509  
CDUS41 KBOX 120526  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
126 AM EDT SUN SEP 12 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 11 2021
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1872 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 79 239 PM 99 1983 75 4 74  
MINIMUM 59 548 AM 40 1917 60 -1 57  
AVERAGE 69 67 2 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 5.63 1954 0.11 -0.11 T  
MONTH TO DATE 5.43 1.17 4.26 0.46  
SINCE SEP 1 5.43 1.17 4.26 0.46  
SINCE JAN 1 41.39 29.21 12.18 22.18  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2000 0.0 0.0 0.0  
2001  
2002  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 0 9 -9 0  
SINCE SEP 1 0 9 -9 0  
SINCE JUL 1 9 18 -9 2  
 
COOLING  
YESTERDAY 4 4 0 1  
MONTH TO DATE 69 52 17 61  
SINCE SEP 1 69 52 17 61  
SINCE JAN 1 1045 752 293 888    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION SW (240)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 11.0  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 73 1100 PM  
LOWEST 39 1200 PM  
AVERAGE 56  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 93 1961  
MINIMUM TEMPERATURE (F) 60 43 1875  
 
SUNRISE AND SUNSET  
SEPTEMBER 12 2021.....SUNRISE 621 AM EDT SUNSET 659 PM EDT  
SEPTEMBER 13 2021.....SUNRISE 622 AM EDT SUNSET 657 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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