248  
CDUS41 KBOX 160614  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
214 AM EDT THU SEP 16 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 15 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 86 1246 PM 94 1915 74 12 61  
MINIMUM 68 1234 AM 41 1913 59 9 49  
AVERAGE 77 66 11 55  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.48 1904 0.12 -0.12 0.00  
MONTH TO DATE 5.49 1.64 3.85 0.46  
SINCE SEP 1 5.49 1.64 3.85 0.46  
SINCE JAN 1 41.45 29.68 11.77 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 2 -2 10  
MONTH TO DATE 0 16 -16 15  
SINCE SEP 1 0 16 -16 15  
SINCE JUL 1 9 25 -16 17  
 
COOLING  
YESTERDAY 12 3 9 0  
MONTH TO DATE 102 64 38 62  
SINCE SEP 1 102 64 38 62  
SINCE JAN 1 1078 764 314 889    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION S (200)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 11.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 700 AM  
LOWEST 59 400 PM  
AVERAGE 73  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 96 1939  
MINIMUM TEMPERATURE (F) 58 42 1984  
 
SUNRISE AND SUNSET  
SEPTEMBER 16 2021.....SUNRISE 625 AM EDT SUNSET 652 PM EDT  
SEPTEMBER 17 2021.....SUNRISE 626 AM EDT SUNSET 650 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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