Early autumn · Weather & things to do
Maine in September
Maine cools off: highs slip to 72°F (22°C), from 78°F in August, with lows of 52°F (11°C) and about 3.5 in (89 mm) of rain.
September opens the best stretch on our comfort score, at 87/100 (the top score of the year).
- Avg high
- 72°F (22°C)
- Avg low
- 52°F (11°C)
- Rain
- 3.5 in (89 mm)
- Humidity
- 79%
- Cloud cover
- 52%
- Daylight
- ~12 h 17 min
- Comfort score
- 87/100 · Great
What September feels like
Warm afternoons near 72°F (22°C) make long days outdoors easy.
Lows average 52°F (11°C).
Showers are part of the month, adding up to about 3.5 in (89 mm).
Plan around September
September is one of Maine's best months on the climate data.
- Last warm month for a while: October highs fall to 58°F.
- Opens the best-scoring stretch on our comfort score: September.
- Comfort improves from 76/100 in August to 87/100.
- September sits inside the Sep – Oct window our New England Fall Foliage route recommends.
What to pack for September
- Light, breathable clothes72°F afternoons
- Packable rain jacket or umbrellaabout 3.5 in of rain
- Comfortable walking shoesmost picks involve some walking
What to do in Maine in September
September is good outdoor weather here, so these picks lean toward the open air.
Mount Battie
Camden Hills summit with a stone tower and views over Camden Harbor and Penobscot Bay.
Why now September scores 87/100 for comfort, good conditions for being outside.
Ocean Path
Easy 2-mile shoreline walk from Sand Beach past Thunder Hole to Otter Cliff.
Why now Highs near 72°F and 3.5 in of monthly rain make this an easy outdoor pick.
Red's Eats
Roadside shack in Wiscasset known for overstuffed lobster rolls since the 1970s.
Thurston's Lobster Pound
Dockside pound in Bernard: pick a lobster by weight and eat it on the deck over the harbor.
Bar Harbor Shore Path
Free waterfront walk past old cottages and Frenchman Bay islands from the town pier.
Why now One to do outside while the weather is on your side.
Nearby in September
- Portland, Maine in September~51 mi · highs 65°F, 3.8 in rain · 4°C (6°F) cooler by day, about as wet
- White Mountains in September~75 mi · highs 50°F, 3.6 in rain · 12°C (22°F) cooler by day, about as wet
- Portsmouth in September~99 mi · highs 69°F, 3.5 in rain · 2°C (3°F) cooler by day, about as wet
- New Hampshire in September~118 mi · highs 74°F, 3.7 in rain · 1°C (3°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Maine in September: quick answers
Is September a good time to visit Maine?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 72°F (22°C) and 3.5 in (89 mm) of rain. September is inside the Sep – Oct window our New England Fall Foliage route recommends.
How hot is Maine in September?
Average highs are 72°F (22°C) and average lows 52°F (11°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Maine in September?
Some: about 3.5 in (89 mm) of rain falls across September on average, the 4th-driest month of the year. The annual total is about 48.9 in (1241 mm).
What should I pack for Maine in September?
Bring light, breathable clothes (72°F afternoons), packable rain jacket or umbrella (about 3.5 in of rain) and comfortable walking shoes (most picks involve some walking).
Routes in season in September
- New England Fall Foliage Sep – Oct
Planning Maine in September?
Share this September plan with your group, poll everyone on dates and keep the packing list in one place.