827
CXUS55 KMSO 052159
CLMBTM
CLIMATE REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
259 PM MST MON JAN 05 2026
...............................
..THE BUTTE MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1895 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 66 12/27/1917
LOW -52 12/23/1983
HIGHEST 59 12/14 MM MM 54
LOWEST 12/28 MM MM 4
AVG. MAXIMUM 41.3 30.7 10.6 39.5
AVG. MINIMUM 21.8 7.2 14.6 17.4
MEAN 31.6 19.0 12.6 28.5
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 4 16.8 -12.8 5
DAYS MIN <= 32 27 30.5 -3.5 31
DAYS MIN <= 0 1 9.6 -8.6 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 1.99 1996
MINIMUM 0.02 1918
TOTALS 0.82 0.48 0.34 0.24
DAILY AVG. 0.03 0.02 0.01 0.01
DAYS >= .01 10 7.2 2.8 6
DAYS >= .10 2 1.3 0.7 0
DAYS >= .50 0 0.1 -0.1 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.39 12/17 TO 12/17 0.10
DEGREE DAYS
HEATING TOTAL 1028 1427 -399
SINCE 7/1 2899 3882 -983
COOLING TOTAL 0 0 0
SINCE 1/1 60 83 -23
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WIND (MPH)
AVERAGE WIND SPEED 6.3
HIGHEST WIND SPEED/DIRECTION 43/290 DATE 12/17
HIGHEST GUST SPEED/DIRECTION 74/280 DATE 12/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.53
NUMBER OF DAYS FAIR 9
NUMBER OF DAYS PC 14
NUMBER OF DAYS CLOUDY 8
AVERAGE RH (PERCENT) 67
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 1 HAIL 0
HEAVY SNOW 1 SNOW 2
LIGHT SNOW 11 SLEET 0
FOG 10 FOG W/VIS <= 1/4 MILE 3
HAZE 6
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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