Early autumn · Weather & things to do
Duluth in September
Duluth cools off: highs slip to 69°F (20°C), from 77°F in August, with lows of 51°F (11°C) and about 3.2 in (82 mm) of rain.
At 86/100 for comfort (the top score of the year), it's one of the best months to visit.
- Avg high
- 69°F (20°C)
- Avg low
- 51°F (11°C)
- Rain
- 3.2 in (82 mm)
- Humidity
- 75%
- Cloud cover
- 56%
- Daylight
- ~12 h 19 min
- Comfort score
- 86/100 · Great
What September feels like
Expect mild afternoons around 69°F (20°C), good for long walks.
Nights cool to an average low of 51°F (11°C).
Showers are part of the month, adding up to about 3.2 in (82 mm).
Plan around September
September is one of Duluth's best months on the climate data.
- Last of the best-scoring months: by October, the score drops to 64/100.
- Comfort holds steady from August (85 → 86/100).
- September sits inside the Jun – Oct window our Minnesota North Shore route recommends.
What to pack for September
- A warm layer for eveningsnights drop to 51°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost picks involve some walking
What to do in Duluth in September
With conditions on your side, the picks below favor time outside.
Skyline Parkway
Ridge road above the city with overlooks of the harbor and lake.
Why now Our curated notes say it's best late Sept–early Oct.
Enger Tower
Five-story stone tower on a hill with a free climb and 360-degree harbor views.
Bent Paddle Brewing Co.
Popular Lincoln Park taproom of a Duluth craft brewery.
Glensheen Mansion
1908 lakefront estate with original furnishings and terraced gardens.
Why now September scores 86/100 for comfort, good conditions for being outside.
Vikre Distillery
Canal Park distillery making gins and aquavit with North Woods botanicals.
Nearby in September
- Grand Marais in September~106 mi · highs 68°F, 3.2 in rain · similar daytime temperatures, about as wet
- Minneapolis in September~137 mi · highs 73°F, 3.5 in rain · 3°C (5°F) warmer by day, about as wet
- Decorah in September~241 mi · highs 73°F, 4.0 in rain · 3°C (5°F) warmer by day, wetter
- Door County in September~266 mi · highs 69°F, 3.4 in rain · similar daytime temperatures, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~354 m to Duluth's ~200 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Duluth in September: quick answers
Is September a good time to visit Duluth?
Yes. On the climate data it's one of the best months, scoring 86/100. Expect highs of 69°F (20°C) and 3.2 in (82 mm) of rain. September is inside the Jun – Oct window our Minnesota North Shore route recommends.
How hot is Duluth in September?
Average highs are 69°F (20°C) and average lows 51°F (11°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Duluth in September?
Some: about 3.2 in (82 mm) of rain falls across September on average, the 5th-wettest month of the year. The annual total is about 30.8 in (782 mm).
What should I pack for Duluth in September?
Bring a warm layer for evenings (nights drop to 51°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most picks involve some walking).
Routes in season in September
- Minnesota North Shore Jun – Oct
Planning Duluth in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.