496  
CDUS41 KBOX 212120  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
520 PM EDT TUE SEP 21 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 21 2021
 
 
VALID 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 73 345 PM 94 1895 71 2 61  
MINIMUM 57 555 AM 40 1904 56 1 45  
1929  
AVERAGE 65 64 1 53  
 
PRECIPITATION (IN)  
TODAY 0.00 2.77 1961 0.13 -0.13 0.00  
MONTH TO DATE 6.14 2.41 3.73 0.46  
SINCE SEP 1 6.14 2.41 3.73 0.46  
SINCE JAN 1 42.10 30.45 11.65 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  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3 12  
MONTH TO DATE 0 31 -31 61  
SINCE SEP 1 0 31 -31 61  
SINCE JUL 1 9 40 -31 63  
 
COOLING  
TODAY 0 2 -2 0  
MONTH TO DATE 117 78 39 65  
SINCE SEP 1 117 78 39 65  
SINCE JAN 1 1093 778 315 892    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (80)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION E (80)  
AVERAGE WIND SPEED 5.7  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 600 AM  
LOWEST 70 800 AM  
AVERAGE 77  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 94 1895  
MINIMUM TEMPERATURE (F) 56 35 1904  
 
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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