Maine weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Maine in September. Check more long-term weather averages for Maine in September before you book your next holiday to Maine in 2025/2026.

  • 21°C maximum daytime temperature in September in Maine (Augusta)21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Maine (Augusta)10
    10 days with some rainfall
  • 9°C minimum night-time temperature in September in Maine (Augusta)9
    9°C min night temperature
  • 12 hours of daylight per day in September in Maine (Augusta)12
    12 hours of daylight per day
  • No heat & humidity in September in Maine (Augusta)0
    No heat & humidity
  • 81 mm monthly rainfall in September in Maine (Augusta)81
    81 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Maine (Augusta)5
    5 (Moderate) UV index

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The September weather guide for Maine (Augusta) 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.

Top Maine destinations

Below are average maximum temperatures at popular countries, regions and places in Maine in September. Select a holiday destination to see more weather parameters.

All Maine destinations

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

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More about the USA

How hot is it in Maine in September?

Daytime temperatures usually reach 21°C in Augusta, Maine in September, falling to 9°C at night.

How sunny is it in Maine in September?

There are normally 7 hours of bright sunshine each day in Augusta, Maine in September - that's 54% of daylight hours.

Does it rain in Maine in September?

There are usually 10 days with some rain in Augusta, Maine in September and the average monthly rainfall is 81mm.

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

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

Maine September sunrise & sunset times

Browse the sunrise and sunset times for Maine in September 2025. Select a month to view Maine sunrise and sunset times for the next 12 months. The Maine sunrise and sunset times shown below are for Augusta.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:02 18:15
Monday, 15th September 2025 05:18 17:49
Tuesday, 30th September 2025 05:36 17:21

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