400  
CDUS41 KBOX 132120  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
420 PM EST MON DEC 13 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 13 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 52 303 PM 63 1984 43 9 59  
MINIMUM 37 1251 AM 4 1890 30 7 40  
1893  
1898  
AVERAGE 45 36 9 50  
 
PRECIPITATION (IN)  
TODAY 0.00 1.67 1873 0.14 -0.14 0.00  
MONTH TO DATE 0.57 1.88 -1.31 2.65  
SINCE DEC 1 0.57 1.88 -1.31 2.65  
SINCE JAN 1 50.45 41.17 9.28 34.52  
 
SNOWFALL (IN)  
TODAY 0.0 10.1 2007 0.3 -0.3 0.0  
MONTH TO DATE 0.3 2.9 -2.6 0.3  
SINCE DEC 1 0.3 2.9 -2.6 0.3  
SINCE JUL 1 0.3 3.8 -3.5 4.6  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 20 29 -9 15  
MONTH TO DATE 302 351 -49 328  
SINCE DEC 1 302 351 -49 328  
SINCE JUL 1 1090 1365 -275 1215  
 
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 23 HIGHEST WIND DIRECTION SW (240)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 16.4  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 48 200 AM  
LOWEST 28 300 PM  
AVERAGE 38  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 66 1881  
MINIMUM TEMPERATURE (F) 30 0 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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