563 
CDUS41 KBOX 200532
CLIBOS

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
132 AM EDT THU MAY 20 2021

...................................

...THE BOSTON MA CLIMATE SUMMARY FOR MAY 19 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         72   1232 AM  90    1949  67      5       55       
                                      1986                           
                                      2017                           
  MINIMUM         58   1149 PM  38    1882  51      7       47       
  AVERAGE         65                        59      6       51     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          1.55 1900   0.10  -0.10     0.00     
  MONTH TO DATE    1.60                      1.92  -0.32     2.12     
  SINCE MAR 1      7.93                      9.72  -1.79    10.05     
  SINCE JAN 1     13.00                     16.32  -3.32    14.74     

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       T       
  SINCE MAR 1      0.2                      10.6  -10.4      0.7      
  SINCE JUL 1     38.6                      49.2  -10.6     15.8      

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY        0                         7     -7       14        
  MONTH TO DATE  111                       168    -57      221        
  SINCE MAR 1   1235                      1492   -257     1540        
  SINCE JUL 1   5012                      5430   -418     4923        

 COOLING                                                              
  YESTERDAY        0                         1     -1        0        
  MONTH TO DATE   16                        11      5        1        
  SINCE MAR 1     16                        15      1        1        
  SINCE JAN 1     16                        15      1        1        
...................................................................


WIND (MPH)                                                            
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION   E (90)        
  HIGHEST WIND SPEED    17   HIGHEST WIND DIRECTION     E (100)       
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     N (360)       
  AVERAGE WIND SPEED    10.2                                        


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    56          1100 PM                                      
 LOWEST     32           800 AM                                      
 AVERAGE    44                                                        

..........................................................


THE BOSTON MA CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   68        91      1996                      
 MINIMUM TEMPERATURE (F)   51        40      1892                      


SUNRISE AND SUNSET                                                    
MAY 20 2021...........SUNRISE   518 AM EDT   SUNSET   804 PM EDT     
MAY 21 2021...........SUNRISE   517 AM EDT   SUNSET   805 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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