622
CXUS55 KTFX 010812
CLMGTF

CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
212 AM MDT MON JUN 01 2026

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

...THE GREAT FALLS MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2026...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1886 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH            100   05/28/1919
 LOW              12   05/01/2009
HIGHEST           89   05/13         70      19       90
LOWEST            23   05/06         37     -14       28
AVG. MAXIMUM    69.1               64.6     4.5     69.5
AVG. MINIMUM    40.3               38.4     1.9     41.1
MEAN            54.7               51.5     3.2     55.3
DAYS MAX >= 90     0                0.1    -0.1
DAYS MAX <= 32     0                0.0     0.0
DAYS MIN <= 32     3                6.0    -3.0
DAYS MIN <= 0      0                0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.13   1953
 MINIMUM        0.21
TOTALS          3.43               2.43    1.00     2.54
DAYS >= .01       10               11.3    -1.3
DAYS >= .10        7                6.1     0.9
DAYS >= .50        2                1.2     0.8
DAYS >= 1.00       2                0.3     1.7
GREATEST
 24 HR. TOTAL   2.29   05/30 TO 05/31

SNOWFALL (INCHES)
RECORDS
 TOTAL          11.6   1989
 24 HR TOTAL    11.6   05/28/1989 TO 05/29/1989
TOTALS           0.1                1.9    -1.8        T
SINCE 7/1       41.7               65.8   -24.1       MM
SNOWDEPTH AVG.     0
DAYS >= TRACE      2                1.4     0.6
DAYS >= 1.0        0                0.6    -0.6
GREATEST
 SNOW DEPTH        0
 24 HR TOTAL      MM

DEGREE DAYS
HEATING TOTAL    332                422     -90      309
 SINCE 7/1      6011               7526   -1515       MM
COOLING TOTAL     19                  3      16       14
 SINCE 1/1        20                  3      17       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.8
HIGHEST WIND SPEED/DIRECTION    51/230    DATE  05/13
HIGHEST GUST SPEED/DIRECTION    69/230    DATE  05/13

SKY COVER
AVERAGE SKY COVER           0.35

AVERAGE RH (PERCENT)     55

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       7
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                2     SLEET                      0
FOG                       7     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

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

$$