Bangor weather in September 2025

Expect 20°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Bangor in September. Check more long-term weather averages for Bangor in September before you book your next holiday to Maine in 2025/2026.

  • 20°C maximum daytime temperature in September in Bangor20
    20°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in September in Bangor10
    10 days with some rainfall
  • 9°C minimum night-time temperature in September in Bangor9
    9°C min night temperature
  • 12 hours of daylight per day in September in Bangor12
    12 hours of daylight per day
  • No heat & humidity in September in Bangor0
    No heat & humidity
  • 90 mm monthly rainfall in September in Bangor90
    90 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Bangor5
    5 (Moderate) UV index

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The September weather guide for Maine (Bangor) 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)

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More about the USA

How hot is it in Bangor in September?

Daytime temperatures usually reach 20°C in Bangor in September, falling to 9°C at night.

How sunny is it in Bangor in September?

There are normally 6 hours of bright sunshine each day in Bangor in September - that's 50% of daylight hours.

Does it rain in Bangor in September?

There are usually 10 days with some rain in Bangor in September and the average monthly rainfall is 90mm.

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

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

Bangor September sunrise & sunset times

Browse the sunrise and sunset times for Bangor in September 2025. Select a month to view Bangor sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 04:58 18:11
Monday, 15th September 2025 05:14 17:45
Tuesday, 30th September 2025 05:32 17:17

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