678  
CDUS41 KBOX 100539  
CLIBOS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
139 AM EDT WED MAY 10 2023  
   
...............................
 
 
   
..THE BOSTON MA CLIMATE SUMMARY FOR MAY 9 2023
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1872 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 57 1006 AM 95 1979 65 -8 56  
MINIMUM 50 1004 PM 35 1977 48 2 41  
AVERAGE 54 56 -2 49  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.50 1954 0.10 -0.10 0.00  
MONTH TO DATE 0.28 0.95 -0.67 0.37  
SINCE MAR 1 7.67 8.75 -1.08 5.62  
SINCE JAN 1 14.26 15.35 -1.09 12.56  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1977 0.0 0.0 0.0  
2020  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 0.9 10.6 -9.7 2.1  
SINCE JUL 1 12.4 49.2 -36.8 54.0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 11 9 2 16  
MONTH TO DATE 79 91 -12 117  
SINCE MAR 1 1247 1415 -168 1281  
SINCE JUL 1 4563 5353 -790 4903  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 4 1 3 0  
SINCE MAR 1 9 5 4 0  
SINCE JAN 1 9 5 4 0    
...............................................................
 
 
WIND (MPH)  
RESULTANT WIND SPEED 6 RESULTANT WIND DIRECTION E (100)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 10.7  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 69 200 AM  
LOWEST 39 400 AM  
AVERAGE 54  
   
......................................................
 
 
THE BOSTON MA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 94 1896  
1979  
MINIMUM TEMPERATURE (F) 49 34 1900  
1902  
2020  
 
SUNRISE AND SUNSET  
MAY 10 2023...........SUNRISE 528 AM EDT SUNSET 753 PM EDT  
MAY 11 2023...........SUNRISE 527 AM EDT SUNSET 754 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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