Weather History for Boston, MA

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Friday, January 21, 2011

  Actual Average Record
Temperature  
Mean Temperature 26 °F 29 °F  
Max Temperature 30 °F 35 °F 68 °F (1906)
Min Temperature 22 °F 22 °F 0 °F (1888)
Degree Days  
Heating Degree Days 39 36  
Month to date heating degree days 733 752  
Since 1 July heating degree days 2655 2746  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 21 °F    
Average Humidity 74    
Maximum Humidity 92    
Minimum Humidity 55    
Precipitation  
Precipitation 0.23 in 0.11 in 2.52 in (1979)
Month to date precipitation 3.23 2.30  
Year to date precipitation 3.23 2.30  
Sea Level Pressure  
Sea Level Pressure 29.54 in    
Wind  
Wind Speed 14 mph (NNW)    
Max Wind Speed 28 mph    
Max Gust Speed 37 mph    
Visibility 4 miles    
Events Fog , Snow    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 21, 2011 Rise Set
Actual Time 7:07 AM EST 4:43 PM EST
Civil Twilight 6:36 AM EST 5:14 PM EST
Nautical Twilight 6:02 AM EST 5:48 PM EST
Astronomical Twilight 5:29 AM EST 6:22 PM EST
Moon 7:20 PM EST (1/21) 7:56 AM EST (1/21)
Length of Visible Light 10h 37m
Length of Day
9h 36m
Waning Gibbous, 95% of the Moon is Illuminated
Jan 21
Waning Gibbous
Jan 26
Last Quarter
Feb 2
New
Feb 11
First Quarter
Feb 18
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 27.0 °F - 17.1 °F 66% 29.83 in 10.0 mi Calm Calm - N/A   Overcast
1:39 AM 26.6 °F - 17.6 °F 69% 29.82 in 6.0 mi Calm Calm - 0.00 in Snow Light Snow
1:54 AM 26.1 °F 21.9 °F 19.0 °F 75% 29.82 in 4.0 mi North 3.5 mph - 0.00 in Snow Light Snow
2:10 AM 24.8 °F 20.5 °F 19.4 °F 80% 29.82 in 7.0 mi North 3.5 mph - 0.00 in Snow Light Snow
2:19 AM 24.8 °F 17.9 °F 21.2 °F 86% 29.81 in 1.8 mi North 5.8 mph - 0.00 in Snow Light Snow
2:32 AM 24.8 °F 16.9 °F 21.2 °F 86% 29.79 in 1.5 mi North 6.9 mph - 0.01 in Snow Light Snow
2:54 AM 24.1 °F 15.2 °F 21.9 °F 91% 29.75 in 1.5 mi NNE 8.1 mph - 0.01 in Snow Light Snow
3:01 AM 24.8 °F 16.1 °F 21.2 °F 86% 29.75 in 2.0 mi NNE 8.1 mph - 0.00 in Snow Light Snow
3:13 AM 24.8 °F 17.9 °F 21.2 °F 86% 29.74 in 3.0 mi North 5.8 mph - 0.00 in Snow Light Snow
3:54 AM 25.0 °F 19.3 °F 21.9 °F 88% 29.70 in 8.0 mi NNE 4.6 mph - 0.00 in   Overcast
4:19 AM 24.8 °F 19.1 °F 21.2 °F 86% 29.69 in 1.8 mi North 4.6 mph - 0.00 in Snow Light Snow
4:33 AM 24.8 °F 20.5 °F 23.0 °F 93% 29.68 in 0.8 mi NNE 3.5 mph - 0.01 in Snow Light Snow
4:43 AM 26.6 °F 20.0 °F 24.8 °F 93% 29.66 in 1.0 mi NNE 5.8 mph - 0.02 in Snow Light Snow
4:54 AM 26.1 °F 19.4 °F 24.1 °F 92% 29.65 in 1.2 mi NNE 5.8 mph - 0.03 in Snow Light Snow
5:54 AM 25.0 °F 14.8 °F 21.9 °F 88% 29.60 in 1.5 mi North 10.4 mph - 0.03 in Snow Light Snow
6:36 AM 24.8 °F 15.3 °F 23.0 °F 93% 29.54 in 0.8 mi North 9.2 mph - 0.03 in Snow Light Snow
6:54 AM 26.1 °F 15.6 °F 24.1 °F 92% 29.52 in 0.5 mi NNE 11.5 mph - 0.05 in Fog , Snow Snow
7:01 AM 26.6 °F 16.2 °F 24.8 °F 93% 29.52 in 0.5 mi NNE 11.5 mph - 0.01 in Fog , Snow Snow
