833  
CDUS41 KBOX 170730  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
230 AM EST FRI DEC 17 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 16 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 60 300 PM 64 1971 42 18 30  
MINIMUM 45 1240 AM 1 1876 29 16 16  
1883  
AVERAGE 53 36 17 23  
 
PRECIPITATION (IN)  
YESTERDAY 0.17 1.81 1960 0.14 0.03 0.04  
MONTH TO DATE 0.76 2.30 -1.54 2.75  
SINCE DEC 1 0.76 2.30 -1.54 2.75  
SINCE JAN 1 50.64 41.59 9.05 34.62  
 
SNOWFALL (IN)  
YESTERDAY 0.0 7.6 2007 0.3 -0.3 0.4  
MONTH TO DATE 0.3 3.7 -3.4 0.7  
SINCE DEC 1 0.3 3.7 -3.4 0.7  
SINCE JUL 1 0.3 4.6 -4.3 5.0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 12 29 -17 42  
MONTH TO DATE 362 438 -76 433  
SINCE DEC 1 362 438 -76 433  
SINCE JUL 1 1150 1452 -302 1320  
 
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 14 RESULTANT WIND DIRECTION SW (220)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 14.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 200 AM  
LOWEST 47 300 PM  
AVERAGE 72  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 64 2000  
MINIMUM TEMPERATURE (F) 29 -4 1876  
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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