Get the monthly weather forecast for Portland, ME, including daily high/low, historical averages, to help you plan ahead.

September highs can reach 70 degrees, but once October hits, highs hover in the 50s before dipping to the 40s come early November. Lows stay in the 50s in ...

Temperature records began November 25, 1940. Portland, ME Daily Records for SEPTEMBER. High Temperatures. Record High. Record Cool High. Page 2. Date Record.

The weather in Portland in September is mildly cool and breezy, with average highs of 70°F (21°C) and lows of 56°F (13°C).

South Portland, ME 57°F Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities For Business September 2024

Daily high temperatures decrease by 10°F, from 73°F to 63°F, rarely falling below 55°F or exceeding 81°F.

September in Portland, Maine, typically experiences mild temperatures. The average temperature during this month is around 62.8°F (17.1°C).

Portland Weather in September, USA ; Temperature. 15°C ; High Temperature. 21°C ; Low Temperature. 10°C ; Rainfall Days. 12 days ; Rainfall. 140 mm ...

Rain early. Decreasing clouds overnight. Low 34F. Winds NW at 15 to 25 mph. Chance of rain 100%. Higher wind gusts possible. Record Low6°. Average Low28°.