624
CXUS55 KTFX 010812
CLMHLN
CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
212 AM MDT MON JUN 01 2026
...............................
..THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF MAY 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
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TEMPERATURE (F)
RECORD
HIGH 95 05/28/1919
LOW 17 05/02/1954
HIGHEST 90 05/28 70 20 91 05/31
LOWEST 27 05/06 36 -9 34 05/06
AVG. MAXIMUM 69.5 66.4 3.1 70.9
AVG. MINIMUM 42.0 41.5 0.5 43.8
MEAN 55.7 53.9 1.8 57.4
DAYS MAX >= 90 1 0.3 0.7 1
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 4 3.4 0.6 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 6.67 1927
MINIMUM 0.24
TOTALS 1.82 1.95 -0.13 3.64
DAYS >= .01 10 11.2 -1.2
DAYS >= .10 5 5.3 -0.3
DAYS >= .50 1 1.1 -0.1
DAYS >= 1.00 0 0.1 -0.1
GREATEST
24 HR. TOTAL 1.01 05/30 TO 05/31
SNOWFALL (INCHES)
RECORDS
TOTAL 13.9 1927
24 HR TOTAL 12.5 05/10/1967 TO 05/10/1967
TOTALS T 0.1 -0.1 0.0
SINCE 7/1 22.3 37.2 -14.9 MM
SNOWDEPTH AVG. 0
DAYS >= TRACE 1 0.2 0.8
DAYS >= 1.0 0 0.0 0.0
GREATEST
SNOW DEPTH 0
24 HR TOTAL MM
DEGREE DAYS
HEATING TOTAL 301 350 -49 256
SINCE 7/1 5893 7357 -1464 MM
COOLING TOTAL 20 7 13 25
SINCE 1/1 20 7 13 MM
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WIND (MPH)
AVERAGE WIND SPEED 8.1
HIGHEST WIND SPEED/DIRECTION 41/270 DATE 05/13
HIGHEST GUST SPEED/DIRECTION 56/270 DATE 05/13
SKY COVER
AVERAGE SKY COVER 0.31
AVERAGE RH (PERCENT) 50
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 6 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 6
LIGHT RAIN 13 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 1 SLEET 0
FOG 4 FOG W/VIS <= 1/4 MILE 0
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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