Climatological Report (Monthly)
Issued by NWS Duluth, MN
Issued by NWS Duluth, MN
420
CXUS53 KDLH 040945
CLMDLH
CLIMATE REPORT
NATIONAL WEATHER SERVICE DULUTH MN
445 AM CDT SAT OCT 04 2025
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...THE DULUTH CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1870 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 97 09/03/2023
LOW 22 09/22/1974
09/26/1965
09/20/1962
HIGHEST 85 09/16 MM MM 86 09/16
LOWEST 36 09/06 MM MM 34 09/07
AVG. MAXIMUM 67.3 67.2 0.1 76.2
AVG. MINIMUM 50.9 47.3 3.6 52.5
MEAN 59.1 57.2 1.9 64.3
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 1.1 -1.1 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 11.52 1881
MINIMUM 0.19 1952
TOTALS 2.53 3.48 -0.95 0.31
DAILY AVG. 0.08 0.12 -0.04 0.01
DAYS >= .01 10 11.6 -1.6 4
DAYS >= .10 7 6.7 0.3 1
DAYS >= .50 1 2.0 -1.0 0
DAYS >= 1.00 0 0.8 -0.8 0
GREATEST
24 HR. TOTAL 0.83 09/02 TO 09/02
SNOWFALL (INCHES)
RECORDS
TOTAL 2.4 1991
TOTALS 0.0 0.1 -0.1 0.0
SINCE 7/1 0.0 0.1 -0.1 MM
SNOWDEPTH AVG. 0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0 MM
24 HR TOTAL 0.0
DEGREE DAYS
HEATING TOTAL 185 254 -69 81
SINCE 7/1 305 366 -61 MM
COOLING TOTAL 15 21 -6 70
SINCE 1/1 235 254 -19 MM
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WIND (MPH)
AVERAGE WIND SPEED 8.9
HIGHEST WIND SPEED/DIRECTION 26/290 DATE 09/05
HIGHEST GUST SPEED/DIRECTION 38/280 DATE 09/05
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.53
NUMBER OF DAYS FAIR 10
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 12
AVERAGE RH (PERCENT) 80
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 5
LIGHT RAIN 15 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 20 FOG W/VIS <= 1/4 MILE 13
HAZE 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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