Weather History for Rapid City, SD

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Wednesday, May 13, 2009

  Actual Average Record
Temperature  
Mean Temperature 7 °C 12 °C  
Max Temperature 13 °C 19 °C 33 °C (1955)
Min Temperature -1 °C 5 °C -3 °C (1943)
Degree Days  
Heating Degree Days 21 11  
Month to date heating degree days 208 170  
Since 1 July heating degree days 7292 6899  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 2  
Moisture  
Dew Point -2 °C    
Average Humidity 55    
Maximum Humidity 85    
Minimum Humidity 24    
Precipitation  
Precipitation T mm 2.79 mm 2.34 mm (1982)
Month to date precipitation 0.16 1.27  
Year to date precipitation 7.02 4.74  
Snow  
Snow 0.00 cm 0.00 cm - ()
Month to date snowfall 0.0 0.9  
Since 1 July snowfall 78.8 40.9  
Snow Depth 0.00 cm    
Sea Level Pressure  
Sea Level Pressure 1011 hPa    
Wind  
Wind Speed 30 km/h (NW)    
Max Wind Speed 69 km/h    
Max Gust Speed 89 km/h    
Visibility 16 kilometers    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 13, 2009 Rise Set
Actual Time 5:27 AM MDT 8:09 PM MDT
Civil Twilight 4:54 AM MDT 8:43 PM MDT
Nautical Twilight 4:12 AM MDT 9:25 PM MDT
Astronomical Twilight 3:24 AM MDT 10:13 PM MDT
Moon No Moon Rise 8:36 AM MDT (5/13)
Length of Visible Light 15h 48m
Length of Day
14h 41m
Waning Gibbous, 81% of the Moon is Illuminated
May 13
Waning Gibbous
May 17
Last Quarter
May 24
New
May 30
First Quarter
Jun 7
Full

Hourly Weather History & Observations

Time (MDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 8.3 °C - 2.2 °C 66% 1001.9 hPa 16.1 km NNW 27.8 km/h / 7.7 m/s - N/A   Clear
1:52 AM 6.7 °C 3.4 °C 1.7 °C 71% 1002.8 hPa 16.1 km WNW 18.5 km/h / 5.1 m/s - N/A   Clear
2:52 AM 7.2 °C 3.8 °C 1.1 °C 65% 1003.4 hPa 16.1 km NW 20.4 km/h / 5.7 m/s - N/A   Clear
3:52 AM 5.6 °C 2.8 °C 1.7 °C 76% 1004.2 hPa 16.1 km NNW 13.0 km/h / 3.6 m/s - N/A   Clear
4:52 AM 4.4 °C 1.7 °C 0.0 °C 73% 1004.9 hPa 16.1 km WNW 11.1 km/h / 3.1 m/s - N/A   Partly Cloudy
5:52 AM 3.9 °C 0.2 °C -1.1 °C 70% 1006.6 hPa 16.1 km WNW 16.7 km/h / 4.6 m/s - N/A   Clear
6:52 AM 7.2 °C 4.5 °C -0.6 °C 58% 1007.0 hPa 16.1 km WNW 14.8 km/h / 4.1 m/s - N/A   Clear
7:52 AM 9.4 °C - -5.6 °C 35% 1007.8 hPa 16.1 km NW 31.5 km/h / 8.7 m/s - N/A   Clear
8:52 AM 10.6 °C - -8.3 °C 26% 1008.1 hPa 16.1 km WNW 42.6 km/h / 11.8 m/s 53.7 km/h / 14.9 m/s N/A   Clear
9:52 AM 10.0 °C - -4.4 °C 36% 1008.8 hPa 16.1 km West 29.6 km/h / 8.2 m/s 51.9 km/h / 14.4 m/s N/A   Clear
10:52 AM 12.2 °C - -8.3 °C 23% 1008.7 hPa 16.1 km West 40.7 km/h / 11.3 m/s 63.0 km/h / 17.5 m/s N/A   Partly Cloudy
11:52 AM 11.1 °C - -6.1 °C 30% 1010.0 hPa 16.1 km WNW 48.2 km/h / 13.4 m/s 63.0 km/h / 17.5 m/s N/A   Scattered Clouds
12:52 PM 10.0 °C - -2.8 °C 41% 1010.5 hPa 16.1 km West 61.1 km/h / 17.0 m/s 75.9 km/h / 21.1 m/s N/A   Partly Cloudy
1:41 PM 6.0 °C -0.0 °C 0.0 °C 66% 1011.4 hPa 16.1 km NNW 51.9 km/h / 14.4 m/s 68.5 km/h / 19.0 m/s N/A   Mostly Cloudy
1:52 PM 6.1 °C 0.4 °C 0.6 °C 68% 1012.6 hPa 16.1 km NNW 46.3 km/h / 12.9 m/s 63.0 km/h / 17.5 m/s N/A   Scattered Clouds
2:52 PM 7.2 °C 3.1 °C 0.6 °C 63% 1013.1 hPa 16.1 km NNW 27.8 km/h / 7.7 m/s 42.6 km/h / 11.8 m/s 0.0 mm   Mostly Cloudy
3:52 PM 11.1 °C - -1.7 °C 41% 1013.0 hPa 16.1 km NW 46.3 km/h / 12.9 m/s 77.8 km/h / 21.6 m/s N/A   Mostly Cloudy
4:52 PM 10.6 °C - -1.7 °C 43% 1013.5 hPa 16.1 km NW 53.7 km/h / 14.9 m/s 70.4 km/h / 19.5 m/s N/A   Clear
5:52 PM 10.6 °C - -1.1 °C 44% 1014.4 hPa 16.1 km NW 63.0 km/h / 17.5 m/s 77.8 km/h / 21.6 m/s N/A   Clear
6:52 PM 10.0 °C - -1.7 °C 44% 1015.2 hPa 16.1 km NW 46.3 km/h / 12.9 m/s 66.7 km/h / 18.5 m/s N/A   Clear
7:52 PM 8.3 °C - -2.2 °C 48% 1016.1 hPa 16.1 km NNW 29.6 km/h / 8.2 m/s - N/A   Clear
8:52 PM 5.6 °C 1.8 °C -2.8 °C 55% 1018.3 hPa 16.1 km NNW 20.4 km/h / 5.7 m/s - N/A   Clear
9:52 PM 3.3 °C -0.9 °C -2.2 °C 68% 1019.4 hPa 16.1 km North 18.5 km/h / 5.1 m/s - N/A   Clear
10:52 PM 2.8 °C -1.2 °C -0.6 °C 79% 1018.9 hPa 16.1 km North 16.7 km/h / 4.6 m/s - N/A   Clear
11:52 PM 0.0 °C -3.1 °C -1.7 °C 88% 1019.1 hPa 16.1 km WNW 9.3 km/h / 2.6 m/s - N/A   Clear