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Duluth weather in September 2025
Expect 19°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Duluth in September. Check more long-term weather averages for Duluth in September before you book your next holiday to Minnesota in 2025/2026.
- 1919°C max day temperature
- 7 hours of sunshine per day
- 1212 days with some rainfall
- 88°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 9696 mm of monthly rainfall
- 55 (Moderate) UV index
- 1414°C sea temperature
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The September weather guide for Minnesota (Duluth) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Duluth in September?
Daytime temperatures usually reach 19°C in Duluth in September, falling to 8°C at night.
How sunny is it in Duluth in September?
There are normally 7 hours of bright sunshine each day in Duluth in September - that's 52% of daylight hours.
How warm is the sea around Duluth in September?
The average sea temperature around Duluth in September is 14°C.
Does it rain in Duluth in September?
There are usually 12 days with some rain in Duluth in September and the average monthly rainfall is 96mm.
Duluth September sunrise & sunset times
Browse the sunrise and sunset times for Duluth in September 2025. Select a month to view Duluth sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:29 | 18:47 |
Monday, 15th September 2025 | 05:47 | 18:19 |
Tuesday, 30th September 2025 | 06:06 | 17:49 |
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