Boundary Waters weather in September
Mild and comfortable, with some rainy days. Average highs of 19°C and lows of 11°C, with around 12 rainy days expected throughout the month.
While September isn't our top-rated month for Boundary Waters, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
19°C
Average low
11°C
Rainy days
12 days
Best months to visit
July
What to do in Boundary Waters in September
Whatever the weather, Boundary Waters rewards curious visitors. Here are some of the best ways to spend your time:
Canoe expedition: 7-10 day backcountry journey
Moose spotting: dawn and dusk wildlife watching
Fishing for northerns and walleye game fish
Camping on island shores: nights under stars
Portaging between lakes: traditional paddling routes
Winter: cross-country skiing and ice fishing options
What to pack for September
Layer up — a mid-weight jacket, jumpers, and comfortable trousers. Waterproof shoes are recommended. Scarves and gloves may be useful in the evenings.
Browse other months
January
-9C
Cold, with occasional showers.
February
-9C
Cold, with occasional showers.
March
0C
Cold, with occasional showers.
April
6C
Cold, with some rainy days.
May
16C
Cool, with some rainy days.
June
22C
Mild and comfortable, with some rainy days.
Recommended
July
25C
Warm and pleasant, with some rainy days.
August
23C
Mild and comfortable, with some rainy days.
September (you are here)
19C
Mild and comfortable, with some rainy days.
October
10C
Cool, with some rainy days.
November
2C
Cold, with some rainy days.
December
-4C
Cold, with some rainy days.
Book your September trip to Boundary Waters
Find hotels, tours and experiences for the perfect escape.
