970  
CDUS41 KBOX 172121  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
521 PM EDT FRI SEP 17 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 17 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 70 209 PM 91 1915 73 -3 78  
MINIMUM 65 140 AM 44 2013 58 7 58  
AVERAGE 68 65 3 68  
 
PRECIPITATION (IN)  
TODAY 0.00 2.77 1995 0.13 -0.13 0.00  
MONTH TO DATE 5.80 1.90 3.90 0.46  
SINCE SEP 1 5.80 1.90 3.90 0.46  
SINCE JAN 1 41.76 29.94 11.82 22.18  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 2 -2 0  
MONTH TO DATE 0 20 -20 18  
SINCE SEP 1 0 20 -20 18  
SINCE JUL 1 9 29 -20 20  
 
COOLING  
TODAY 3 3 0 3  
MONTH TO DATE 110 70 40 65  
SINCE SEP 1 110 70 40 65  
SINCE JAN 1 1086 770 316 892    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 9.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 700 AM  
LOWEST 78 1200 PM  
AVERAGE 83  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 90 1891  
1906  
1955  
MINIMUM TEMPERATURE (F) 58 43 1875  
 
SUNRISE AND SUNSET  
SEPTEMBER 17 2021.....SUNRISE 626 AM EDT SUNSET 650 PM EDT  
SEPTEMBER 18 2021.....SUNRISE 627 AM EDT SUNSET 648 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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