925  
CDUS41 KBOX 190809  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
309 AM EST SUN DEC 19 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 18 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 43 1159 PM 61 1915 42 1 30  
1928  
1990  
MINIMUM 33 509 PM -6 1919 29 4 21  
AVERAGE 38 35 3 26  
 
PRECIPITATION (IN)  
YESTERDAY 0.56 1.44 1951 0.14 0.42 0.00  
MONTH TO DATE 1.32 2.58 -1.26 3.05  
SINCE DEC 1 1.32 2.58 -1.26 3.05  
SINCE JAN 1 51.20 41.87 9.33 34.92  
 
SNOWFALL (IN)  
YESTERDAY 0.1 4.0 1904 0.3 -0.2 0.0  
MONTH TO DATE 0.4 4.3 -3.9 13.0  
SINCE DEC 1 0.4 4.3 -3.9 13.0  
SINCE JUL 1 0.4 5.2 -4.8 17.3  
 
DEGREE DAYS  
HEATING  
YESTERDAY 27 30 -3 39  
MONTH TO DATE 403 498 -95 510  
SINCE DEC 1 403 498 -95 510  
SINCE JUL 1 1191 1512 -321 1397  
 
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 4 RESULTANT WIND DIRECTION N (10)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 7.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
LIGHT SNOW  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 1000 PM  
LOWEST 45 1200 AM  
AVERAGE 71  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 41 64 1899  
MINIMUM TEMPERATURE (F) 28 -10 1875  
 
SUNRISE AND SUNSET  
DECEMBER 19 2021......SUNRISE 709 AM EST SUNSET 414 PM EST  
DECEMBER 20 2021......SUNRISE 710 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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