709  
CDUS41 KBOX 210536  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
136 AM EDT TUE MAY 21 2024  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR MAY 20 2024
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1872 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 60 102 PM 91 1996 68 -8 66  
MINIMUM 52 500 AM 40 1892 51 1 53  
AVERAGE 56 60 -4 60  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.83 2023 0.11 -0.11 1.83  
MONTH TO DATE 2.72 2.03 0.69 2.11  
SINCE MAR 1 14.62 9.83 4.79 9.50  
SINCE JAN 1 22.91 16.43 6.48 16.09  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2000 0.0 0.0 0.0  
2001  
2002  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 0.1 10.6 -10.5 0.9  
SINCE JUL 1 9.8 49.2 -39.4 12.4  
 
DEGREE DAYS  
HEATING  
YESTERDAY 9 6 3 5  
MONTH TO DATE 192 174 18 127  
SINCE MAR 1 1373 1498 -125 1295  
SINCE JUL 1 4858 5436 -578 4611  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 0 12 -12 27  
SINCE MAR 1 0 16 -16 32  
SINCE JAN 1 0 16 -16 32    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION E (80)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 7.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 1200 AM  
LOWEST 77 200 PM  
AVERAGE 85  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 93 1921  
MINIMUM TEMPERATURE (F) 52 41 1907  
 
SUNRISE AND SUNSET  
MAY 21 2024...........SUNRISE 517 AM EDT SUNSET 805 PM EDT  
MAY 22 2024...........SUNRISE 516 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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