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134 
CDUS45 KMSO 180839
CLIBTM

CLIMATE REPORT 
NATIONAL WEATHER SERVICE MISSOULA MT
139 AM MST FRI DEC 18 2020

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

...THE BUTTE MT CLIMATE SUMMARY FOR DECEMBER 17 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1895 TO 2020


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         39    245 PM  53    1980  29     10       25       
                                      2013                           
  MINIMUM         28    909 AM -38    1964   5     23       11       
  AVERAGE         34                        17     17       18     

PRECIPITATION (IN)                                                    
  YESTERDAY        T             0.20 1982   0.02  -0.02     0.00     
  MONTH TO DATE    0.06                      0.28  -0.22      T       
  SINCE JAN 1     10.16                     12.54  -2.38    12.57     

SNOWFALL (IN)                                                              
  YESTERDAY       MM                                                  
  MONTH TO DATE   MM                                                  
  SINCE DEC 1     MM                                                  
  SINCE JUL 1     MM                                                  
  SNOW DEPTH      MM                                                  

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY       31                        48    -17       47        
  MONTH TO DATE  700                       801   -101      729        
  SINCE DEC 1    700                       801   -101      729        
  SINCE JUL 1   3047                      3291   -244     3320        

 COOLING                                                              
  YESTERDAY        0                         0      0        0        
  MONTH TO DATE    0                         0      0        0        
  SINCE DEC 1      0                         0      0        0        
  SINCE JAN 1     87                        81      6       84        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION     S (200)       
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION    SW (210)       
  AVERAGE WIND SPEED     5.4                                        


SKY COVER                                                             
  POSSIBLE SUNSHINE  MM                                                 
  AVERAGE SKY COVER 0.9                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  LIGHT SNOW                                                          


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    82           800 AM                                      
 LOWEST     47           600 PM                                      
 AVERAGE    65                                                        

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


THE BUTTE MT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   29        55      1979                      
 MINIMUM TEMPERATURE (F)    4       -32      1924                      


SUNRISE AND SUNSET                                                    
DECEMBER 18 2020......SUNRISE   807 AM MST   SUNSET   446 PM MST     
DECEMBER 19 2020......SUNRISE   808 AM MST   SUNSET   447 PM MST     


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




$$