573  
CDUS45 KTFX 152330  
CLILWT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
430 PM MST FRI DEC 15 2017  
 
   
...............................
 
 
   
..THE LEWISTOWN MT CLIMATE SUMMARY FOR DECEMBER 15 2017
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1896 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 51 343 PM 62 1980 34 17 16  
MINIMUM 26 353 AM -29 1964 12 14 0  
AVERAGE 39 23 16 8  
 
PRECIPITATION (IN)  
TODAY 0.00 0.80 1901 0.02 -0.02 T  
MONTH TO DATE 0.42 0.31 0.11 0.17  
SINCE OCT 1 1.80 2.15 -0.35 4.24  
SINCE JAN 1 12.41 16.50 -4.09 20.27  
 
DEGREE DAYS  
HEATING  
TODAY 26 42 -16 57  
MONTH TO DATE 479 613 -134 823  
SINCE DEC 1 479 613 -134 823  
SINCE JUL 1 2453 2741 -288 2549  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 375 210 165 259    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 11.3  
 
 
SKY COVER  
AVERAGE SKY COVER 0.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 68  
LOWEST 34  
AVERAGE 51  
   
......................................................
 
 
 
THE LEWISTOWN MT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 34 61 1980  
MINIMUM TEMPERATURE (F) 12 -31 1964  
 
 
SUNRISE AND SUNSET  
DECEMBER 15 2017......SUNRISE 757 AM MST SUNSET 429 PM MST  
DECEMBER 16 2017......SUNRISE 758 AM MST SUNSET 429 PM MST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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