534  
CDUS41 KBOX 180526  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
1226 AM EST SAT DEC 18 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 17 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 60 558 AM 64 2000 42 18 32  
MINIMUM 42 1159 PM -4 1876 29 13 21  
1919  
AVERAGE 51 35 16 27  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.82 1970 0.14 -0.14 0.30  
MONTH TO DATE 0.76 2.44 -1.68 3.05  
SINCE DEC 1 0.76 2.44 -1.68 3.05  
SINCE JAN 1 50.64 41.73 8.91 34.92  
 
SNOWFALL (IN)  
YESTERDAY 0.0 12.7 2020 0.3 -0.3 12.3  
MONTH TO DATE 0.3 4.0 -3.7 13.0  
SINCE DEC 1 0.3 4.0 -3.7 13.0  
SINCE JUL 1 0.3 4.9 -4.6 17.3  
 
DEGREE DAYS  
HEATING  
YESTERDAY 14 30 -16 38  
MONTH TO DATE 376 468 -92 471  
SINCE DEC 1 376 468 -92 471  
SINCE JUL 1 1164 1482 -318 1358  
 
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 15 RESULTANT WIND DIRECTION W (270)  
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 16.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 71 100 AM  
LOWEST 21 300 PM  
AVERAGE 46  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 61 1915  
1928  
1990  
MINIMUM TEMPERATURE (F) 29 -6 1919  
 
SUNRISE AND SUNSET  
DECEMBER 18 2021......SUNRISE 708 AM EST SUNSET 413 PM EST  
DECEMBER 19 2021......SUNRISE 709 AM EST SUNSET 414 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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