534 
CDUS41 KBOX 180526
CLIBOS

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1226 AM EST SAT DEC 18 2021

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

...THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 17 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         60    558 AM  64    2000  42     18       32       
  MINIMUM         42   1159 PM  -4    1876  29     13       21       
                                      1919                           
  AVERAGE         51                        35     16       27     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          2.82 1970   0.14  -0.14     0.30     
  MONTH TO DATE    0.76                      2.44  -1.68     3.05     
  SINCE DEC 1      0.76                      2.44  -1.68     3.05     
  SINCE JAN 1     50.64                     41.73   8.91    34.92     

SNOWFALL (IN)                                                              
  YESTERDAY        0.0          12.7  2020   0.3   -0.3     12.3      
  MONTH TO DATE    0.3                       4.0   -3.7     13.0      
  SINCE DEC 1      0.3                       4.0   -3.7     13.0      
  SINCE JUL 1      0.3                       4.9   -4.6     17.3      

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY       14                        30    -16       38        
  MONTH TO DATE  376                       468    -92      471        
  SINCE DEC 1    376                       468    -92      471        
  SINCE JUL 1   1164                      1482   -318     1358        

 COOLING                                                              
  YESTERDAY        0                         0      0        0        
  MONTH TO DATE    0                         0      0        0        
  SINCE DEC 1      0                         0      0        0        
  SINCE JAN 1   1146                       800    346      924        
...................................................................


WIND (MPH)                                                            
  RESULTANT WIND SPEED  15   RESULTANT WIND DIRECTION   W (270)       
  HIGHEST WIND SPEED    31   HIGHEST WIND DIRECTION     W (290)       
  HIGHEST GUST SPEED    41   HIGHEST GUST DIRECTION     W (290)       
  AVERAGE WIND SPEED    16.1                                        


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    71           100 AM                                      
 LOWEST     21           300 PM                                      
 AVERAGE    46                                                        

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


THE BOSTON MA CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   42        61      1915                      
                                             1928                     
                                             1990                     
 MINIMUM TEMPERATURE (F)   29        -6      1919                      


SUNRISE AND SUNSET                                                    
DECEMBER 18 2021......SUNRISE   708 AM EST   SUNSET   413 PM EST     
DECEMBER 19 2021......SUNRISE   709 AM EST   SUNSET   414 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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