St John weather in October 2025

Expect daytime maximum temperatures of 12°C in St John, New Brunswick in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 106 mm of rainfall in the month.

  • 12°C maximum daytime temperature in October in St John12
    12°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in October in St John12
    12 days with some rainfall
  • 5°C minimum night-time temperature in October in St John5
    5°C min night temperature
  • 11 hours of daylight per day in October in St John11
    11 hours of daylight per day
  • No heat & humidity in October in St John0
    No heat & humidity
  • 106 mm monthly rainfall in October in St John106
    106 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in St John3
    3 (Moderate) UV index
  • 11°C sea temperature in October in St John11
    11°C sea temperature

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The October weather guide for New Brunswick (St John) 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 St John in October?

Daytime temperatures usually reach 12°C in St John in October, falling to 5°C at night.

How sunny is it in St John in October?

There are normally 5 hours of bright sunshine each day in St John in October - that's 41% of daylight hours.

Is the sea cold around St John in October?

The average sea temperature around St John in October is 11°C.

Does it rain in St John in October?

There are usually 12 days with some rain in St John in October and the average monthly rainfall is 106mm.

St John October sunrise & sunset times

Browse the sunrise and sunset times for St John in October 2025. Select a month to view St John sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:23 18:04
Thursday, 16th October 2025 06:42 17:37
Friday, 31st October 2025 07:02 17:13

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