Cool
Average highs are around 19°C, so pack for cooler days.
September verdict
Duluth, Minnesota, United States in September
Weather score35Poor
Poor for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 6.4h per day, enough for a balanced month. Rainfall averages 96mm, so some wet days are possible.
September weather
Monthly averages
Temp
19°C
Rain
96mm
Sun
6.4h
Sea
14°C
Weather score
35
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 96mm, so some wet days are possible.
Some sun
Sunshine averages 6.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 14°C, so the water can feel cool.
Map
Weather map
Compare Duluth, Minnesota, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September19°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September96mm average rain
September is one of Duluth's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to March and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September6.4 hours average sun
September sits close to Duluth's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September14°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
September35 weather score
September scores below Duluth's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels in Duluth, Minnesota, United States
Marriott
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