136  
CDUS41 KBOX 210549  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
148 AM EDT TUE MAY 21 2019  
 
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR MAY 20 2019
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1872 TO 2019  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 88 233 PM 91 1996 67 21 81  
MINIMUM 66 1228 AM 40 1892 51 15 54  
AVERAGE 77 59 18 68  
 
PRECIPITATION (IN)  
YESTERDAY 0.13 1.23 1969 0.12 0.01 0.08  
MONTH TO DATE 2.37 2.11 0.26 1.77  
SINCE MAR 1 11.84 10.17 1.67 11.46  
SINCE JAN 1 18.91 16.78 2.13 20.15  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2002 0.0 0.0 0.0  
2001  
2000  
MONTH TO DATE 0.0 0.1 -0.1 0.0  
SINCE MAR 1 13.5 9.8 3.7 24.6  
SINCE JUL 1 27.4 43.9 -16.5 59.9  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 7 -7 0  
MONTH TO DATE 199 186 13 126  
SINCE MAR 1 1393 1525 -132 1562  
SINCE JUL 1 5199 5567 -368 5314  
 
COOLING  
YESTERDAY 12 1 11 3  
MONTH TO DATE 12 7 5 37  
SINCE MAR 1 20 10 10 37  
SINCE JAN 1 20 10 10 37    
..............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 13 RESULTANT WIND DIRECTION SW (230)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 14.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 100 AM  
LOWEST 42 200 PM  
AVERAGE 65  
   
......................................................
 
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 93 1921  
MINIMUM TEMPERATURE (F) 51 41 1907  
 
 
SUNRISE AND SUNSET  
MAY 21 2019...........SUNRISE 517 AM EDT SUNSET 805 PM EDT  
MAY 22 2019...........SUNRISE 517 AM EDT SUNSET 806 PM EDT  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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