862  
CDUS41 KBOX 182203  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
503 PM EST SAT DEC 18 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 18 2021
 
 
VALID TODAY AS OF 0500 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 43 1241 AM 61 1915 42 1 30  
1928  
1990  
MINIMUM 34 359 PM -6 1919 29 5 21  
AVERAGE 39 35 4 26  
 
PRECIPITATION (IN)  
TODAY 0.08 1.44 1951 0.14 -0.06 0.00  
MONTH TO DATE 0.84 2.58 -1.74 3.05  
SINCE DEC 1 0.84 2.58 -1.74 3.05  
SINCE JAN 1 50.72 41.87 8.85 34.92  
 
SNOWFALL (IN)  
TODAY 0.0 4.0 1904 0.3 -0.3 0.0  
MONTH TO DATE 0.3 4.3 -4.0 13.0  
SINCE DEC 1 0.3 4.3 -4.0 13.0  
SINCE JUL 1 0.3 5.2 -4.9 17.3  
 
DEGREE DAYS  
HEATING  
TODAY 26 30 -4 39  
MONTH TO DATE 402 498 -96 510  
SINCE DEC 1 402 498 -96 510  
SINCE JUL 1 1190 1512 -322 1397  
 
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 13 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 6.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
LIGHT SNOW  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 300 PM  
LOWEST 45 1200 AM  
AVERAGE 69  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 41 64 1899  
MINIMUM TEMPERATURE (F) 28 -10 1875  
 
SUNRISE AND SUNSET  
DECEMBER 18 2021......SUNRISE 708 AM EST SUNSET 413 PM EST  
DECEMBER 19 2021......SUNRISE 709 AM EST SUNSET 414 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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