789  
CDUS45 KTFX 180732  
CLILWT  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE GREAT FALLS MT  
132 AM MDT THU SEP 18 2025  
   
...............................
 
 
   
..THE LEWISTOWN MT CLIMATE SUMMARY FOR SEPTEMBER 17 2025
 
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1896 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 73 330 PM 91 2009 70 3 75  
MINIMUM 45 633 AM 23 1965 41 4 47  
AVERAGE 59 56 3 61  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.93 1946 0.04 -0.04 0.62  
MONTH TO DATE 0.92 0.78 0.14 1.71  
SINCE OCT 1 15.81 16.56 -0.75 16.61  
SINCE JAN 1 14.44 14.11 0.33 14.15  
 
SNOWFALL (IN)  
YESTERDAY MM  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 10 -4 4  
MONTH TO DATE 71 130 -59 46  
SINCE SEP 1 71 130 -59 46  
SINCE JUL 1 145 276 -131 151  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 11 14 -3 36  
SINCE SEP 1 11 14 -3 36  
SINCE JAN 1 163 224 -61 288    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 3.4  
 
SKY COVER  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 AM  
LOWEST 35 400 PM  
AVERAGE 68  
   
......................................................
 
 
THE LEWISTOWN MT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 90 1966  
MINIMUM TEMPERATURE (F) 41 19 1965  
 
SUNRISE AND SUNSET  
SEPTEMBER 18 2025.....SUNRISE 700 AM MDT SUNSET 723 PM MDT  
SEPTEMBER 19 2025.....SUNRISE 701 AM MDT SUNSET 721 PM MDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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