Weather History for Boston, MA

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Thursday, February 21, 2013

  Actual Average Record
Temperature  
Mean Temperature 29 °F 33 °F  
Max Temperature 33 °F 40 °F 63 °F (1906)
Min Temperature 25 °F 26 °F -1 °F (1950)
Degree Days  
Heating Degree Days 36 32  
Month to date heating degree days 736 711  
Since 1 July heating degree days 3596 3821  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 11 °F    
Average Humidity 48    
Maximum Humidity 57    
Minimum Humidity 39    
Precipitation  
Precipitation 0.00 in 0.12 in 2.45 in (1898)
Month to date precipitation 3.26 2.37  
Year to date precipitation 4.34 5.73  
Snow  
Snow 0.00 in 0.40 in 8.50 in (1947)
Month to date snowfall 32.0 8.2  
Since 1 July snowfall 40.8 31.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.88 in    
Wind  
Wind Speed 18 mph (WNW)    
Max Wind Speed 26 mph    
Max Gust Speed 37 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Feb. 21, 2013 Rise Set
Actual Time 6:31 AM EST 5:24 PM EST
Civil Twilight 6:03 AM EST 5:52 PM EST
Nautical Twilight 5:30 AM EST 6:25 PM EST
Astronomical Twilight 4:57 AM EST 6:58 PM EST
Moon 1:33 PM EST (2/21) 3:37 AM EST (2/21)
Length of Visible Light 11h 49m
Length of Day
10h 52m
Waxing Gibbous, 83% of the Moon is Illuminated
Feb 21
Waxing Gibbous
Feb 25
Full
Mar 4
Last Quarter
Mar 11
New
Mar 19
First Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 27.0 °F 14.3 °F 12.9 °F 56% 29.78 in 10.0 mi West 17.3 mph - N/A   Clear
1:54 AM 27.0 °F 16.7 °F 12.9 °F 56% 29.79 in 10.0 mi West 11.5 mph - N/A   Partly Cloudy
2:54 AM 28.0 °F 16.1 °F 12.0 °F 51% 29.78 in 10.0 mi West 16.1 mph 24.2 mph N/A   Scattered Clouds
3:54 AM 27.0 °F 15.6 °F 12.0 °F 53% 29.79 in 10.0 mi West 13.8 mph 19.6 mph N/A   Scattered Clouds
4:54 AM 27.0 °F 16.7 °F 12.0 °F 53% 29.80 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
5:54 AM 26.1 °F 13.6 °F 10.9 °F 53% 29.80 in 10.0 mi West 16.1 mph - N/A   Scattered Clouds
6:54 AM 26.1 °F 12.0 °F 10.0 °F 51% 29.81 in 10.0 mi West 20.7 mph 31.1 mph N/A   Scattered Clouds
7:54 AM 26.1 °F 12.3 °F 10.0 °F 51% 29.82 in 10.0 mi West 19.6 mph 28.8 mph N/A   Scattered Clouds
8:54 AM 26.1 °F 11.6 °F 9.0 °F 49% 29.81 in 10.0 mi WNW 21.9 mph 28.8 mph N/A   Scattered Clouds
9:54 AM 28.0 °F 14.3 °F 9.0 °F 45% 29.81 in 10.0 mi WNW 21.9 mph 27.6 mph N/A   Scattered Clouds
10:54 AM 28.9 °F 16.1 °F 8.1 °F 41% 29.81 in 10.0 mi WNW 19.6 mph 29.9 mph N/A   Scattered Clouds
11:54 AM 30.0 °F 17.9 °F 10.0 °F 43% 29.81 in 10.0 mi WNW 18.4 mph 25.3 mph N/A   Scattered Clouds
12:54 PM 30.9 °F 19.8 °F 10.0 °F 42% 29.81 in 10.0 mi NW 16.1 mph 26.5 mph N/A   Scattered Clouds
1:54 PM 32.0 °F 18.9 °F 10.0 °F 40% 29.81 in 10.0 mi NNW 24.2 mph 34.5 mph N/A   Scattered Clouds
2:54 PM 32.0 °F 20.1 °F 12.0 °F 44% 29.83 in 10.0 mi NW 19.6 mph 26.5 mph N/A   Scattered Clouds
3:54 PM 32.0 °F 20.8 °F 12.0 °F 44% 29.86 in 10.0 mi NNW 17.3 mph 26.5 mph N/A   Mostly Cloudy
4:54 PM 30.9 °F 18.1 °F 12.0 °F 46% 29.91 in 10.0 mi NW 21.9 mph 32.2 mph N/A   Mostly Cloudy
5:54 PM 30.0 °F 19.1 °F 12.0 °F 47% 29.95 in 10.0 mi NW 15.0 mph 25.3 mph N/A   Mostly Cloudy
6:54 PM 28.0 °F 14.3 °F 10.9 °F 49% 30.01 in 10.0 mi NNW 21.9 mph 31.1 mph N/A   Mostly Cloudy
7:54 PM 27.0 °F 13.9 °F 12.0 °F 53% 30.04 in 10.0 mi NW 18.4 mph 27.6 mph N/A   Partly Cloudy
8:54 PM 27.0 °F 13.5 °F 12.9 °F 56% 30.08 in 10.0 mi NNW 19.6 mph 25.3 mph N/A   Partly Cloudy
9:54 PM 27.0 °F 14.3 °F 12.9 °F 56% 30.10 in 10.0 mi NW 17.3 mph 23.0 mph N/A   Partly Cloudy
10:54 PM 27.0 °F 15.6 °F 14.0 °F 58% 30.13 in 10.0 mi NW 13.8 mph - N/A   Clear
11:54 PM 27.0 °F 16.1 °F 14.0 °F 58% 30.17 in 10.0 mi NW 12.7 mph - N/A   Clear