10 0.01
Clear
Actual:
45 | 23 0.00
Average:
33 | 10 0.01
Clear
Actual:
56 | 26 0.00
Average:
33 | 10 0.01
Clear
Actual:
46 | 23 0.00
Average:
33 | 9 0.01
Scattered Clouds
Actual:
38 | 18 0.00
Average:
33 | 9 0.01
Snow
Actual:
30 | 14 0.02
Average:
32 | 9 0.01
Snow
Actual:
19 | 5 0.01
Average:
32 | 8 0.01
Scattered Clouds
Actual:
30 | 7 0.00
Average:
32 | 8 0.00
Clear
Actual:
34 | 5 0.00
Average:
32 | 8 0.01
Clear
Actual:
47 | 17 0.00
Average:
32 | 8 0.01
Clear
Actual:
39 | 17 0.00
Average:
32 | 8 0.01
Scattered Clouds
Actual:
37 | 17 0.00
Average:
32 | 7 0.00
Partly Cloudy
Actual:
35 | 19 0.00
Average:
31 | 7 0.01
Scattered Clouds
Actual:
38 | 19 0.00
Average:
31 | 7 0.01
Scattered Clouds
Actual:
42 | 13 0.00
Average:
31 | 7 0.01
Clear
Actual:
32 | 10 0.00
Average:
31 | 7 0.01
Snow
Actual:
28 | 6 0.00
Average:
31 | 7 0.01
Clear
Actual:
32 | 4 0.00
Average:
31 | 7 0.01
Clear
Actual:
32 | 3 0.00
Average:
31 | 7 0.01
Clear
Actual:
32 | 4 0.00
Average:
31 | 7 0.02
Clear
Actual:
42 | 12 0.00
Average:
31 | 7 0.01
Snow
Actual:
31 | 9 0.11
Average:
31 | 7 0.01
Snow
Actual:
12 | -2 0.05
Average:
31 | 7 0.01
Snow
Actual:
17 | 5 0.16
Average:
31 | 7 0.01
Snow
Actual:
27 | 3 0.05
Average:
31 | 7 0.02
Scattered Clouds
Actual:
13 | -5 0.00
Average:
31 | 7 0.01
Fog
Actual:
11 | -9 0.00
Average:
31 | 7 0.01
Clear
Actual:
7 | -11 0.00
Average:
31 | 7 0.02
Scattered Clouds
Actual:
2 | -12 0.00
Average:
31 | 7 0.01
 

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 55 43 30 30 26 22 78 53 28 29.94 29.88 29.75 10 10 10 30 6 33 0.00  
2 60 44 27 34 26 23 78 52 25 29.85 29.66 29.50 10 10 10 29 9 37 0.01 Rain
3 46 37 28 26 12 6 57 39 20 30.23 30.03 29.70 10 10 9 36 17 44 0.00 Snow
4 45 34 23 26 16 11 60 44 28 30.29 30.21 30.06 10 10 10 17 6 18 0.00  
5 56 41 26 31 25 20 81 58 35 30.05 29.91 29.81 10 10 10 25 9 31 0.00  
6 46 35 23 22 17 13 68 50 31 29.99 29.89 29.80 10 10 10 29 7 33 0.00  
7 38 28 18 21 14 6 84 58 32 29.99 29.91 29.79 10 10 10 15 6 20 0.00  
8 30 22 14 16 10 -4 80 52 24 30.15 29.85 29.63 10 7 1 40 14 51 0.02 Snow
9 19 12 5 9 5 -2 80 66 51 30.42 30.24 30.03 10 8 2 21 6 26 0.01 Snow
10 30 19 7 14 8 0 80 60 39 30.10 30.05 29.98 10 10 10 21 8 24 0.00  
11 34 20 5 16 11 2 88 69 49 30.07 29.91 29.65 10 10 10 14 5 17 0.00  
12 47 32 17 21 15 11 80 54 28 29.89 29.75 29.62 10 10 10 26 10 33 0.00  
13 39 28 17 18 14 10 74 57 40 30.01 29.93 29.83 10 10 10 10 4 13 0.00  
14 37 27 17 18 16 12 80 62 44 29.87 29.74 29.63 10 10 10 13 4 14 0.00  
15 35 27 19 22 18 11 84 70 56 29.81 29.75 29.69 10 10 10 13 4 14 0.00  
16 38 29 19 11 6 -1 62 41 20 29.83 29.73 29.60 10 10 10 20 10 23 0.00  
17 42 28 13 21 7 0 59 45 31 29.68 29.61 29.49 10 10 10 21 7 28 0.00  
18 32 21 10 0 -5 -11 53 35 16 29.89 29.80 29.66 10 10 10 24 14 30 0.00  
19 28 17 6 -6 -9 -15 55 38 21 30.28 30.10 29.87 10 10 10 30 15 37 0.00 Snow
20 32 18 4 2 -4 -12 58 43 28 30.39 30.32 30.25 10 10 10 22 6 26 0.00  
21 32 18 3 3 -1 -3 76 53 29 30.36 30.26 30.17 10 10 10 12 5 13 0.00  
22 32 18 4 5 1 -3 69 49 29 30.30 30.11 29.93 10 10 10 15 4 16 0.00  
23 42 27 12 13 7 2 59 39 18 30.08 29.97 29.82 10 10 10 14 6 18 0.00  
24 31 20 9 10 6 2 84 62 39 30.20 29.92 29.81 10 7 1 18 7 23 0.11 Snow
25 12 5 -2 6 2 -5 88 81 73 30.39 30.22 30.07 10 6 2 9 4 10 0.05 Snow
26 17 11 5 12 9 1 88 81 73 30.11 29.74 29.59 10 4 0 8 2 8 0.16 Snow
27 27 15 3 18 12 4 88 74 60 30.09 29.85 29.65 10 5 1 13 5 15 0.05 Snow
28 13 4 -5 7 0 -5 91 79 67 30.34 30.19 29.90 10 10 2 12 3 14 0.00  
29 11 1 -9 3 -7 -11 95 84 73 30.42 30.17 29.94 10 4 0 9 2 10 0.00 Fog
30 7 -2 -11 -2 -8 -15 83 79 75 30.37 30.21 29.93 10 8 2 9 3 10 0.00  
31 2 -5 -12 -2 -10 -17 91 80 69 30.39 30.21 29.96 10 7 0 13 4 13 0.00