874  
CDUS41 KBOX 120621  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
221 AM EDT TUE OCT 12 2021  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR OCTOBER 11 2021
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1872 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 69 226 PM 82 1955 64 5 67  
MINIMUM 60 1112 PM 32 1881 49 11 51  
1979  
AVERAGE 65 56 9 59  
 
PRECIPITATION (IN)  
YESTERDAY T 0.85 2006 0.12 -0.12 0.00  
MONTH TO DATE 1.51 1.40 0.11 0.04  
SINCE SEP 1 8.98 4.96 4.02 1.01  
SINCE JAN 1 44.94 33.00 11.94 22.73  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2007 0.0 0.0 0.0  
2008  
2009  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 9 -9 6  
MONTH TO DATE 24 81 -57 64  
SINCE SEP 1 36 152 -116 134  
SINCE JUL 1 45 161 -116 136  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 6 -6 3  
SINCE SEP 1 156 97 59 97  
SINCE JAN 1 1132 797 335 924    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 8 RESULTANT WIND DIRECTION NE (50)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NE (50)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NE (40)  
AVERAGE WIND SPEED 8.1  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 1100 PM  
LOWEST 73 100 PM  
AVERAGE 83  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 63 90 1954  
MINIMUM TEMPERATURE (F) 49 31 1876  
 
SUNRISE AND SUNSET  
OCTOBER 12 2021.......SUNRISE 654 AM EDT SUNSET 607 PM EDT  
OCTOBER 13 2021.......SUNRISE 655 AM EDT SUNSET 605 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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