Weather History for Philadelphia, PA

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Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 36 °F 34 °F  
Max Temperature 41 °F 41 °F 66 °F (1884)
Min Temperature 30 °F 27 °F 0 °F (1880)
Degree Days  
Heating Degree Days 29 31  
Month to date heating degree days 670 854  
Since 1 July heating degree days 1496 1670  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1603 1301  
Moisture  
Dew Point 21 °F    
Average Humidity 59    
Maximum Humidity 69    
Minimum Humidity 48    
Precipitation  
Precipitation 0.00 in 0.09 in 1.09 in (1911)
Month to date precipitation 4.42 3.56  
Year to date precipitation 35.94 41.53  
Snow  
Snow 0.00 in 0.20 in 3.80 in (1967)
Month to date snowfall 0.2 3.4  
Since 1 July snowfall 0.2 3.7  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 13 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. 31, 2012 Rise Set
Actual Time 7:22 AM EST 4:46 PM EST
Civil Twilight 6:51 AM EST 5:16 PM EST
Nautical Twilight 6:18 AM EST 5:50 PM EST
Astronomical Twilight 5:45 AM EST 6:23 PM EST
Moon 8:14 PM EST (12/31) 9:02 AM EST (12/31)
Length of Visible Light 10h 24m
Length of Day
9h 23m
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 (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 33.1 °F 26.1 °F 21.0 °F 61% 30.26 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
1:54 AM 34.0 °F 24.6 °F 21.0 °F 59% 30.27 in 10.0 mi West 13.8 mph - N/A   Overcast
2:54 AM 32.0 °F 23.0 °F 19.0 °F 59% 30.29 in 10.0 mi WSW 11.5 mph - N/A   Scattered Clouds
3:54 AM 30.0 °F 19.5 °F 19.0 °F 64% 30.27 in 10.0 mi West 13.8 mph - N/A   Scattered Clouds
4:54 AM 30.0 °F 21.7 °F 19.0 °F 64% 30.26 in 10.0 mi West 9.2 mph - N/A   Mostly Cloudy
5:54 AM 30.0 °F 20.0 °F 19.0 °F 64% 30.25 in 10.0 mi West 12.7 mph - N/A   Overcast
6:54 AM 30.0 °F 20.0 °F 19.0 °F 64% 30.24 in 10.0 mi West 12.7 mph - N/A   Overcast
7:54 AM 30.9 °F 22.2 °F 19.0 °F 61% 30.24 in 10.0 mi West 10.4 mph - N/A   Overcast
8:54 AM 30.9 °F 20.7 °F 19.0 °F 61% 30.25 in 10.0 mi West 13.8 mph - N/A   Overcast
9:54 AM 32.0 °F 21.6 °F 19.9 °F 61% 30.25 in 10.0 mi WSW 15.0 mph - N/A   Overcast
10:54 AM 34.0 °F 23.8 °F 19.9 °F 56% 30.23 in 10.0 mi WSW 16.1 mph - N/A   Overcast
11:54 AM 36.0 °F 27.5 °F 21.9 °F 57% 30.19 in 10.0 mi WSW 12.7 mph - N/A   Overcast
12:54 PM 36.0 °F 28.5 °F 21.0 °F 55% 30.15 in 10.0 mi SW 10.4 mph - N/A   Overcast
1:54 PM 37.0 °F 29.3 °F 21.0 °F 52% 30.12 in 10.0 mi SW 11.5 mph - N/A   Overcast
2:54 PM 37.0 °F 29.3 °F 19.9 °F 50% 30.10 in 10.0 mi SW 11.5 mph - N/A   Mostly Cloudy
3:54 PM 37.9 °F 30.5 °F 21.9 °F 53% 30.07 in 10.0 mi SW 11.5 mph - N/A   Overcast
4:54 PM 37.9 °F 30.9 °F 23.0 °F 55% 30.06 in 10.0 mi SW 10.4 mph - N/A   Overcast
5:54 PM 37.9 °F 31.5 °F 24.1 °F 57% 30.04 in 10.0 mi WSW 9.2 mph - N/A   Overcast
6:54 PM 39.0 °F 31.8 °F 25.0 °F 57% 30.03 in 10.0 mi WSW 11.5 mph - N/A   Overcast
7:54 PM 39.0 °F 30.6 °F 24.1 °F 55% 30.00 in 10.0 mi SW 15.0 mph - N/A   Overcast
8:54 PM 39.9 °F 31.1 °F 25.0 °F 55% 29.98 in 10.0 mi SW 17.3 mph - N/A   Overcast
9:54 PM 39.9 °F 32.1 °F 25.0 °F 55% 29.99 in 10.0 mi WSW 13.8 mph - N/A   Overcast
10:54 PM 39.9 °F 31.4 °F 24.1 °F 53% 29.98 in 10.0 mi WSW 16.1 mph - N/A   Overcast
11:54 PM 41.0 °F 34.3 °F 25.0 °F 53% 29.97 in 10.0 mi WSW 11.5 mph - N/A   Overcast