894
CXUS55 KMSO 022142
CLMBTM
CLIMATE REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
342 PM MDT THU OCT 02 2025
...............................
..THE BUTTE MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1895 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 96 09/03/2022
LOW 3 09/24/1926
HIGHEST 88 09/03 MM MM 89
LOWEST 29 09/23 MM MM 26
AVG. MAXIMUM 74.2 69.1 5.1 74.6
AVG. MINIMUM 39.2 36.5 2.7 39.4
MEAN 56.7 52.8 3.9 57.0
DAYS MAX >= 90 0 0.3 -0.3 0
DAYS MAX <= 32 0 0.1 -0.1 0
DAYS MIN <= 32 2 8.7 -6.7 3
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.54 1947
MINIMUM 0.00 1904
TOTALS 0.59 1.07 -0.48 0.80
DAILY AVG. 0.02 0.04 -0.02 0.03
DAYS >= .01 8 6.9 1.1 6
DAYS >= .10 3 3.1 -0.1 3
DAYS >= .50 0 0.6 -0.6 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.14 09/09 TO 09/10 0.35
DEGREE DAYS
HEATING TOTAL 242 368 -126
SINCE 7/1 393 583 -190
COOLING TOTAL 3 2 1
SINCE 1/1 60 83 -23
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WIND (MPH)
AVERAGE WIND SPEED 4.5
HIGHEST WIND SPEED/DIRECTION 29/250 DATE 09/14
HIGHEST GUST SPEED/DIRECTION 45/250 DATE 09/14
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.18
NUMBER OF DAYS FAIR 25
NUMBER OF DAYS PC 4
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 54
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 4
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 6 FOG W/VIS <= 1/4 MILE 1
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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