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
................................................................
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
................................................................

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.

$$