946  
CDUS41 KBOX 130550  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
1250 AM EST MON DEC 13 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 12 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 62 1202 AM 68 1911 43 19 47  
1979  
MINIMUM 38 1159 PM 2 1988 30 8 35  
AVERAGE 50 37 13 41  
 
PRECIPITATION (IN)  
YESTERDAY 0.04 4.21 1992 0.14 -0.10 0.50  
MONTH TO DATE 0.57 1.74 -1.17 2.65  
SINCE DEC 1 0.57 1.74 -1.17 2.65  
SINCE JAN 1 50.45 41.03 9.42 34.52  
 
SNOWFALL (IN)  
YESTERDAY MM 13.0 1960 0.3 MM 0.0  
MONTH TO DATE 0.3 2.6 -2.3 0.3  
SINCE DEC 1 0.3 2.6 -2.3 0.3  
SINCE JUL 1 0.3 3.5 -3.2 4.6  
 
DEGREE DAYS  
HEATING  
YESTERDAY 15 28 -13 24  
MONTH TO DATE 282 322 -40 313  
SINCE DEC 1 282 322 -40 313  
SINCE JUL 1 1070 1336 -266 1200  
 
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 37 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 47 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 17.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 80 1200 AM  
LOWEST 24 100 PM  
AVERAGE 52  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 63 1984  
MINIMUM TEMPERATURE (F) 30 4 1890  
1893  
1898  
 
SUNRISE AND SUNSET  
DECEMBER 13 2021......SUNRISE 705 AM EST SUNSET 412 PM EST  
DECEMBER 14 2021......SUNRISE 706 AM EST SUNSET 412 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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