937  
CDUS45 KMSO 202231  
CLIBTM  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE MISSOULA MT  
431 PM MDT WED MAY 20 2026  
   
...............................  
 
   
..THE BUTTE MT CLIMATE SUMMARY FOR MAY 20 2026  
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1895 TO 2026  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 56 259 PM 83 1919 63 -7 55  
MINIMUM 27 246 AM 23 2003 36 -9 35  
AVERAGE 42 49 -7 45  
 
PRECIPITATION (IN)  
TODAY T 1.20 1902 0.07 -0.07 0.00  
MONTH TO DATE 0.07 1.10 -1.03 2.36  
SINCE JAN 1 3.15 3.92 -0.77 4.80  
 
SNOWFALL (IN)  
TODAY MM  
MONTH TO DATE MM  
SINCE MAR 1 MM  
SINCE JUL 1 MM  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 23 16 7 20  
MONTH TO DATE 360 381 -21 353  
SINCE MAR 1 1928 2205 -277 2018  
SINCE JUL 1 6912 8680 -1768 8032  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 4.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 100 AM  
LOWEST 29 100 PM  
AVERAGE 57  
   
......................................................  
 
THE BUTTE MT CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 63 84 1919  
MINIMUM TEMPERATURE (F) 36 12 1938  
 
SUNRISE AND SUNSET  
MAY 20 2026...........SUNRISE 552 AM MDT SUNSET 901 PM MDT  
MAY 21 2026...........SUNRISE 551 AM MDT SUNSET 902 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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