Places › Portland, ME › September

Portland in September

One of the best months — score 93 of 100

Typical September days in Portland reach about 71°F with nights near 52°F.

What to pack for Portland in September

• A light jacket or fleece for evenings.
• Layers — afternoons run about 19° warmer than mornings.
• A compact rain layer — about 9 days see rain in a typical September.

Every packing line is triggered by a number on this page — the rules are on How we pick.

September vs. the alternatives

The whole year in Portland

Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.