Climatological Report (Monthly)
Issued by NWS
Issued by NWS
783
CXUS55 KTFX 011621
CLMHLN
CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
921 AM MST THU JAN 01 2026
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...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1866 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 70 12/01/2021
LOW -40 12/30/1880
HIGHEST 61 12/10 35 26 58 12/07
LOWEST -6 12/28 9 -15 17 12/03
AVG. MAXIMUM 44.1 32.6 11.5 44.2
AVG. MINIMUM 23.9 14.2 9.7 26.2
MEAN 34.0 23.4 10.6 35.2
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 3 13.2 -10.2 2
DAYS MIN <= 32 23 29.7 -6.7 30
DAYS MIN <= 0 2 4.5 -2.5 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.64 1880
MINIMUM T
TOTALS 0.86 0.46 0.40 0.30
DAYS >= .01 14 6.6 7.4
DAYS >= .10 2 1.6 0.4
DAYS >= .50 0 0.0 0.0
DAYS >= 1.00 0 0.0 0.0
GREATEST
24 HR. TOTAL 0.27 12/11 TO 12/12
SNOWFALL (INCHES)
RECORDS
TOTAL 102.8 1929
24 HR TOTAL 18.0 12/09/1906 TO 12/09/1906
TOTALS 3.4 7.7 -4.3 2.0
SINCE 7/1 10.6 16.4 -5.8 MM
SNOWDEPTH AVG. 0
DAYS >= TRACE 8 5.2 2.8
DAYS >= 1.0 2 2.2 -0.2
GREATEST
SNOW DEPTH 2 12/02
12/03
12/13
24 HR TOTAL MM
DEGREE DAYS
HEATING TOTAL 954 1290 -336 917
SINCE 7/1 2426 3130 -704 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 467 433 34 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.7
HIGHEST WIND SPEED/DIRECTION 56/260 DATE 12/17
HIGHEST GUST SPEED/DIRECTION 91/260 DATE 12/17
SKY COVER
AVERAGE SKY COVER 0.45
AVERAGE RH (PERCENT) 66
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 3 HAIL 0
HEAVY SNOW 1 SNOW 1
LIGHT SNOW 6 SLEET 0
FOG 8 FOG W/VIS <= 1/4 MILE 3
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$