681
CXUS55 KTFX 010912
CLMHLN
CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
312 AM MDT THU OCT 01 2026
...............................
..THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1866 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 102 09/07/2022
LOW 6 09/24/1926
HIGHEST 87 09/10 77 10 92 09/03
LOWEST 34 09/27 36 -2 36 09/23
AVG. MAXIMUM 73.1 73.3 -0.2 78.8
AVG. MINIMUM 46.8 44.6 2.2 48.2
MEAN 59.9 58.9 1.0 63.5
DAYS MAX >= 90 0 1.8 -1.8 3
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 1.7 -1.7 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.66 1882
MINIMUM 0.00
TOTALS 1.38 0.96 0.42 0.60
DAYS >= .01 8 5.8 2.2
DAYS >= .10 4 2.7 1.3
DAYS >= .50 1 0.6 0.4
DAYS >= 1.00 0 0.1 -0.1
GREATEST
24 HR. TOTAL 0.65 09/18 TO 09/19
SNOWFALL (INCHES)
RECORDS
TOTAL 14.2 1925
24 HR TOTAL 13.3 09/17/1957 TO 09/18/1957
TOTALS 0.0 0.2 -0.2 0.0
SINCE 7/1 0.0 0.5 -0.5 MM
SNOWDEPTH AVG. 0
DAYS >= TRACE 0 0.0 0.0
DAYS >= 1.0 0 0.0 0.0
GREATEST
SNOW DEPTH 0
24 HR TOTAL MM
DEGREE DAYS
HEATING TOTAL 154 210 -56 72
SINCE 7/1 178 273 -95 MM
COOLING TOTAL 11 28 -17 36
SINCE 1/1 496 433 63 MM
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WIND (MPH)
AVERAGE WIND SPEED 6.6
HIGHEST WIND SPEED/DIRECTION 52/270 DATE 09/02
HIGHEST GUST SPEED/DIRECTION 71/270 DATE 09/02
SKY COVER
AVERAGE SKY COVER 0.24
AVERAGE RH (PERCENT) 56
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 3 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 5 FOG W/VIS <= 1/4 MILE 0
HAZE 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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