Weather History for Allentown, PA

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Friday, December 21, 2012

  Actual Average Record
Temperature  
Mean Temperature 45 °F 31 °F  
Max Temperature 56 °F 39 °F 57 °F (1957)
Min Temperature 34 °F 23 °F -3 °F (1942)
Degree Days  
Heating Degree Days 20 34  
Month to date heating degree days 507 658  
Since 1 July heating degree days 1652 1838  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 1048 757  
Moisture  
Dew Point 40 °F    
Average Humidity 76    
Maximum Humidity 93    
Minimum Humidity 59    
Precipitation  
Precipitation 1.44 in 0.10 in 1.44 in (2012)
Month to date precipitation 3.30 2.57  
Year to date precipitation 40.01 44.34  
Snow  
Snow T in 0.10 in 4.10 in (1959)
Month to date snowfall T 3.0  
Since 1 July snowfall 1.4 3.7  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.28 in    
Wind  
Wind Speed 15 mph (SW)    
Max Wind Speed 25 mph    
Max Gust Speed 35 mph    
Visibility 6 miles    
Events Rain , Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 21, 2012 Rise Set
Actual Time 7:22 AM EST 4:38 PM EST
Civil Twilight 6:51 AM EST 5:08 PM EST
Nautical Twilight 6:16 AM EST 5:43 PM EST
Astronomical Twilight 5:43 AM EST 6:16 PM EST
Moon 12:25 PM EST (12/21) 1:05 AM EST (12/21)
Length of Visible Light 10h 17m
Length of Day
9h 15m
Waxing Gibbous, 64% of the Moon is Illuminated
Dec 21
Waxing Gibbous
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 45.0 °F 36.2 °F 42.1 °F 90% 29.58 in 4.0 mi ESE 24.2 mph 34.5 mph 0.11 in Rain Rain
1:13 AM 44.6 °F 36.9 °F 42.8 °F 93% 29.54 in 5.0 mi East 18.4 mph 31.1 mph 0.07 in Rain Rain
1:23 AM 46.4 °F 39.2 °F 42.8 °F 87% 29.53 in 5.0 mi ESE 18.4 mph 26.5 mph 0.08 in Rain Light Rain
1:30 AM 46.4 °F 38.7 °F 42.8 °F 87% 29.51 in 8.0 mi East 20.7 mph 27.6 mph 0.09 in Rain Light Rain
1:51 AM 46.9 °F - 44.1 °F 90% 29.49 in 6.0 mi ESE 18.4 mph 29.9 mph 0.11 in Rain Rain
2:51 AM 48.9 °F - 46.9 °F 93% 29.39 in 4.0 mi ESE 21.9 mph 34.5 mph 0.12 in Rain Rain
3:45 AM 51.8 °F - 48.2 °F 88% 29.27 in 3.0 mi ESE 21.9 mph 33.4 mph 0.14 in Rain Heavy Rain
3:51 AM 51.1 °F - 48.9 °F 92% 29.27 in 3.0 mi ESE 21.9 mph 33.4 mph 0.17 in Rain Rain
4:15 AM 51.8 °F - 50.0 °F 94% 29.24 in 4.0 mi SE 17.3 mph 32.2 mph 0.07 in Rain Heavy Rain
4:36 AM 53.6 °F - 50.0 °F 88% 29.22 in 3.0 mi ESE 16.1 mph 28.8 mph 0.18 in Rain Heavy Rain
4:44 AM 53.6 °F - 51.8 °F 94% 29.20 in 3.0 mi ESE 17.3 mph 25.3 mph 0.20 in Rain Rain
4:51 AM 53.1 °F - 51.1 °F 93% 29.19 in 3.0 mi ESE 15.0 mph 24.2 mph 0.22 in Rain Rain
5:15 AM 53.6 °F - 51.8 °F 94% 29.16 in 2.5 mi SE 13.8 mph 23.0 mph 0.10 in Rain Heavy Rain
5:24 AM 53.6 °F - 51.8 °F 94% 29.16 in 3.0 mi SE 19.6 mph 25.3 mph 0.14 in Rain Heavy Rain
5:31 AM 55.4 °F - 51.8 °F 88% 29.15 in 2.5 mi SSE 17.3 mph 25.3 mph 0.18 in Rain Rain
