116  
CDUS41 KBOX 212135  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
435 PM EST FRI DEC 21 2018  
 
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 21 2018
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1872 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 65R 223 PM 62 1957 39 26 33  
MINIMUM 43 1208 AM -5 1942 26 17 26  
AVERAGE 54 33 21 30  
 
PRECIPITATION (IN)  
TODAY 0.43 1.91 1946 0.13 0.30 0.00  
MONTH TO DATE 1.78 2.65 -0.87 1.36  
SINCE DEC 1 1.78 2.65 -0.87 1.36  
SINCE JAN 1 52.38 42.64 9.74 42.32  
 
SNOWFALL (IN)  
TODAY MM 10.1 1975 0.3 MM 0.0  
MONTH TO DATE 0.1 5.3 -5.2 6.1  
SINCE DEC 1 0.1 5.3 -5.2 6.1  
SINCE JUL 1 0.2 6.6 -6.4 6.1  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 11 32 -21 35  
MONTH TO DATE 583 602 -19 616  
SINCE DEC 1 583 602 -19 616  
SINCE JUL 1 1607 1657 -50 1443  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1132 747 385 880    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 33 HIGHEST WIND DIRECTION S (170)  
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 16.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 800 AM  
LOWEST 86 700 AM  
AVERAGE 91  
   
......................................................
 
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 39 62 1990  
MINIMUM TEMPERATURE (F) 26 1 1883  
1879  
 
 
SUNRISE AND SUNSET  
DECEMBER 21 2018......SUNRISE 710 AM EST SUNSET 415 PM EST  
DECEMBER 22 2018......SUNRISE 710 AM EST SUNSET 415 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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