Portland weather in October 2026

Expect daytime maximum temperatures of 15°C in Portland, Maine in October based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 100 mm of rainfall in the month.

  • 15°C maximum daytime temperature in October in Portland15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in October in Portland10
    10 days with some rainfall
  • 4°C minimum night-time temperature in October in Portland4
    4°C min night temperature
  • 11 hours of daylight per day in October in Portland11
    11 hours of daylight per day
  • No heat & humidity in October in Portland0
    No heat & humidity
  • 100 mm monthly rainfall in October in Portland100
    100 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Portland3
    3 (Moderate) UV index
  • 12°C sea temperature in October in Portland12
    12°C sea temperature

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The October 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)

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How warm is it in Portland in October?

Daytime temperatures usually reach 15°C in Portland in October, falling to 3°C at night.

How sunny is it in Portland in October?

There are normally 5 hours of bright sunshine each day in Portland in October - that's 49% of daylight hours.

Does it rain in Portland in October?

There are usually 11 days with some rain in Portland in October and the average monthly rainfall is 96mm.

Portland October sunrise & sunset times

Browse the sunrise and sunset times for Portland in October 2026. Select a month to view Portland sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st October 2026 05:39 17:22
Friday, 16th October 2026 05:57 16:56
Saturday, 31st October 2026 06:16 16:33

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