250  
CDUS41 KBOX 202122  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
422 PM EST THU DEC 20 2018  
 
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 20 2018
 
 
VALID 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 50 149 PM 63 1957 40 10 47  
MINIMUM 32 425 AM -11 1942 27 5 31  
1875  
AVERAGE 41 33 8 39  
 
PRECIPITATION (IN)  
TODAY 0.00 1.35 1936 0.11 -0.11 0.00  
MONTH TO DATE 1.35 2.52 -1.17 1.36  
SINCE DEC 1 1.35 2.52 -1.17 1.36  
SINCE JAN 1 51.95 42.51 9.44 42.32  
 
SNOWFALL (IN)  
TODAY 0.0 10.0 2009 0.3 -0.3 0.0  
MONTH TO DATE 0.1 5.0 -4.9 6.1  
SINCE DEC 1 0.1 5.0 -4.9 6.1  
SINCE JUL 1 0.2 6.3 -6.1 6.1  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 24 32 -8 26  
MONTH TO DATE 572 570 2 581  
SINCE DEC 1 572 570 2 581  
SINCE JUL 1 1596 1625 -29 1408  
 
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 15 HIGHEST WIND DIRECTION W (250)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SW (240)  
AVERAGE WIND SPEED 9.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 64 700 AM  
LOWEST 42 100 PM  
AVERAGE 53  
   
......................................................
 
 
 
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 39 62 1957  
MINIMUM TEMPERATURE (F) 26 -5 1942  
 
 
SUNRISE AND SUNSET  
DECEMBER 20 2018......SUNRISE 709 AM EST SUNSET 414 PM EST  
DECEMBER 21 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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