438  
CDUS41 KBOX 190545  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
1235 AM EST WED DEC 19 2018  
 
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 18 2018
 
 
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)  
YESTERDAY  
MAXIMUM 39 1247 AM 61 1990 40 -1 38  
1928  
1915  
MINIMUM 25 1159 PM -6 1919 27 -2 22  
AVERAGE 32 34 -2 30  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 1.44 1951 0.12 -0.10 T  
MONTH TO DATE 1.35 2.29 -0.94 1.36  
SINCE DEC 1 1.35 2.29 -0.94 1.36  
SINCE JAN 1 51.95 42.28 9.67 42.32  
 
SNOWFALL (IN)  
YESTERDAY 0.1 4.0 1904 0.4 -0.3 T  
MONTH TO DATE 0.1 4.4 -4.3 6.1  
SINCE DEC 1 0.1 4.4 -4.3 6.1  
SINCE JUL 1 0.2 5.7 -5.5 6.1  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 33 31 2 35  
MONTH TO DATE 516 507 9 533  
SINCE DEC 1 516 507 9 533  
SINCE JUL 1 1540 1562 -22 1360  
 
COOLING  
YESTERDAY 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)  
RESULTANT WIND SPEED 21 RESULTANT WIND DIRECTION NW (310)  
HIGHEST WIND SPEED 32 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 45 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 20.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 100 AM  
LOWEST 36 1200 PM  
AVERAGE 56  
   
......................................................
 
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 40 64 1899  
MINIMUM TEMPERATURE (F) 27 -10 1875  
 
 
SUNRISE AND SUNSET  
DECEMBER 19 2018......SUNRISE 709 AM EST SUNSET 414 PM EST  
DECEMBER 20 2018......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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