5:40 AM 55.4 °F - 53.6 °F 94% 29.15 in 4.0 mi SSE 18.4 mph 26.5 mph 0.20 in Rain Rain
5:51 AM 55.9 °F - 53.1 °F 90% 29.17 in 3.0 mi South 18.4 mph 29.9 mph 0.23 in Rain Rain
5:58 AM 55.4 °F - 53.6 °F 94% 29.17 in 1.8 mi SSW 12.7 mph 25.3 mph 0.10 in Rain Heavy Rain
6:00 AM 55.4 °F - 53.6 °F 94% 29.17 in 2.0 mi SW 13.8 mph 20.7 mph 0.11 in Rain Rain
6:04 AM 55.4 °F - 53.6 °F 94% 29.16 in 1.8 mi SW 12.7 mph 20.7 mph 0.13 in Rain Heavy Rain
6:15 AM 53.6 °F - 51.8 °F 94% 29.16 in 2.0 mi SSW 6.9 mph 17.3 mph 0.23 in Rain Heavy Rain
6:39 AM 48.2 °F - 46.4 °F 93% 29.16 in 2.0 mi WNW 15.0 mph 29.9 mph 0.38 in Rain Heavy Rain
6:51 AM 46.4 °F 39.5 °F 44.6 °F 93% 29.19 in 2.0 mi West 17.3 mph 25.3 mph N/A Rain Light Rain
7:21 AM 44.6 °F 39.2 °F 42.8 °F 93% 29.22 in 2.0 mi West 10.4 mph - 0.08 in Rain Rain
7:38 AM 42.8 °F 35.4 °F 37.4 °F 81% 29.20 in 2.0 mi WNW 15.0 mph 23.0 mph 0.09 in Rain Light Rain
7:47 AM 42.8 °F 36.2 °F 37.4 °F 81% 29.19 in 10.0 mi WNW 12.7 mph 21.9 mph 0.09 in Rain Light Rain
7:51 AM 41.0 °F 34.3 °F 37.0 °F 86% 29.20 in 10.0 mi WNW 11.5 mph 19.6 mph 0.09 in Rain Light Rain
8:51 AM 41.0 °F 33.1 °F 34.0 °F 76% 29.24 in 10.0 mi West 15.0 mph 21.9 mph 0.00 in   Mostly Cloudy
8:59 AM 41.0 °F 32.8 °F 33.8 °F 76% 29.23 in 10.0 mi West 16.1 mph 20.7 mph N/A   Mostly Cloudy
9:51 AM 42.1 °F 36.1 °F 33.1 °F 70% 29.25 in 10.0 mi West 10.4 mph 23.0 mph N/A   Overcast
10:08 AM 41.0 °F 32.5 °F 33.8 °F 76% 29.25 in 10.0 mi West 17.3 mph 25.3 mph N/A   Overcast
10:46 AM 41.0 °F 33.9 °F 30.2 °F 65% 29.25 in 10.0 mi West 12.7 mph 25.3 mph N/A   Overcast
10:51 AM 39.9 °F 31.8 °F 30.9 °F 70% 29.26 in 10.0 mi West 15.0 mph - N/A   Overcast
11:51 AM 39.9 °F 33.4 °F 28.9 °F 65% 29.26 in 10.0 mi West 10.4 mph 26.5 mph N/A   Overcast
12:51 PM 39.0 °F 31.0 °F 27.0 °F 62% 29.27 in 10.0 mi West 13.8 mph 28.8 mph N/A   Overcast
1:51 PM 37.9 °F 28.2 °F 27.0 °F 65% 29.27 in 10.0 mi West 18.4 mph 26.5 mph N/A   Overcast
2:51 PM 37.9 °F 30.5 °F 28.0 °F 68% 29.29 in 10.0 mi West 11.5 mph - N/A   Overcast
3:51 PM 37.9 °F 30.5 °F 27.0 °F 65% 29.30 in 10.0 mi West 11.5 mph - N/A   Overcast
4:51 PM 37.4 °F 29.8 °F 26.6 °F 65% 29.30 in 10.0 mi West 11.5 mph - N/A   Overcast
5:51 PM 37.0 °F 28.9 °F 27.0 °F 67% 29.32 in 10.0 mi WSW 12.7 mph 23.0 mph N/A   Overcast
6:51 PM 36.0 °F 28.0 °F 28.0 °F 73% 29.34 in 10.0 mi WSW 11.5 mph 20.7 mph N/A   Overcast
7:51 PM 37.0 °F 26.2 °F 27.0 °F 67% 29.34 in 10.0 mi WSW 21.9 mph 29.9 mph N/A   Overcast
8:51 PM 35.6 °F 27.5 °F 30.2 °F 81% 29.35 in 8.0 mi SW 11.5 mph - N/A Snow Light Snow
9:51 PM 35.1 °F 27.9 °F 30.0 °F 82% 29.36 in 10.0 mi WSW 9.2 mph - 0.00 in   Overcast
10:51 PM 36.0 °F 27.5 °F 28.0 °F 73% 29.37 in 10.0 mi WSW 12.7 mph - N/A   Overcast
11:51 PM 34.0 °F 23.4 °F 30.9 °F 89% 29.37 in 5.0 mi WSW 17.3 mph - 0.00 in Snow Light Snow