673  
CDUS41 KBOX 210620  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
120 AM EST TUE DEC 21 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 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 33 252 PM 63 1957 41 -8 36  
MINIMUM 20 752 AM -11 1875 28 -8 26  
1942  
AVERAGE 27 35 -8 31  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.35 1936 0.13 -0.13 0.03  
MONTH TO DATE 1.70 2.86 -1.16 3.08  
SINCE DEC 1 1.70 2.86 -1.16 3.08  
SINCE JAN 1 51.58 42.15 9.43 34.95  
 
SNOWFALL (IN)  
YESTERDAY 0.0 10.0 2009 0.3 -0.3 T  
MONTH TO DATE 0.4 4.9 -4.5 13.0  
SINCE DEC 1 0.4 4.9 -4.5 13.0  
SINCE JUL 1 0.4 5.8 -5.4 17.3  
 
DEGREE DAYS  
HEATING  
YESTERDAY 38 30 8 34  
MONTH TO DATE 472 558 -86 585  
SINCE DEC 1 472 558 -86 585  
SINCE JUL 1 1260 1572 -312 1472  
 
COOLING  
YESTERDAY 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)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION W (270)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 9.2  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 68 100 AM  
LOWEST 41 200 PM  
AVERAGE 55  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 41 65 2018  
MINIMUM TEMPERATURE (F) 28 -5 1942  
 
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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