600  
CDUS41 KBOX 212118  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
418 PM EST TUE DEC 21 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 21 2021
 
 
VALID TODAY AS OF 0400 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 44 129 PM 65 2018 41 3 37  
MINIMUM 30 158 AM -5 1942 28 2 27  
AVERAGE 37 34 3 32  
 
PRECIPITATION (IN)  
TODAY 0.00 1.91 1946 0.15 -0.15 0.00  
MONTH TO DATE 1.70 3.01 -1.31 3.08  
SINCE DEC 1 1.70 3.01 -1.31 3.08  
SINCE JAN 1 51.58 42.30 9.28 34.95  
 
SNOWFALL (IN)  
TODAY MM 10.1 1975 0.4 MM 0.0  
MONTH TO DATE 0.4 5.3 -4.9 13.0  
SINCE DEC 1 0.4 5.3 -4.9 13.0  
SINCE JUL 1 0.4 6.2 -5.8 17.3  
 
DEGREE DAYS  
HEATING  
TODAY 28 31 -3 33  
MONTH TO DATE 500 589 -89 618  
SINCE DEC 1 500 589 -89 618  
SINCE JUL 1 1288 1603 -315 1505  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1146 800 346 924    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 11.7  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 69 200 AM  
LOWEST 43 100 PM  
AVERAGE 56  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 41 62 1990  
MINIMUM TEMPERATURE (F) 28 1 1879  
1883  
 
SUNRISE AND SUNSET  
DECEMBER 21 2021......SUNRISE 710 AM EST SUNSET 415 PM EST  
DECEMBER 22 2021......SUNRISE 711 AM EST SUNSET 415 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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