928  
CDUS41 KBOX 172140  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
440 PM EST FRI DEC 17 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 17 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 60 558 AM 64 2000 42 18 32  
MINIMUM 52 1216 AM -4 1876 29 23 21  
1919  
AVERAGE 56 35 21 27  
 
PRECIPITATION (IN)  
TODAY 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)  
TODAY 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  
TODAY 9 30 -21 38  
MONTH TO DATE 371 468 -97 471  
SINCE DEC 1 371 468 -97 471  
SINCE JUL 1 1159 1482 -323 1358  
 
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 31 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 18.0  
 
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 71 100 AM  
LOWEST 21 300 PM  
AVERAGE 46  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 61 1915  
1928  
1990  
MINIMUM TEMPERATURE (F) 29 -6 1919  
 
SUNRISE AND SUNSET  
DECEMBER 17 2021......SUNRISE 708 AM EST SUNSET 413 PM EST  
DECEMBER 18 2021......SUNRISE 708 AM EST SUNSET 413 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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