623  
CDUS41 KBOX 180557  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
1255 AM EST TUE DEC 18 2018  
 
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 17 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 43 600 PM 64 2000 41 2 31  
MINIMUM 36 709 AM -4 1919 28 8 20  
1876  
AVERAGE 40 34 6 26  
 
PRECIPITATION (IN)  
YESTERDAY 0.04 2.82 1970 0.12 -0.08 0.00  
MONTH TO DATE 1.33 2.17 -0.84 1.36  
SINCE DEC 1 1.33 2.17 -0.84 1.36  
SINCE JAN 1 51.93 42.16 9.77 42.32  
 
SNOWFALL (IN)  
YESTERDAY T 6.4 2013 0.3 -0.3 0.0  
MONTH TO DATE T 4.0 -4.0 6.1  
SINCE DEC 1 T 4.0 -4.0 6.1  
SINCE JUL 1 0.1 5.3 -5.2 6.1  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 25 31 -6 39  
MONTH TO DATE 483 476 7 498  
SINCE DEC 1 483 476 7 498  
SINCE JUL 1 1507 1531 -24 1325  
 
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 12 RESULTANT WIND DIRECTION NW (320)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION NE (30)  
AVERAGE WIND SPEED 14.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
SNOW  
LIGHT SNOW  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 300 AM  
LOWEST 59 800 PM  
AVERAGE 76  
   
......................................................
 
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 40 61 1990  
1928  
1915  
MINIMUM TEMPERATURE (F) 27 -6 1919  
 
 
SUNRISE AND SUNSET  
DECEMBER 18 2018......SUNRISE 708 AM EST SUNSET 413 PM EST  
DECEMBER 19 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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