109  
CDUS41 KBOX 112131  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
431 PM EST SAT DEC 11 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 11 2021
 
 
VALID 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 61 359 PM 68 1911 43 18 51  
MINIMUM 35 1241 AM -2 1876 31 4 28  
AVERAGE 48 37 11 40  
 
PRECIPITATION (IN)  
TODAY 0.25 1.52 1936 0.14 0.11 0.00  
MONTH TO DATE 0.53 1.60 -1.07 2.15  
SINCE DEC 1 0.53 1.60 -1.07 2.15  
SINCE JAN 1 50.41 40.89 9.52 34.02  
 
SNOWFALL (IN)  
TODAY 0.0 2.8 2019 0.2 -0.2 0.0  
MONTH TO DATE 0.3 2.3 -2.0 0.3  
SINCE DEC 1 0.3 2.3 -2.0 0.3  
SINCE JUL 1 0.3 3.2 -2.9 4.6  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 17 28 -11 25  
MONTH TO DATE 269 294 -25 289  
SINCE DEC 1 269 294 -25 289  
SINCE JUL 1 1057 1308 -251 1176  
 
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 25 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 6.7  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1000 AM  
LOWEST 78 200 AM  
AVERAGE 89  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 68 1911  
1979  
MINIMUM TEMPERATURE (F) 30 2 1988  
 
SUNRISE AND SUNSET  
DECEMBER 11 2021......SUNRISE 703 AM EST SUNSET 412 PM EST  
DECEMBER 12 2021......SUNRISE 704 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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