Duluth weather in September
Mild and comfortable, with some rainy days. Average highs of 20°C and lows of 13°C, with around 11 rainy days expected throughout the month.
While September isn't our top-rated month for Duluth, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
20°C
Average low
13°C
Rainy days
11 days
Best months to visit
July, August
What to do in Duluth in September
Whatever the weather, Duluth rewards curious visitors. Here are some of the best ways to spend your time:
Aerial Lift Bridge observation: working ships and mechanism
Canal Park waterfront walk: ship watching and harbor views
Lake Superior Maritime Museum vessel tours
Jay Cooke State Park hiking: river gorge exploration
North Shore scenic drive: Gooseberry Falls and lighthouse visits
Superior hiking trail: long-distance backpacking option
What to pack for September
Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.
Browse other months
January
-6C
Cold, with occasional showers.
February
-6C
Cold, with occasional showers.
March
2C
Cold, with occasional showers.
April
7C
Cold, with some rainy days.
May
15C
Cool, with some rainy days.
June
21C
Mild and comfortable, with some rainy days.
Recommended
July
25C
Warm and pleasant, with some rainy days.
Recommended
August
24C
Mild and comfortable, with some rainy days.
September (you are here)
20C
Mild and comfortable, with some rainy days.
October
12C
Cool, with some rainy days.
November
4C
Cold, with occasional showers.
December
-2C
Cold, with occasional showers.
Book your September trip to Duluth
Find hotels, tours and experiences for the perfect escape.
