Weather History for Boston, MA

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Wednesday, December 19, 2012

  Actual Average Record
Temperature  
Mean Temperature 42 °F 34 °F  
Max Temperature 45 °F 40 °F 64 °F (1899)
Min Temperature 38 °F 27 °F -10 °F (1875)
Degree Days  
Heating Degree Days 23 31  
Month to date heating degree days 446 538  
Since 1 July heating degree days 1459 1593  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 905 747  
Moisture  
Dew Point 32 °F    
Average Humidity 71    
Maximum Humidity 89    
Minimum Humidity 53    
Precipitation  
Precipitation T in 0.12 in 1.35 in (1986)
Month to date precipitation 2.64 2.41  
Year to date precipitation 33.44 42.40  
Snow  
Snow 0.00 in 0.30 in 10.00 in (1945)
Month to date snowfall 0.5 4.7  
Since 1 July snowfall 0.9 6.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.66 in    
Wind  
Wind Speed 16 mph (NW)    
Max Wind Speed 25 mph    
Max Gust Speed 37 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 19, 2012 Rise Set
Actual Time 7:09 AM EST 4:13 PM EST
Civil Twilight 6:37 AM EST 4:45 PM EST
Nautical Twilight 6:01 AM EST 5:21 PM EST
Astronomical Twilight 5:27 AM EST 5:55 PM EST
Moon 11:08 AM EST (12/19) 11:46 PM EST (12/19)
Length of Visible Light 10h 08m
Length of Day
9h 04m
Waxing Crescent, 45% of the Moon is Illuminated
Dec 19
Waxing Crescent
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
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 41.0 °F 33.9 °F 37.9 °F 89% 29.44 in 10.0 mi West 12.7 mph - N/A   Overcast
1:19 AM 41.0 °F 33.5 °F 37.4 °F 87% 29.45 in 10.0 mi WNW 13.8 mph 21.9 mph N/A   Overcast
1:27 AM 41.0 °F 33.9 °F 37.4 °F 87% 29.45 in 9.0 mi WNW 12.7 mph - N/A   Overcast
1:54 AM 42.1 °F 35.2 °F 37.9 °F 85% 29.45 in 10.0 mi West 12.7 mph - N/A   Overcast
2:01 AM 42.8 °F 36.2 °F 37.4 °F 81% 29.45 in 10.0 mi West 12.7 mph - N/A   Overcast
2:54 AM 42.1 °F 34.5 °F 37.0 °F 82% 29.45 in 10.0 mi West 15.0 mph 21.9 mph N/A   Overcast
3:54 AM 41.0 °F 33.5 °F 35.1 °F 79% 29.46 in 10.0 mi WNW 13.8 mph 23.0 mph N/A   Overcast
4:54 AM 41.0 °F 32.8 °F 34.0 °F 76% 29.47 in 10.0 mi WNW 16.1 mph - N/A   Mostly Cloudy
5:54 AM 41.0 °F 33.1 °F 33.1 °F 73% 29.49 in 10.0 mi WNW 15.0 mph 23.0 mph N/A   Overcast
6:54 AM 39.9 °F 31.8 °F 33.1 °F 77% 29.52 in 10.0 mi WNW 15.0 mph 20.7 mph 0.00 in Rain Light Rain
7:54 AM 39.9 °F 31.8 °F 33.1 °F 77% 29.53 in 10.0 mi WNW 15.0 mph 24.2 mph 0.00 in Rain Light Rain
8:54 AM 41.0 °F 31.1 °F 32.0 °F 70% 29.55 in 10.0 mi NW 23.0 mph 34.5 mph 0.00 in   Overcast
9:54 AM 43.0 °F 34.0 °F 32.0 °F 65% 29.57 in 10.0 mi NW 21.9 mph 32.2 mph 0.00 in   Mostly Cloudy
10:54 AM 43.0 °F 34.8 °F 30.9 °F 62% 29.58 in 10.0 mi NW 18.4 mph 29.9 mph N/A   Mostly Cloudy
11:54 AM 44.1 °F 36.8 °F 30.9 °F 60% 29.61 in 10.0 mi NW 16.1 mph 26.5 mph N/A   Mostly Cloudy
12:54 PM 44.1 °F 37.1 °F 30.0 °F 58% 29.64 in 10.0 mi NW 15.0 mph 25.3 mph N/A   Overcast
1:54 PM 44.1 °F 36.5 °F 30.0 °F 58% 29.67 in 10.0 mi NW 17.3 mph 31.1 mph N/A   Mostly Cloudy
2:54 PM 44.1 °F 34.8 °F 28.9 °F 55% 29.72 in 10.0 mi NW 25.3 mph 33.4 mph N/A   Mostly Cloudy
3:54 PM 43.0 °F 34.5 °F 28.9 °F 58% 29.76 in 10.0 mi NNW 19.6 mph 26.5 mph N/A   Mostly Cloudy
4:54 PM 42.1 °F 34.2 °F 28.9 °F 60% 29.80 in 10.0 mi NW 16.1 mph 25.3 mph N/A   Mostly Cloudy
5:54 PM 41.0 °F 32.5 °F 28.9 °F 62% 29.84 in 10.0 mi NNW 17.3 mph 27.6 mph N/A   Scattered Clouds
6:54 PM 41.0 °F 33.5 °F 28.9 °F 62% 29.89 in 10.0 mi NNW 13.8 mph 23.0 mph N/A   Mostly Cloudy
7:54 PM 39.9 °F 33.4 °F 28.9 °F 65% 29.94 in 10.0 mi NNW 10.4 mph - N/A   Mostly Cloudy
8:54 PM 39.0 °F 31.8 °F 28.9 °F 67% 29.96 in 10.0 mi NNW 11.5 mph 20.7 mph N/A   Mostly Cloudy
9:54 PM 39.0 °F 31.8 °F 28.9 °F 67% 29.99 in 10.0 mi NNW 11.5 mph 18.4 mph N/A   Mostly Cloudy
10:54 PM 37.9 °F 31.5 °F 28.0 °F 68% 30.02 in 10.0 mi NNW 9.2 mph - N/A   Mostly Cloudy
11:54 PM 37.9 °F 30.9 °F 28.0 °F 68% 30.03 in 10.0 mi NW 10.4 mph - N/A   Mostly Cloudy