Climatological Report (Monthly)
Issued by NWS
Issued by NWS
274
CXUS55 KTFX 011534
CLMHLN
CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
934 AM MDT TUE OCT 01 2024
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...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1866 TO 2024
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 95 09/01 77 18 92 09/02
LOWEST 37 09/21 36 1 36 09/28
09/30
AVG. MAXIMUM 78.7 73.3 5.4 75.3
AVG. MINIMUM 49.9 44.6 5.3 48.5
MEAN 64.3 58.9 5.4 61.9
DAYS MAX >= 90 5 1.8 3.2 1
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 1.23 0.96 0.27 2.70
DAYS >= .01 7 5.8 1.2
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 0.72 09/11 TO 09/12
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 83 210 -127 121
SINCE 7/1 95 273 -178 MM
COOLING TOTAL 72 28 44 36
SINCE 1/1 590 433 157 MM
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WIND (MPH)
AVERAGE WIND SPEED 6.5
HIGHEST WIND SPEED/DIRECTION 41/260 DATE 09/11
HIGHEST GUST SPEED/DIRECTION 55/260 DATE 09/11
SKY COVER
AVERAGE SKY COVER 0.20
AVERAGE RH (PERCENT) 51
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 2 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 4
LIGHT RAIN 7 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 4 FOG W/VIS <= 1/4 MILE 0
HAZE 5
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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