Southwest Harbor weather in September (Maine, United States of America)
Planning a trip to Southwest Harbor in September? This guide provides all the details you need.
In Southwest Harbor the weather in September is generally perfect, characterized by pleasant temperatures and moderate rainfall. September is a summer month. Anticipate daytime temperatures around 20°C, while night temperatures can drop to 11°C.
Southwest Harbor in September usually receives moderate rainfall, averaging around 94 mm for the month. Based on our climate data of the past 30 years, about 10 days of rain are anticipated.
If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Southwest Harbor. July, August and September typically offer the best circumstances. While January, February, March, April, November and December tend to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Southwest Harbor climate page with graphs.
Southwest Harbor, monthly averages in September
Min Temperature
11°C
Max Temperature
20°C
Chance of Rain
34%
Precipitation
94 mm
Rainy days
10 days
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Southwest Harbor in September?
For visitors traveling to Southwest Harbor, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Southwest Harbor.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
