Weather History for Roanoke, VA

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Tuesday, December 20, 2011

  Actual Average Record
Temperature  
Mean Temperature 52 °F 38 °F  
Max Temperature 58 °F 47 °F 71 °F (1987)
Min Temperature 45 °F 29 °F 5 °F (1916)
Degree Days  
Heating Degree Days 13 27  
Month to date heating degree days 428 500  
Since 1 July heating degree days 1141 1304  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1549 1208  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 31 °F    
Average Humidity 51    
Maximum Humidity 71    
Minimum Humidity 30    
Precipitation  
Precipitation 0.00 in 0.09 in 1.31 in (1946)
Month to date precipitation 2.63 1.98  
Year to date precipitation 43.47 40.29  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.0  
Since 1 July snowfall T  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 20 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 20, 2011 Rise Set
Actual Time 7:29 AM EST 5:05 PM EST
Civil Twilight 7:00 AM EST 5:34 PM EST
Nautical Twilight 6:27 AM EST 6:07 PM EST
Astronomical Twilight 5:55 AM EST 6:38 PM EST
Moon 2:52 AM EST (12/20) 1:37 PM EST (12/20)
Length of Visible Light 10h 33m
Length of Day
9h 35m
Waning Crescent, 21% of the Moon is Illuminated
Dec 20
Waning Crescent
Dec 24
New
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 50.0 °F - 21.9 °F 33% 30.14 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
1:54 AM 51.1 °F - 21.0 °F 31% 30.13 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
2:54 AM 50.0 °F - 21.9 °F 33% 30.14 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
3:54 AM 48.0 °F - 21.9 °F 36% 30.14 in 10.0 mi West 11.5 mph - N/A   Clear
4:54 AM 48.2 °F - 23.0 °F 37% 30.15 in 10.0 mi WNW 8.1 mph - N/A   Clear
5:54 AM 48.0 °F - 23.0 °F 37% 30.16 in 10.0 mi WNW 8.1 mph - N/A   Clear
6:54 AM 46.4 °F 43.5 °F 23.0 °F 40% 30.18 in 10.0 mi WNW 5.8 mph - N/A   Clear
7:54 AM 46.0 °F - 24.1 °F 42% 30.18 in 10.0 mi Calm Calm - N/A   Clear
8:54 AM 46.9 °F - 27.0 °F 46% 30.19 in 10.0 mi Calm Calm - N/A   Clear
9:54 AM 48.9 °F - 27.0 °F 43% 30.20 in 10.0 mi Calm Calm - N/A   Clear
10:54 AM 51.1 °F - 32.0 °F 48% 30.20 in 10.0 mi SW 3.5 mph - N/A   Overcast
11:54 AM 53.1 °F - 33.1 °F 47% 30.17 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
12:54 PM 55.9 °F - 33.1 °F 42% 30.15 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:54 PM 57.0 °F - 35.1 °F 44% 30.13 in 10.0 mi Calm Calm - N/A   Overcast
2:54 PM 57.9 °F - 36.0 °F 44% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
3:54 PM 55.4 °F - 37.4 °F 51% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
4:54 PM 55.9 °F - 37.9 °F 51% 30.10 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:54 PM 52.0 °F - 36.0 °F 54% 30.11 in 10.0 mi SE 5.8 mph - N/A   Scattered Clouds
6:54 PM 51.1 °F - 35.1 °F 54% 30.13 in 10.0 mi ESE 3.5 mph - N/A   Partly Cloudy
7:54 PM 51.8 °F - 35.6 °F 54% 30.12 in 10.0 mi ESE 4.6 mph - N/A   Clear
8:54 PM 50.0 °F - 37.0 °F 61% 30.13 in 10.0 mi SSE 3.5 mph - N/A   Scattered Clouds
9:54 PM 46.9 °F - 37.9 °F 71% 30.12 in 10.0 mi NNW 3.5 mph - N/A   Scattered Clouds
10:54 PM 48.0 °F - 39.9 °F 74% 30.12 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:54 PM 48.0 °F - 41.0 °F 77% 30.11 in 10.0 mi Calm Calm - N/A   Overcast