7:54 AM 27.0 °F 16.1 °F 25.0 °F 92% 29.47 in 0.2 mi North 12.7 mph - 0.04 in Fog , Snow Heavy Snow
8:43 AM 26.6 °F 15.7 °F 24.8 °F 93% 29.45 in 0.2 mi North 12.7 mph - 0.03 in Fog , Snow Heavy Snow
8:54 AM 27.0 °F 15.2 °F 24.1 °F 89% 29.44 in 0.2 mi North 15.0 mph - 0.04 in Fog , Snow Heavy Snow
9:28 AM 26.6 °F 15.7 °F 24.8 °F 93% 29.42 in 0.2 mi NNW 12.7 mph - 0.02 in Fog , Snow Snow
9:50 AM 26.6 °F 16.2 °F 24.8 °F 93% 29.41 in 0.8 mi NNW 11.5 mph - 0.02 in Snow Light Snow
9:54 AM 27.0 °F 14.7 °F 25.0 °F 92% 29.41 in 1.0 mi NNW 16.1 mph - 0.02 in Snow Light Snow
10:14 AM 26.6 °F 14.7 °F 24.8 °F 93% 29.39 in 0.5 mi NNW 15.0 mph - 0.01 in Fog , Snow Snow
10:26 AM 28.4 °F 18.0 °F 24.8 °F 86% 29.38 in 0.8 mi NW 12.7 mph - 0.01 in Snow Light Snow
10:36 AM 28.4 °F 17.5 °F 24.8 °F 86% 29.38 in 1.0 mi NNW 13.8 mph - 0.01 in Snow Light Snow
10:46 AM 28.4 °F 17.5 °F 24.8 °F 86% 29.37 in 1.0 mi NW 13.8 mph 19.6 mph 0.01 in Snow Light Snow
10:54 AM 28.0 °F 17.0 °F 25.0 °F 88% 29.37 in 1.0 mi NW 13.8 mph - 0.01 in Snow Light Snow
11:14 AM 26.6 °F 14.7 °F 23.0 °F 86% 29.37 in 1.0 mi WNW 15.0 mph - 0.00 in Snow Light Snow
11:21 AM 26.6 °F 14.7 °F 23.0 °F 86% 29.36 in 1.0 mi NW 15.0 mph - 0.00 in Snow Light Snow
11:29 AM 26.6 °F 15.2 °F 23.0 °F 86% 29.36 in 0.8 mi NW 13.8 mph - 0.00 in Snow Light Snow
11:38 AM 26.6 °F 14.3 °F 23.0 °F 86% 29.36 in 1.0 mi NW 16.1 mph - 0.00 in Snow Light Snow
11:54 AM 28.0 °F 16.1 °F 23.0 °F 81% 29.35 in 3.0 mi WNW 16.1 mph 21.9 mph 0.00 in Snow Light Snow
12:01 PM 28.4 °F 17.0 °F 23.0 °F 80% 29.36 in 3.0 mi NW 15.0 mph - 0.00 in Snow Light Snow
12:09 PM 28.4 °F 17.5 °F 23.0 °F 80% 29.36 in 2.5 mi WNW 13.8 mph 25.3 mph 0.00 in Snow Light Snow
12:31 PM 28.4 °F 16.2 °F 21.2 °F 74% 29.36 in 3.0 mi WNW 17.3 mph 29.9 mph 0.00 in Snow Light Snow
12:52 PM 28.4 °F 15.4 °F 21.2 °F 74% 29.36 in 3.0 mi WNW 19.6 mph 25.3 mph 0.00 in Snow Light Snow
12:54 PM 28.0 °F 14.6 °F 21.9 °F 78% 29.36 in 3.0 mi WNW 20.7 mph 26.5 mph 0.00 in Snow Light Snow
1:54 PM 30.0 °F 16.9 °F 19.9 °F 66% 29.39 in 9.0 mi WNW 21.9 mph 29.9 mph 0.00 in   Overcast
2:54 PM 30.0 °F 17.5 °F 17.1 °F 59% 29.42 in 6.0 mi WNW 19.6 mph 28.8 mph 0.00 in Snow Blowing Snow
3:54 PM 28.9 °F 15.1 °F 15.1 °F 56% 29.46 in 7.0 mi WNW 23.0 mph 31.1 mph N/A   Mostly Cloudy
4:54 PM 27.0 °F 13.5 °F 12.0 °F 53% 29.50 in 9.0 mi WNW 19.6 mph 27.6 mph N/A   Partly Cloudy
5:54 PM 26.1 °F 16.2 °F 12.9 °F 58% 29.55 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy
6:54 PM 26.1 °F 12.7 °F 14.0 °F 60% 29.58 in 10.0 mi West 18.4 mph 25.3 mph N/A   Partly Cloudy
7:54 PM 26.1 °F 11.3 °F 15.1 °F 63% 29.62 in 10.0 mi West 23.0 mph 29.9 mph 0.00 in   Scattered Clouds
8:54 PM 24.1 °F 10.1 °F 12.0 °F 60% 29.65 in 10.0 mi West 18.4 mph 25.3 mph N/A   Partly Cloudy
9:54 PM 23.0 °F 9.2 °F 10.9 °F 60% 29.68 in 10.0 mi West 17.3 mph 26.5 mph N/A   Partly Cloudy
10:54 PM 23.0 °F 10.1 °F 10.9 °F 60% 29.70 in 10.0 mi West 15.0 mph 27.6 mph N/A   Partly Cloudy
11:54 PM 21.9 °F 9.2 °F 10.9 °F 63% 29.72 in 10.0 mi West 13.8 mph 24.2 mph N/A   Partly Cloudy