748  
CDUS41 KBOX 210531  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
131 AM EDT TUE SEP 21 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 20 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 72 138 PM 97 1983 72 0 60  
MINIMUM 57 549 AM 42 1929 57 0 44  
1964  
1979  
AVERAGE 65 64 1 52  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.82 1899 0.13 -0.13 0.00  
MONTH TO DATE 6.14 2.28 3.86 0.46  
SINCE SEP 1 6.14 2.28 3.86 0.46  
SINCE JAN 1 42.10 30.32 11.78 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 3 -3 13  
MONTH TO DATE 0 28 -28 49  
SINCE SEP 1 0 28 -28 49  
SINCE JUL 1 9 37 -28 51  
 
COOLING  
YESTERDAY 0 2 -2 0  
MONTH TO DATE 117 76 41 65  
SINCE SEP 1 117 76 41 65  
SINCE JAN 1 1093 776 317 892    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION E (90)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 6.2  
 
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 84 500 AM  
LOWEST 53 200 PM  
AVERAGE 69  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 94 1895  
MINIMUM TEMPERATURE (F) 56 40 1904  
1929  
 
SUNRISE AND SUNSET  
SEPTEMBER 21 2021.....SUNRISE 631 AM EDT SUNSET 643 PM EDT  
SEPTEMBER 22 2021.....SUNRISE 632 AM EDT SUNSET 641 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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