Climatological Report (Monthly)
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CXUS55 KTFX 010857
CLMHLN

CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
157 AM MST MON JAN 01 2024

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

...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1866 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             70   12/01/2021
 LOW             -40   12/30/1880
HIGHEST           64   12/05         35      29       53  12/27
LOWEST             5   12/26          9      -4      -35  12/22
AVG. MAXIMUM    41.6               32.6     9.0     27.7
AVG. MINIMUM    22.4               14.2     8.2      8.8
MEAN            32.0               23.4     8.6     18.2
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     6               13.2    -7.2       16
DAYS MIN <= 32    28               29.7    -1.7       29
DAYS MIN <= 0      0                4.5    -4.5        6

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.64   1880
 MINIMUM           T
TOTALS          0.03               0.46   -0.43     0.69
DAYS >= .01        1                6.6    -5.6
DAYS >= .10        0                1.6    -1.6
DAYS >= .50        0                0.0     0.0
DAYS >= 1.00       0                0.0     0.0
GREATEST
 24 HR. TOTAL   0.03   12/11 TO 12/11

SNOWFALL (INCHES)
RECORDS
 TOTAL         102.8   1929
 24 HR TOTAL    18.0   12/09/1906 TO 12/09/1906
TOTALS           0.6                7.7    -7.1     10.7
SINCE 7/1       14.5               16.4    -1.9
SNOWDEPTH AVG.     T
DAYS >= TRACE      5                5.2    -0.2
DAYS >= 1.0        0                2.2    -2.2
GREATEST
 SNOW DEPTH       MM
 24 HR TOTAL     0.5   12/23 TO 12/23

DEGREE DAYS
HEATING TOTAL   1013               1290    -277     1443
 SINCE 7/1      2574               3130    -556       MM
COOLING TOTAL      0                  0       0        0
 SINCE 1/1       588                433     155       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              3.9
HIGHEST WIND SPEED/DIRECTION    30/250    DATE  12/02
HIGHEST GUST SPEED/DIRECTION    42/270    DATE  12/02

SKY COVER
AVERAGE SKY COVER           0.37

AVERAGE RH (PERCENT)     65

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                5     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      5
HAZE                      8

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

$$


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