Weather History for Boston, MA

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Friday, January 20, 2012

  Actual Average Record
Temperature  
Mean Temperature 27 °F 29 °F  
Max Temperature 32 °F 35 °F 60 °F (1951)
Min Temperature 22 °F 22 °F -3 °F (1946)
Degree Days  
Heating Degree Days 38 36  
Month to date heating degree days 636 716  
Since 1 July heating degree days 2127 2710  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 18 °F    
Average Humidity 66    
Maximum Humidity 92    
Minimum Humidity 39    
Precipitation  
Precipitation 0.05 in 0.10 in 2.05 in (1978)
Month to date precipitation 1.22 2.19  
Year to date precipitation 1.22 2.19  
Sea Level Pressure  
Sea Level Pressure 30.06 in    
Wind  
Wind Speed 11 mph (West)    
Max Wind Speed 21 mph    
Max Gust Speed 29 mph    
Visibility 7 miles    
Events Fog , Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 20, 2012 Rise Set
Actual Time 7:08 AM EST 4:42 PM EST
Civil Twilight 6:37 AM EST 5:12 PM EST
Nautical Twilight 6:03 AM EST 5:47 PM EST
Astronomical Twilight 5:29 AM EST 6:20 PM EST
Moon 4:43 AM EST (1/20) 2:09 PM EST (1/20)
Length of Visible Light 10h 35m
Length of Day
9h 33m
Waning Crescent, 8% of the Moon is Illuminated
Jan 20
Waning Crescent
Jan 23
New
Jan 30
First Quarter
Feb 7
Full
Feb 14
Last Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:00 AM 30.2 °F 19.3 °F 28.4 °F 93% 29.97 in 0.8 mi South 15.0 mph - 0.00 in Snow Light Snow
12:13 AM 30.2 °F 18.9 °F 28.4 °F 93% 29.97 in 0.5 mi SSE 16.1 mph - 0.01 in Fog , Snow Snow
12:32 AM 30.2 °F 20.8 °F 28.4 °F 93% 29.97 in 1.2 mi South 11.5 mph - 0.02 in Snow Light Snow
12:46 AM 30.2 °F 20.8 °F 28.4 °F 93% 29.97 in 1.2 mi South 11.5 mph - 0.02 in Snow Light Snow
12:54 AM 30.9 °F 21.7 °F 28.9 °F 92% 29.96 in 1.0 mi South 11.5 mph - 0.02 in Snow Light Snow
1:22 AM 30.2 °F 23.4 °F 28.4 °F 93% 29.95 in 2.0 mi South 6.9 mph - 0.02 in Snow Light Snow
1:30 AM 30.2 °F 24.3 °F 30.2 °F 100% 29.95 in 2.0 mi South 5.8 mph - 0.02 in Snow Light Snow
1:54 AM 30.9 °F 25.2 °F 28.9 °F 92% 29.94 in 2.0 mi SSW 5.8 mph - 0.03 in Snow Light Snow
2:54 AM 30.9 °F 25.2 °F 28.9 °F 92% 29.93 in 2.0 mi SSW 5.8 mph - 0.00 in   Overcast
3:03 AM 30.2 °F 24.3 °F 28.4 °F 93% 29.93 in 3.0 mi SW 5.8 mph - N/A   Overcast
3:54 AM 30.9 °F 23.5 °F 28.0 °F 89% 29.92 in 10.0 mi SW 8.1 mph - 0.00 in   Overcast
4:38 AM 30.2 °F 23.4 °F 26.6 °F 86% 29.92 in 10.0 mi WSW 6.9 mph - N/A   Scattered Clouds
4:54 AM 30.0 °F 21.1 °F 26.1 °F 85% 29.93 in 10.0 mi SW 10.4 mph - N/A   Scattered Clouds
5:54 AM 30.0 °F 22.4 °F 26.1 °F 85% 29.94 in 10.0 mi West 8.1 mph 16.1 mph N/A   Partly Cloudy
6:54 AM 30.0 °F 21.1 °F 24.1 °F 79% 29.97 in 10.0 mi West 10.4 mph - N/A   Scattered Clouds
7:54 AM 28.9 °F 18.6 °F 21.0 °F 72% 30.02 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds
8:54 AM 28.9 °F 17.3 °F 19.0 °F 67% 30.05 in 10.0 mi WNW 16.1 mph 21.9 mph N/A   Partly Cloudy
9:54 AM 28.9 °F 16.9 °F 17.1 °F 61% 30.07 in 10.0 mi WNW 17.3 mph 25.3 mph N/A   Partly Cloudy
10:54 AM 28.9 °F 17.7 °F 16.0 °F 58% 30.08 in 10.0 mi NW 15.0 mph 23.0 mph N/A   Partly Cloudy
11:54 AM 30.0 °F 19.5 °F 16.0 °F 56% 30.08 in 10.0 mi West 13.8 mph 23.0 mph N/A   Scattered Clouds
12:54 PM 30.0 °F 19.1 °F 12.0 °F 47% 30.08 in 10.0 mi WNW 15.0 mph 23.0 mph N/A   Partly Cloudy
1:54 PM 30.0 °F 20.0 °F 10.9 °F 45% 30.10 in 10.0 mi WNW 12.7 mph - N/A   Partly Cloudy
2:54 PM 30.0 °F 20.5 °F 9.0 °F 41% 30.13 in 10.0 mi WNW 11.5 mph 21.9 mph N/A   Partly Cloudy
3:54 PM 28.9 °F 19.2 °F 8.1 °F 41% 30.15 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
4:54 PM 28.0 °F 19.3 °F 8.1 °F 43% 30.18 in 10.0 mi WNW 9.2 mph - N/A   Scattered Clouds
5:54 PM 28.9 °F 19.2 °F 7.0 °F 40% 30.22 in 10.0 mi WNW 11.5 mph - N/A   Scattered Clouds
6:54 PM 27.0 °F 16.1 °F 6.1 °F 41% 30.24 in 10.0 mi WNW 12.7 mph 20.7 mph N/A   Scattered Clouds
7:54 PM 26.1 °F 16.2 °F 6.1 °F 43% 30.25 in 10.0 mi WNW 10.4 mph - N/A   Clear
8:54 PM 25.0 °F 16.3 °F 7.0 °F 46% 30.28 in 10.0 mi NW 8.1 mph - N/A   Partly Cloudy
9:54 PM 24.1 °F 17.0 °F 5.0 °F 44% 30.27 in 10.0 mi NNW 5.8 mph - N/A   Mostly Cloudy
10:54 PM 24.1 °F 13.1 °F 3.0 °F 40% 30.28 in 10.0 mi NNW 11.5 mph 16.1 mph N/A   Overcast
11:54 PM 23.0 °F 14.7 °F 1.0 °F 39% 30.30 in 10.0 mi North 6.9 mph - N/A   Mostly Cloudy