Weather History for Riverton, WY

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Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature -5 °F 19 °F  
Max Temperature 2 °F 31 °F 51 °F (1996)
Min Temperature -12 °F 7 °F -12 °F (2012)
Degree Days  
Heating Degree Days 70 46  
Month to date heating degree days 1341 1400  
Since 1 July heating degree days 2922 3317  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 765 494  
Moisture  
Dew Point -10 °F    
Average Humidity 80    
Maximum Humidity 91    
Minimum Humidity 69    
Precipitation  
Precipitation 0.00 in 0.01 in 0.05 in (2011)
Month to date precipitation 0.41 0.32  
Year to date precipitation 3.28 9.43  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 4.8  
Since 1 July snowfall 7.3  
Snow Depth 3.00 in    
Sea Level Pressure  
Sea Level Pressure 30.21 in    
Wind  
Wind Speed 4 mph (West)    
Max Wind Speed 13 mph    
Max Gust Speed 13 mph    
Visibility 7 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 31, 2012 Rise Set
Actual Time 7:45 AM MST 4:49 PM MST
Civil Twilight 7:13 AM MST 5:21 PM MST
Nautical Twilight 6:37 AM MST 5:57 PM MST
Astronomical Twilight 6:02 AM MST 6:31 PM MST
Moon 8:28 PM MST (12/31) 9:23 AM MST (12/31)
Length of Visible Light 10h 08m
Length of Day
9h 03m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Hourly Weather History & Observations

Time (MST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM -9.9 °F -23.4 °F -15.0 °F 78% 30.33 in 10.0 mi NNW 5.8 mph - N/A   Clear
1:53 AM -4.0 °F - -9.0 °F 79% 30.31 in 10.0 mi Calm Calm - N/A   Clear
2:53 AM -8.0 °F -19.2 °F -13.0 °F 79% 30.32 in 10.0 mi SSW 4.6 mph - N/A   Clear
3:53 AM -8.0 °F -16.9 °F -13.0 °F 79% 30.32 in 8.0 mi South 3.5 mph - N/A   Clear
4:27 AM -9.4 °F - -16.6 °F 71% 29.97 in 3.0 mi Calm Calm - N/A   Haze
4:48 AM -9.4 °F - -13.0 °F 84% 29.96 in 1.8 mi Calm Calm - N/A   Clear
4:53 AM -8.0 °F - -11.0 °F 86% 30.31 in 0.8 mi Calm Calm - N/A   Clear
5:10 AM -9.4 °F -20.9 °F -16.6 °F 71% 29.96 in 2.5 mi WNW 4.6 mph - N/A   Haze
5:17 AM -11.2 °F -24.8 °F -16.6 °F 77% 29.96 in 10.0 mi WNW 5.8 mph - N/A   Clear
5:53 AM -9.0 °F -20.4 °F -14.1 °F 79% 30.33 in 10.0 mi WNW 4.6 mph - N/A   Clear
6:53 AM -8.0 °F -19.2 °F -14.1 °F 75% 30.33 in 10.0 mi SW 4.6 mph - N/A   Clear
7:53 AM -9.0 °F -23.8 °F -14.1 °F 79% 30.35 in 10.0 mi WSW 6.9 mph - N/A   Clear
8:40 AM -5.8 °F - -11.2 °F 77% 29.99 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:48 AM -5.8 °F -14.5 °F -9.4 °F 84% 29.99 in 1.0 mi SW 3.5 mph - N/A   Haze
8:53 AM -4.0 °F - -9.0 °F 79% 30.36 in 0.8 mi Calm Calm - N/A   Haze
8:55 AM -2.2 °F - -9.4 °F 71% 30.00 in 1.2 mi Calm Calm - N/A   Haze
8:58 AM -2.2 °F - -7.6 °F 78% 30.00 in 3.0 mi Calm Calm - N/A   Haze
9:53 AM -5.1 °F - -9.9 °F 80% 30.38 in 10.0 mi Calm Calm - N/A   Clear
10:14 AM -5.8 °F - -9.4 °F 84% 30.01 in 2.0 mi Calm Calm - N/A   Partly Cloudy
10:16 AM -5.8 °F - -9.4 °F 84% 30.01 in 1.0 mi Calm Calm - N/A   Mist
10:23 AM -4.0 °F - -9.4 °F 78% 30.02 in 0.5 mi Calm Calm - N/A   Haze
10:36 AM -2.2 °F - -7.6 °F 78% 30.02 in 1.8 mi Calm Calm - N/A   Overcast
10:42 AM -2.2 °F - -7.6 °F 78% 30.02 in 3.0 mi Calm Calm - N/A   Haze
10:53 AM -2.9 °F - -9.0 °F 75% 30.37 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:53 AM -0.0 °F - -2.0 °F 91% 30.34 in 5.0 mi Calm Calm - N/A   Clear
12:53 PM -0.0 °F -7.9 °F -6.0 °F 76% 30.32 in 9.0 mi East 3.5 mph - N/A   Clear
1:53 PM 1.0 °F -10.3 °F -6.0 °F 72% 30.27 in 10.0 mi ENE 5.8 mph - N/A   Clear
2:53 PM 1.0 °F -8.7 °F -6.0 °F 72% 30.30 in 10.0 mi NE 4.6 mph - N/A   Clear
3:53 PM 1.0 °F - -7.1 °F 69% 30.32 in 10.0 mi Calm Calm - N/A   Clear
4:53 PM -4.0 °F -16.3 °F -9.9 °F 76% 30.35 in 10.0 mi NNW 5.8 mph - N/A   Clear
5:53 PM -2.9 °F -13.3 °F -9.0 °F 75% 30.35 in 10.0 mi SSW 4.6 mph - N/A   Clear
6:53 PM -6.0 °F -21.5 °F -11.0 °F 79% 30.38 in 10.0 mi WNW 8.1 mph - N/A   Clear
7:53 PM -4.0 °F -14.6 °F -9.4 °F 78% 29.99 in 10.0 mi WNW 4.6 mph - N/A   Clear
8:53 PM -0.0 °F -7.9 °F -6.0 °F 76% 30.35 in 10.0 mi WNW 3.5 mph - N/A   Clear
9:53 PM -2.9 °F -18.8 °F -9.0 °F 75% 30.38 in 9.0 mi SW 9.2 mph - N/A   Clear
10:53 PM -2.9 °F -11.2 °F -8.0 °F 79% 30.39 in 10.0 mi SW 3.5 mph - N/A   Overcast
11:53 PM -0.9 °F -8.9 °F -7.1 °F 75% 30.38 in 10.0 mi NW 3.5 mph - N/A   Overcast