Weather History for Williamsport, PA

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Saturday, December 31, 2011

  Actual Average Record
Temperature  
Mean Temperature 38 °F 28 °F  
Max Temperature 45 °F 35 °F 62 °F (1972)
Min Temperature 30 °F 20 °F -8 °F (1917)
Degree Days  
Heating Degree Days 27 37  
Month to date heating degree days 878 1047  
Since 1 July heating degree days 1888 2293  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 992 702  
Moisture  
Dew Point 36 °F    
Average Humidity 86    
Maximum Humidity 96    
Minimum Humidity 76    
Precipitation  
Precipitation 0.01 in 0.07 in 1.17 in (1897)
Month to date precipitation 3.68 2.93  
Year to date precipitation 70.26 41.28  
Snow  
Snow 0.00 in - - ()
Month to date snowfall 0.5  
Since 1 July snowfall 1.5  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.93 in    
Wind  
Wind Speed 4 mph (West)    
Max Wind Speed 14 mph    
Max Gust Speed 18 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 31, 2011 Rise Set
Actual Time 7:33 AM EST 4:48 PM EST
Civil Twilight 7:02 AM EST 5:19 PM EST
Nautical Twilight 6:27 AM EST 5:54 PM EST
Astronomical Twilight 5:53 AM EST 6:27 PM EST
Moon 11:12 AM EST (12/31) No Moon Set
Length of Visible Light 10h 17m
Length of Day
9h 14m
Waxing Crescent, 45% of the Moon is Illuminated
Dec 31
Waxing Crescent
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New

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 36.0 °F - 30.9 °F 82% 29.82 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:54 AM 37.0 °F 34.5 °F 33.1 °F 86% 29.84 in 10.0 mi West 3.5 mph - 0.00 in Rain Light Rain
2:54 AM 37.0 °F 34.5 °F 34.0 °F 89% 29.83 in 10.0 mi WSW 3.5 mph - 0.00 in   Overcast
3:54 AM 36.0 °F - 33.1 °F 89% 29.83 in 9.0 mi Calm Calm - N/A   Overcast
4:54 AM 35.1 °F - 33.1 °F 92% 29.83 in 8.0 mi Calm Calm - N/A   Mostly Cloudy
5:54 AM 36.0 °F - 33.1 °F 89% 29.82 in 7.0 mi Calm Calm - N/A   Overcast
6:54 AM 33.8 °F - 32.0 °F 93% 29.81 in 6.0 mi Calm Calm - N/A   Partly Cloudy
7:54 AM 32.0 °F - 30.9 °F 96% 29.86 in 4.0 mi Calm Calm - N/A   Clear
8:54 AM 35.1 °F 30.1 °F 33.1 °F 92% 29.90 in 3.0 mi West 5.8 mph - N/A   Overcast
9:54 AM 37.4 °F - 33.8 °F 87% 29.88 in 6.0 mi Calm Calm - N/A Rain Light Rain
10:54 AM 37.9 °F - 35.1 °F 89% 29.88 in 7.0 mi Calm Calm - 0.00 in   Overcast
11:54 AM 39.0 °F 35.7 °F 35.1 °F 86% 29.88 in 6.0 mi WNW 4.6 mph - 0.00 in Rain Light Rain
12:54 PM 39.9 °F - 36.0 °F 86% 29.87 in 6.0 mi Calm Calm - 0.01 in   Overcast
1:54 PM 43.0 °F - 37.0 °F 80% 29.88 in 9.0 mi Calm Calm - N/A   Overcast
2:54 PM 44.1 °F 40.8 °F 37.9 °F 79% 29.90 in 10.0 mi West 5.8 mph - N/A   Overcast
3:54 PM 45.0 °F 41.8 °F 39.0 °F 80% 29.93 in 10.0 mi West 5.8 mph - N/A   Overcast
4:16 PM 44.6 °F 40.7 °F 37.4 °F 76% 29.93 in 10.0 mi West 6.9 mph - N/A   Overcast
4:54 PM 45.0 °F 40.6 °F 37.9 °F 76% 29.96 in 10.0 mi West 8.1 mph - N/A   Overcast
5:54 PM 45.0 °F 39.7 °F 37.9 °F 76% 29.99 in 10.0 mi West 10.4 mph - N/A   Overcast
6:23 PM 44.6 °F 39.7 °F 37.4 °F 76% 29.98 in 10.0 mi West 9.2 mph - N/A   Overcast
6:51 PM 44.6 °F 39.2 °F 37.4 °F 76% 30.00 in 10.0 mi West 10.4 mph - N/A   Overcast
6:54 PM 45.0 °F 40.6 °F 37.9 °F 76% 30.02 in 10.0 mi West 8.1 mph - N/A   Overcast
7:54 PM 45.0 °F 39.7 °F 37.9 °F 76% 30.04 in 10.0 mi West 10.4 mph - N/A   Overcast
8:54 PM 45.0 °F 40.1 °F 37.9 °F 76% 30.05 in 10.0 mi West 9.2 mph - N/A   Overcast
9:54 PM 44.1 °F 39.5 °F 37.9 °F 79% 30.08 in 10.0 mi West 8.1 mph - N/A   Overcast
10:54 PM 44.6 °F 41.4 °F 37.4 °F 76% 30.08 in 10.0 mi West 5.8 mph - N/A   Overcast
11:54 PM 44.1 °F 41.5 °F 37.0 °F 76% 30.10 in 10.0 mi West 4.6 mph - N/A   Overcast