Boston, MA

5:48 AM EDT on April 21, 2018 (GMT -0400)
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Weather History for KBOS - September, 2011

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Wednesday, September 14, 2011

  Actual Average Record
Temperature  
Mean Temperature 77 °F 66 °F  
Max Temperature 86 °F 73 °F 92 °F (1931)
Min Temperature 68 °F 58 °F 40 °F (1884)
Degree Days  
Heating Degree Days 0 2  
Month to date heating degree days 10 18  
Since 1 July heating degree days 10 31  
Cooling Degree Days 12 3  
Month to date cooling degree days 71 55  
Year to date cooling degree days 935 714  
Growing Degree Days 27 (Base 50)    
Moisture  
Dew Point 66 °F    
Average Humidity 69    
Maximum Humidity 90    
Minimum Humidity 48    
Precipitation  
Precipitation 0.08 in 0.12 in 2.46 in (1944)
Month to date precipitation 2.23 1.49  
Year to date precipitation 35.28 30.11  
Snow  
Snow 0.00 in 0.00 in 0.00 in (2002)
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Since 1 September snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.89 in    
Wind  
Wind Speed 9 mph (SW)    
Max Wind Speed 24 mph    
Max Gust Speed 29 mph    
Visibility 9 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

Sep. 14, 2011 Rise Set
Actual Time 6:22 AM EDT 6:55 PM EDT
Civil Twilight 5:54 AM EDT 7:24 PM EDT
Nautical Twilight 5:20 AM EDT 7:57 PM EDT
Astronomical Twilight 4:46 AM EDT 8:31 PM EDT
Moon 7:34 PM EDT (9/14) 8:34 AM EDT (9/14)
Length of Visible Light 13h 29m
Length of Day
12h 33m
Waning Gibbous, 95% of the Moon is Illuminated
Sep 14
Waning Gibbous
Sep 20
Last Quarter
Sep 27
New
Oct 3
First Quarter
Oct 11
Full

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 71.1 °F - 63.0 °F 75% 29.86 in 10.0 mi SW 11.5 mph - N/A   Clear
1:54 AM 70.0 °F - 64.0 °F 81% 29.86 in 10.0 mi SW 9.2 mph - N/A   Clear
2:54 AM 70.0 °F - 64.0 °F 81% 29.86 in 10.0 mi SSW 9.2 mph - N/A   Clear
3:54 AM 68.0 °F - 64.0 °F 87% 29.86 in 8.0 mi SSW 9.2 mph - N/A   Clear
4:54 AM 69.1 °F - 64.9 °F 87% 29.86 in 8.0 mi SSW 9.2 mph - N/A   Clear
5:54 AM 70.0 °F - 64.9 °F 84% 29.86 in 8.0 mi SW 9.2 mph - N/A   Clear
6:54 AM 70.0 °F - 64.9 °F 84% 29.89 in 7.0 mi SW 9.2 mph - N/A   Clear
7:54 AM 72.0 °F - 64.9 °F 78% 29.90 in 7.0 mi SW 10.4 mph - N/A   Clear
8:54 AM 75.0 °F - 64.9 °F 71% 29.90 in 9.0 mi WSW 11.5 mph 19.6 mph N/A   Clear
9:54 AM 78.1 °F - 64.9 °F 64% 29.91 in 10.0 mi West 8.1 mph - N/A   Clear
10:54 AM 80.1 °F 82.1 °F 66.0 °F 62% 29.91 in 10.0 mi SW 9.2 mph - N/A   Clear
11:54 AM 82.0 °F 84.1 °F 66.0 °F 58% 29.90 in 10.0 mi SSW 8.1 mph 16.1 mph N/A   Partly Cloudy
12:54 PM 82.9 °F 84.6 °F 64.9 °F 54% 29.89 in 10.0 mi SSW 8.1 mph - N/A   Partly Cloudy
1:54 PM 82.9 °F 84.6 °F 64.9 °F 54% 29.89 in 10.0 mi SSW 10.4 mph 16.1 mph N/A   Mostly Cloudy
2:54 PM 84.9 °F 86.6 °F 64.9 °F 51% 29.88 in 10.0 mi SW 12.7 mph - N/A   Partly Cloudy
3:54 PM 86.0 °F 87.6 °F 64.9 °F 49% 29.88 in 10.0 mi WSW 13.8 mph - N/A   Partly Cloudy
4:54 PM 84.2 °F 85.6 °F 64.4 °F 51% 29.88 in 10.0 mi WSW 13.8 mph - N/A   Partly Cloudy
5:24 PM 78.8 °F - 69.8 °F 74% 29.89 in 2.0 mi WSW 8.1 mph 28.8 mph 0.04 in Rain , Thunderstorm Thunderstorms and Rain
5:37 PM 78.8 °F - 69.8 °F 74% 29.89 in 7.0 mi SW 8.1 mph - 0.07 in   Mostly Cloudy
5:54 PM 78.1 °F - 69.1 °F 74% 29.89 in 7.0 mi SW 6.9 mph - 0.07 in   Mostly Cloudy
6:54 PM 77.0 °F - 70.0 °F 79% 29.90 in 5.0 mi SSW 6.9 mph - 0.01 in Rain Light Rain
7:54 PM 73.9 °F - 66.9 °F 79% 29.91 in 10.0 mi South 8.1 mph - 0.00 in   Scattered Clouds
8:54 PM 73.0 °F - 66.9 °F 81% 29.92 in 10.0 mi SSW 10.4 mph - N/A   Partly Cloudy
9:54 PM 72.0 °F - 66.0 °F 81% 29.93 in 9.0 mi SSW 8.1 mph - N/A   Partly Cloudy
10:54 PM 71.1 °F - 66.0 °F 84% 29.94 in 8.0 mi South 5.8 mph - N/A   Partly Cloudy
11:54 PM 70.0 °F - 66.0 °F 87% 29.96 in 8.0 mi SSW 5.8 mph - N/A   Partly Cloudy