428
CXUS55 KMSO 012228
CLMBTM
CLIMATE REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
428 PM MDT THU OCT 01 2026
...............................
..THE BUTTE MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026
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 96 09/03/2022
LOW 3 09/24/1926
HIGHEST 80 09/25 MM MM 88
LOWEST 27 09/15 MM MM 29
09/27
AVG. MAXIMUM 69.1 69.1 -0.0 74.2
AVG. MINIMUM 38.9 36.5 2.4 39.2
MEAN 54.0 52.8 1.2 56.7
DAYS MAX >= 90 0 0.3 -0.3 0
DAYS MAX <= 32 0 0.1 -0.1 0
DAYS MIN <= 32 5 8.7 -3.7 2
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.54 1947
MINIMUM 0.00 1904
TOTALS 0.94 1.07 -0.13 0.59
DAILY AVG. 0.03 0.04 -0.01 0.02
DAYS >= .01 7 6.9 0.1 8
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 0.43 09/18 TO 09/19 0.14
DEGREE DAYS
HEATING TOTAL 324 368 -44
SINCE 7/1 422 583 -161
COOLING TOTAL 0 2 -2
SINCE 1/1 146 83 63
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WIND (MPH)
AVERAGE WIND SPEED 5.7
HIGHEST WIND SPEED/DIRECTION 37/240 DATE 09/02
HIGHEST GUST SPEED/DIRECTION 73/230 DATE 09/02
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.28
NUMBER OF DAYS FAIR 19
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 59
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 5 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 3
LIGHT RAIN 13 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 0
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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