Early autumn · Weather & things to do
Grand Marais in September
Grand Marais cools off: highs slip to 68°F (20°C), from 77°F in August, with lows of 50°F (10°C) and about 3.2 in (81 mm) of rain.
At 83/100 for comfort (2nd of 12), it's one of the best months to visit.
- Avg high
- 68°F (20°C)
- Avg low
- 50°F (10°C)
- Rain
- 3.2 in (81 mm)
- Humidity
- 76%
- Cloud cover
- 65%
- Daylight
- ~12 h 20 min
- Comfort score
- 83/100 · Great
What September feels like
Days are mild at around 68°F (20°C): comfortable for walking all day, with a layer for the evening.
Nights cool to an average low of 50°F (10°C).
Showers are part of the month, adding up to about 3.2 in (81 mm).
Plan around September
September is one of Grand Marais's best months on the climate data.
- Last of the best-scoring months: by October, the score drops to 61/100.
- Comfort holds steady from August (83 → 83/100).
- September sits inside the Jun – Oct window our Minnesota North Shore route recommends.
What to pack for September
- A warm layer for eveningslows near 50°F
- Packable rain jacket or umbrellaabout 3.2 in of rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Grand Marais in September
September is good outdoor weather here, so these picks lean toward the open air.
Lutsen Mountains Summit Express Gondola
Gondola ride over the Poplar River valley to Moose Mountain's lake views.
Why now Our curated notes say it's best late Sept–early Oct.
Gunflint Trail
57-mile road from town into Boundary Waters lake country, with moose sightings at dusk.
Why now Our curated notes say it's best late Sept fall color.
World's Best Donuts
Seasonal donut shop near the harbor since 1969.
Why now Our curated notes say it's best early morning, May–Oct.
Artist's Point
Rocky basalt spit behind the Coast Guard station leading to the harbor lighthouse breakwall.
Why now September scores 83/100 for comfort, good conditions for being outside.
Judge C.R. Magney State Park
Trail to the Devil's Kettle, where half the Brule River seems to vanish into a pothole.
Why now Highs near 68°F and 3.2 in of monthly rain make this an easy outdoor pick.
Nearby in September
- Duluth in September~106 mi · highs 69°F, 3.2 in rain · similar daytime temperatures, about as wet
- Minneapolis in September~237 mi · highs 73°F, 3.5 in rain · 3°C (5°F) warmer by day, about as wet
- Door County in September~242 mi · highs 69°F, 3.4 in rain · similar daytime temperatures, about as wet
- Sleeping Bear Dunes in September~290 mi · highs 65°F, 3.4 in rain · 2°C (4°F) cooler by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~468 m to Grand Marais's ~186 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.
Grand Marais in September: quick answers
Is September a good time to visit Grand Marais?
Yes. On the climate data it's one of the best months, scoring 83/100. Expect highs of 68°F (20°C) and 3.2 in (81 mm) of rain. September is inside the Jun – Oct window our Minnesota North Shore route recommends.
How hot is Grand Marais in September?
Average highs are 68°F (20°C) and average lows 50°F (10°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Grand Marais in September?
Some: about 3.2 in (81 mm) of rain falls across September on average, the 4th-wettest month of the year. The annual total is about 28.5 in (723 mm).
What should I pack for Grand Marais in September?
Bring a warm layer for evenings (lows near 50°F), packable rain jacket or umbrella (about 3.2 in of rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Grand Marais
Routes in season in September
- Minnesota North Shore Jun – Oct
Planning Grand Marais in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.