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CDUS41 KBOX 200533
CLIBOS

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1233 AM EST MON DEC 20 2021

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

...THE BOSTON MA CLIMATE SUMMARY FOR DECEMBER 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         44    230 AM  64    1899  41      3       31       
  MINIMUM         23   1159 PM -10    1875  28     -5       17       
  AVERAGE         34                        35     -1       24     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.38          1.35 1986   0.15   0.23     0.00     
  MONTH TO DATE    1.70                      2.73  -1.03     3.05     
  SINCE DEC 1      1.70                      2.73  -1.03     3.05     
  SINCE JAN 1     51.58                     42.02   9.56    34.92     

SNOWFALL (IN)                                                              
  YESTERDAY        0.0          10.0  1945   0.3   -0.3      0.0      
  MONTH TO DATE    0.4                       4.6   -4.2     13.0      
  SINCE DEC 1      0.4                       4.6   -4.2     13.0      
  SINCE JUL 1      0.4                       5.5   -5.1     17.3      

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY       31                        30      1       41        
  MONTH TO DATE  434                       528    -94      551        
  SINCE DEC 1    434                       528    -94      551        
  SINCE JUL 1   1222                      1542   -320     1438        

 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  14   RESULTANT WIND DIRECTION  NW (330)       
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION    NW (320)       
  HIGHEST GUST SPEED    33   HIGHEST GUST DIRECTION    NW (330)       
  AVERAGE WIND SPEED    14.7                                        


SKY COVER                                                             
  POSSIBLE SUNSHINE  MM                                                 
  AVERAGE SKY COVER 0.7                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  HEAVY RAIN                                                          
  RAIN                                                                
  LIGHT RAIN                                                          
  LT FREEZING RAIN                                                    
  LIGHT SNOW                                                          
  SLEET                                                               
  FOG                                                                 


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           100 AM                                      
 LOWEST     58           800 PM                                      
 AVERAGE    79                                                        

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


THE BOSTON MA CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   41        63      1957                      
 MINIMUM TEMPERATURE (F)   28       -11      1875                      
                                             1942                     


SUNRISE AND SUNSET                                                    
DECEMBER 20 2021......SUNRISE   710 AM EST   SUNSET   414 PM EST     
DECEMBER 21 2021......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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