Portland weather in September 2024

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Portland in September. Check more long-term weather averages for Portland in September before you book your next holiday to Maine in 2024/2025.

21
21°C max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
10
10°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
81
81 mm of monthly rainfall
5
5 (Moderate) UV index
15
15°C sea temperature

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The September weather guide for Maine (Portland) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about the USA

How hot is it in Portland in September?

Daytime temperatures usually reach 21°C in Portland in September, falling to 10°C at night.

How sunny is it in Portland in September?

There are normally 7 hours of bright sunshine each day in Portland in September - that's 59% of daylight hours.

How warm is the sea around Portland in September?

The average sea temperature around Portland in September is 15°C.

Does it rain in Portland in September?

There are usually 9 days with some rain in Portland in September and the average monthly rainfall is 81mm.

What is the chance of a hurricane in Portland in September?

On average less than 1 day in September in Portland is likely to be affected by the passage of one or more tropical storms.

Portland September sunrise & sunset times

Browse the sunrise and sunset times for Portland in September 2024. Select a month to view Portland sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Sunday, 1st September 2024	06:05	19:16
Sunday, 15th September 2024	06:21	18:50
Monday, 30th September 2024	06:38	18:23

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Maine - quick facts
Flight time^✝	11 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Maine Office of Tourism