Weather History for Riverton, WY

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Thursday, December 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 18 °F 19 °F  
Max Temperature 32 °F 31 °F 43 °F (2003)
Min Temperature 4 °F 7 °F -21 °F (1998)
Degree Days  
Heating Degree Days 47 46  
Month to date heating degree days 738 894  
Since 1 July heating degree days 2319 2810  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 765 494  
Moisture  
Dew Point -4 °F    
Average Humidity 43    
Maximum Humidity 58    
Minimum Humidity 28    
Precipitation  
Precipitation 0.00 in 0.01 in 0.03 in (2007)
Month to date precipitation 0.04 0.18  
Year to date precipitation 2.91 9.29  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.5  
Since 1 July snowfall 3.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.32 in    
Wind  
Wind Speed 6 mph (South)    
Max Wind Speed 22 mph    
Max Gust Speed 26 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 20, 2012 Rise Set
Actual Time 7:41 AM MST 4:41 PM MST
Civil Twilight 7:09 AM MST 5:14 PM MST
Nautical Twilight 6:33 AM MST 5:50 PM MST
Astronomical Twilight 5:58 AM MST 6:24 PM MST
Moon 12:08 PM MST (12/20) 12:23 AM MST (12/20)
Length of Visible Light 10h 04m
Length of Day
8h 59m
First Quarter, 56% of the Moon is Illuminated
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

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 12.0 °F 2.7 °F -11.9 °F 34% 30.28 in 10.0 mi SW 5.8 mph - N/A   Clear
1:53 AM 12.0 °F 5.9 °F -11.9 °F 34% 30.27 in 10.0 mi SSW 3.5 mph - N/A   Clear
2:53 AM 10.0 °F -4.5 °F -9.0 °F 42% 30.29 in 10.0 mi WSW 11.5 mph - N/A   Clear
3:53 AM 12.0 °F 0.5 °F -9.0 °F 39% 30.30 in 10.0 mi SW 8.1 mph - N/A   Clear
4:53 AM 12.9 °F -1.6 °F -7.1 °F 41% 30.32 in 10.0 mi South 12.7 mph - N/A   Clear
5:53 AM 10.9 °F -1.8 °F -7.1 °F 44% 30.34 in 10.0 mi SSE 9.2 mph - N/A   Clear
6:53 AM 10.9 °F -0.8 °F -6.0 °F 47% 30.35 in 10.0 mi SE 8.1 mph - N/A   Clear
7:53 AM 6.1 °F -0.9 °F -8.0 °F 53% 30.39 in 10.0 mi East 3.5 mph - N/A   Clear
8:53 AM 12.0 °F 4.1 °F -6.0 °F 44% 30.38 in 10.0 mi SW 4.6 mph - N/A   Clear
9:53 AM 19.0 °F - -5.1 °F 34% 30.38 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 23.0 °F 17.0 °F -4.0 °F 31% 30.33 in 10.0 mi South 4.6 mph - N/A   Clear
11:53 AM 25.0 °F 18.1 °F -2.0 °F 31% 30.33 in 10.0 mi SE 5.8 mph - N/A   Clear
12:53 PM 27.0 °F 18.0 °F -0.9 °F 30% 30.30 in 10.0 mi SSE 9.2 mph - N/A   Clear
1:53 PM 28.0 °F 19.3 °F -0.0 °F 30% 30.28 in 10.0 mi SSE 9.2 mph - N/A   Clear
2:53 PM 30.0 °F 24.1 °F 1.9 °F 30% 30.28 in 10.0 mi SSE 5.8 mph - N/A   Clear
3:53 PM 30.9 °F 27.5 °F 1.9 °F 29% 30.25 in 10.0 mi ESE 3.5 mph - N/A   Clear
4:53 PM 28.0 °F 24.2 °F 1.9 °F 33% 30.26 in 10.0 mi ESE 3.5 mph - N/A   Clear
5:53 PM 21.0 °F 13.4 °F -0.0 °F 40% 30.30 in 10.0 mi NNE 5.8 mph - N/A   Clear
6:53 PM 21.9 °F 17.2 °F -0.9 °F 37% 30.30 in 10.0 mi WSW 3.5 mph - N/A   Clear
7:53 PM 12.9 °F 6.9 °F -2.0 °F 51% 30.35 in 10.0 mi NNW 3.5 mph - N/A   Clear
8:53 PM 12.0 °F - -0.9 °F 56% 30.35 in 10.0 mi Calm Calm - N/A   Clear
9:53 PM 14.0 °F 5.1 °F -2.0 °F 49% 30.33 in 10.0 mi WNW 5.8 mph - N/A   Clear
10:53 PM 10.9 °F 2.9 °F -2.0 °F 56% 30.32 in 10.0 mi NW 4.6 mph - N/A   Clear
11:53 PM 10.9 °F -2.6 °F -2.0 °F 56% 30.31 in 10.0 mi WNW 10.4 mph - N/A   Clear