978
CXUS55 KTFX 010854
CLMHLN

CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
254 AM MDT WED OCT 01 2025

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...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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
................................................................
TEMPERATURE (F)
RECORD
 HIGH            102   09/07/2022
 LOW               6   09/24/1926
HIGHEST           92   09/03         77      15       95  09/01
LOWEST            36   09/23         36       0       37  09/21
                                                          09/30
AVG. MAXIMUM    78.8               73.3     5.5     78.7
AVG. MINIMUM    48.2               44.6     3.6     49.9
MEAN            63.5               58.9     4.6     64.3
DAYS MAX >= 90     3                1.8     1.2        5
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          0.60               0.96   -0.36     1.23
DAYS >= .01        5                5.8    -0.8
DAYS >= .10        1                2.7    -1.7
DAYS >= .50        0                0.6    -0.6
DAYS >= 1.00       0                0.1    -0.1
GREATEST
 24 HR. TOTAL   0.43   09/14 TO 09/14

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     72                210    -138       83
 SINCE 7/1        98                273    -175       MM
COOLING TOTAL     36                 28       8       72
 SINCE 1/1       467                433      34       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
HIGHEST WIND SPEED/DIRECTION    41/270    DATE  09/14
HIGHEST GUST SPEED/DIRECTION    56/270    DATE  09/14

SKY COVER
AVERAGE SKY COVER           0.14

AVERAGE RH (PERCENT)     50

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                9     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      1
HAZE                      6

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$