Climatological Report (Monthly)
Issued by NWS
Issued by NWS
656
CXUS55 KTFX 011530
CLMHLN
CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
930 AM MDT SAT JUN 01 2024
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...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2024...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1866 TO 2024
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 85 05/28 70 15 87 05/21
LOWEST 29 05/04 36 -7 36 05/10
AVG. MAXIMUM 64.8 66.4 -1.6 73.0
AVG. MINIMUM 41.1 41.5 -0.4 48.1
MEAN 53.0 53.9 -0.9 60.5
DAYS MAX >= 90 0 0.3 -0.3 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 3 3.4 -0.4 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 6.67 1927
MINIMUM 0.24
TOTALS 1.69 1.95 -0.26 1.21
DAYS >= .01 8 11.2 -3.2
DAYS >= .10 3 5.3 -2.3
DAYS >= .50 1 1.1 -0.1
DAYS >= 1.00 0 0.1 -0.1
GREATEST
24 HR. TOTAL 1.01 05/07 TO 05/08
SNOWFALL (INCHES)
RECORDS
TOTAL 13.9 1927
24 HR TOTAL 12.5 05/10/1967 TO 05/10/1967
TOTALS 0.5 0.1 0.4 0.0
SINCE 7/1 57.9 37.2 20.7
SNOWDEPTH AVG. T
DAYS >= TRACE 1 0.2 0.8
DAYS >= 1.0 0 0.0 0.0
GREATEST
SNOW DEPTH T 05/29
05/30
05/08
24 HR TOTAL MM
DEGREE DAYS
HEATING TOTAL 364 350 14 147
SINCE 7/1 6775 7357 -582 MM
COOLING TOTAL 0 7 -7 15
SINCE 1/1 0 7 -7 MM
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WIND (MPH)
AVERAGE WIND SPEED 9.5
HIGHEST WIND SPEED/DIRECTION 40/270 DATE 05/17
HIGHEST GUST SPEED/DIRECTION 62/290 DATE 05/17
SKY COVER
AVERAGE SKY COVER 0.41
AVERAGE RH (PERCENT) 49
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 1
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 15 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 1 SLEET 0
FOG 3 FOG W/VIS <= 1/4 MILE 1
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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