380 
CDUS41 KBOX 200614
CLIBOS

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
114 AM EST SUN DEC 20 2020

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

...THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 19 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2020


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         31    106 PM  64    1899  40     -9       27       
  MINIMUM         17    757 AM -10    1875  27    -10       15       
  AVERAGE         24                        34    -10       21     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          1.35 1986   0.12  -0.12     0.00     
  MONTH TO DATE    4.05                      2.41   1.64     4.42     
  SINCE DEC 1      4.05                      2.41   1.64     4.42     
  SINCE JAN 1     35.92                     42.40  -6.48    48.73     

SNOWFALL (IN)                                                              
  YESTERDAY        0.0          10.0  1945   0.3   -0.3      0.0      
  MONTH TO DATE   13.0                       4.7    8.3     11.5      
  SINCE DEC 1     13.0                       4.7    8.3     11.5      
  SINCE JUL 1     17.3                       6.0   11.3     11.5      

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY       41                        31     10       44        
  MONTH TO DATE  551                       538     13      538        
  SINCE DEC 1    551                       538     13      538        
  SINCE JUL 1   1438                      1593   -155     1460        

 COOLING                                                              
  YESTERDAY        0                         0      0        0        
  MONTH TO DATE    0                         0      0        0        
  SINCE DEC 1      0                         0      0        0        
  SINCE JAN 1    924                       747    177     1013        
...................................................................


WIND (MPH)                                                            
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION   W (280)       
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION    NW (310)       
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    NW (310)       
  AVERAGE WIND SPEED     6.0                                        


SKY COVER                                                             
  POSSIBLE SUNSHINE  MM                                                 
  AVERAGE SKY COVER 0.5                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  NO SIGNIFICANT WEATHER WAS OBSERVED.                                  


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    77           900 AM                                      
 LOWEST     60           100 PM                                      
 AVERAGE    69                                                        

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


THE BOSTON MA CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   40        63      1957                      
 MINIMUM TEMPERATURE (F)   27       -11      1875                      
                                             1942                     


SUNRISE AND SUNSET                                                    
DECEMBER 20 2020......SUNRISE   710 AM EST   SUNSET   414 PM EST     
DECEMBER 21 2020......SUNRISE   710 AM EST   SUNSET   415 PM EST     


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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