Weather History for Allentown, PA

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Thursday, December 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 35 °F 31 °F  
Max Temperature 44 °F 39 °F 63 °F (1957)
Min Temperature 26 °F 23 °F -2 °F (1951)
Degree Days  
Heating Degree Days 30 34  
Month to date heating degree days 487 624  
Since 1 July heating degree days 1632 1804  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1048 757  
Moisture  
Dew Point 29 °F    
Average Humidity 74    
Maximum Humidity 92    
Minimum Humidity 55    
Precipitation  
Precipitation 0.38 in 0.11 in 2.19 in (1957)
Month to date precipitation 1.86 2.47  
Year to date precipitation 38.57 44.24  
Snow  
Snow 0.00 in 0.20 in 6.20 in (1966)
Month to date snowfall 0.0 2.9  
Since 1 July snowfall 1.4 3.6  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.06 in    
Wind  
Wind Speed 7 mph (ESE)    
Max Wind Speed 23 mph    
Max Gust Speed 30 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 20, 2012 Rise Set
Actual Time 7:21 AM EST 4:37 PM EST
Civil Twilight 6:50 AM EST 5:08 PM EST
Nautical Twilight 6:16 AM EST 5:42 PM EST
Astronomical Twilight 5:43 AM EST 6:16 PM EST
Moon 11:55 AM EST (12/20) 12:04 AM EST (12/20)
Length of Visible Light 10h 17m
Length of Day
9h 15m
First Quarter, 55% 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 (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:51 AM 33.8 °F 29.6 °F 24.8 °F 70% 30.15 in 10.0 mi SW 4.6 mph - N/A   Clear
1:51 AM 37.0 °F 34.5 °F 26.1 °F 65% 30.16 in 10.0 mi WNW 3.5 mph - N/A   Clear
2:51 AM 32.0 °F 26.4 °F 25.0 °F 75% 30.17 in 10.0 mi WSW 5.8 mph - N/A   Clear
3:51 AM 32.0 °F - 25.0 °F 75% 30.18 in 10.0 mi Calm Calm - N/A   Clear
4:51 AM 30.0 °F 25.2 °F 24.1 °F 79% 30.19 in 10.0 mi WSW 4.6 mph - N/A   Clear
5:51 AM 28.0 °F - 24.1 °F 85% 30.20 in 10.0 mi Calm Calm - N/A   Clear
6:51 AM 28.9 °F - 24.1 °F 82% 30.19 in 10.0 mi Calm Calm - N/A   Clear
7:51 AM 28.9 °F - 24.1 °F 82% 30.19 in 10.0 mi Calm Calm - N/A   Clear
8:51 AM 34.0 °F 31.0 °F 28.0 °F 79% 30.21 in 10.0 mi South 3.5 mph - N/A   Clear
9:51 AM 36.0 °F 31.1 °F 27.0 °F 70% 30.20 in 10.0 mi East 5.8 mph - N/A   Clear
10:51 AM 37.0 °F 31.0 °F 26.1 °F 65% 30.18 in 10.0 mi ESE 8.1 mph - N/A   Clear
11:51 AM 37.9 °F 32.1 °F 26.1 °F 62% 30.13 in 10.0 mi East 8.1 mph - N/A   Clear
12:51 PM 41.0 °F 35.2 °F 27.0 °F 57% 30.10 in 10.0 mi East 9.2 mph - N/A   Clear
1:51 PM 41.0 °F 36.4 °F 27.0 °F 57% 30.10 in 10.0 mi ESE 6.9 mph - N/A   Clear
2:51 PM 39.2 °F 31.6 °F 26.6 °F 61% 30.04 in 10.0 mi ESE 12.7 mph - N/A   Clear
3:51 PM 39.9 °F 34.5 °F 27.0 °F 60% 30.06 in 10.0 mi SE 8.1 mph - N/A   Clear
4:51 PM 39.0 °F 32.8 °F 28.0 °F 65% 30.01 in 10.0 mi ESE 9.2 mph - N/A   Clear
5:51 PM 39.9 °F 34.5 °F 28.0 °F 63% 30.02 in 10.0 mi ESE 8.1 mph - N/A   Overcast
6:51 PM 39.0 °F 34.0 °F 32.0 °F 76% 30.00 in 10.0 mi SE 6.9 mph - 0.01 in   Overcast
7:51 PM 39.9 °F 34.5 °F 34.0 °F 79% 29.96 in 10.0 mi East 8.1 mph - N/A   Overcast
8:41 PM 39.2 °F 31.6 °F 35.6 °F 87% 29.88 in 6.0 mi East 12.7 mph - 0.02 in Rain Rain
8:51 PM 39.9 °F 33.4 °F 36.0 °F 86% 29.89 in 7.0 mi East 10.4 mph - 0.03 in Rain Light Rain
9:51 PM 39.9 °F 34.5 °F 37.9 °F 93% 29.86 in 5.0 mi ESE 8.1 mph 19.6 mph 0.11 in Rain Rain
10:51 PM 42.1 °F 33.9 °F 39.0 °F 89% 29.77 in 5.0 mi East 17.3 mph 23.0 mph 0.13 in Rain Rain
10:59 PM 42.8 °F 35.1 °F 39.2 °F 87% 29.75 in 6.0 mi East 16.1 mph - 0.02 in Rain Rain
11:51 PM 44.1 °F 35.7 °F 41.0 °F 89% 29.66 in 7.0 mi East 20.7 mph 28.8 mph 0.09 in Rain Light Rain