Portland weather in September (Maine, United States of America)
How is the weather in Portland in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.
In September, Portland generally has pleasant temperatures and high rainfall. Throughout the day, temperatures typically settle at around 22°C. But by evening, they drop to around 12°C.
Portland in September usually receives high rainfall, averaging around 103 mm for the month. Rain is expected on roughly 10 days.
The days are predominantly sunny, with an estimated total of around 228 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.
If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Portland. June, 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 Portland climate page with graphs.
Portland, monthly averages in September
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.
So, what should you wear in Portland in September?
For visitors traveling to Portland, 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. With a water temperature of around 16°C there is no need to bring your swimwear.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 Portland.
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.