Weather History for KBOS - September, 2012

Change the Weather History Date:

Tuesday, September 11, 2012

  Actual Average Record
Temperature  
Mean Temperature 63 °F 67 °F  
Max Temperature 73 °F 74 °F 99 °F (1983)
Min Temperature 53 °F 59 °F 40 °F (1917)
Degree Days  
Heating Degree Days 2 2  
Month to date heating degree days 4 12  
Since 1 July heating degree days 4 25  
Cooling Degree Days 0 3  
Month to date cooling degree days 54 46  
Year to date cooling degree days 881 705  
Growing Degree Days 13 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 49    
Maximum Humidity 69    
Minimum Humidity 29    
Precipitation  
Precipitation 0.00 in 0.10 in 5.63 in (1954)
Month to date precipitation 2.24 1.14  
Year to date precipitation 25.31 29.76  
Sea Level Pressure  
Sea Level Pressure 30.18 in    
Wind  
Wind Speed 8 mph (West)    
Max Wind Speed 15 mph    
Max Gust Speed 22 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport or City:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Sep. 11, 2012 Rise Set
Actual Time 6:20 AM EDT 6:59 PM EDT
Civil Twilight 5:51 AM EDT 7:28 PM EDT
Nautical Twilight 5:18 AM EDT 8:01 PM EDT
Astronomical Twilight 4:43 AM EDT 8:36 PM EDT
Moon 1:29 AM EDT (9/11) 4:12 PM EDT (9/11)
Length of Visible Light 13h 36m
Length of Day
12h 39m
Waning Crescent, 21% of the Moon is Illuminated
Sep 11
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 55.9 °F 42.1 °F 60% 30.06 in 10.0 mi WNW 10.4 mph - N/A   Clear
1:54 AM 55.9 °F 42.1 °F 60% 30.07 in 10.0 mi WNW 12.7 mph 19.6 mph N/A   Clear
2:54 AM 55.0 °F 43.0 °F 64% 30.07 in 10.0 mi WNW 10.4 mph - N/A   Clear
3:54 AM 54.0 °F 42.1 °F 64% 30.08 in 10.0 mi WNW 11.5 mph - N/A   Clear
4:54 AM 53.1 °F 41.0 °F 64% 30.10 in 10.0 mi WNW 10.4 mph - N/A   Clear
5:54 AM 53.1 °F 41.0 °F 64% 30.13 in 10.0 mi WNW 10.4 mph - N/A   Clear
6:54 AM 53.1 °F 41.0 °F 64% 30.16 in 10.0 mi WNW 12.7 mph - N/A   Partly Cloudy
7:54 AM 55.0 °F 41.0 °F 59% 30.19 in 10.0 mi NW 11.5 mph - N/A   Partly Cloudy
8:54 AM 59.0 °F 42.1 °F 53% 30.20 in 10.0 mi NW 8.1 mph - N/A   Partly Cloudy
9:54 AM 62.1 °F 42.1 °F 48% 30.22 in 10.0 mi Variable 4.6 mph - N/A   Partly Cloudy
10:54 AM 64.0 °F 42.1 °F 45% 30.22 in 10.0 mi WNW 3.5 mph - N/A   Partly Cloudy
11:54 AM 64.9 °F 45.0 °F 48% 30.21 in 10.0 mi SSE 3.5 mph - N/A   Partly Cloudy
12:54 PM 64.9 °F 46.9 °F 52% 30.21 in 10.0 mi SE 9.2 mph - N/A   Partly Cloudy
1:54 PM 69.1 °F 41.0 °F 36% 30.19 in 10.0 mi South 5.8 mph - N/A   Partly Cloudy
2:54 PM 72.0 °F 37.9 °F 29% 30.18 in 10.0 mi WNW 5.8 mph - N/A   Partly Cloudy
3:54 PM 72.0 °F 42.1 °F 34% 30.18 in 10.0 mi Variable 5.8 mph - N/A   Partly Cloudy
4:54 PM 73.0 °F 41.0 °F 31% 30.18 in 10.0 mi Variable 6.9 mph - N/A   Partly Cloudy
5:54 PM 72.0 °F 42.1 °F 34% 30.19 in 10.0 mi WSW 6.9 mph - N/A   Scattered Clouds
6:54 PM 69.1 °F 45.0 °F 42% 30.20 in 10.0 mi SW 10.4 mph - N/A   Mostly Cloudy
7:54 PM 66.9 °F 46.9 °F 49% 30.22 in 10.0 mi SW 10.4 mph - N/A   Partly Cloudy
8:54 PM 63.0 °F 48.9 °F 60% 30.24 in 10.0 mi SSW 9.2 mph - N/A   Clear
9:54 PM 62.1 °F 51.1 °F 67% 30.25 in 10.0 mi SW 8.1 mph - N/A   Clear
10:54 PM 61.0 °F 50.0 °F 67% 30.25 in 10.0 mi SW 5.8 mph - N/A   Clear
11:54 PM 62.1 °F 46.9 °F 58% 30.26 in 10.0 mi West 4.6 mph - N/A   Clear