Hamilton weather in October 2025

Expect 14°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Hamilton in October. Check more long-term weather averages for Hamilton in October before you book your next holiday to Ontario in 2025/2026.

  • 14°C maximum daytime temperature in October in Hamilton14
    14°C max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in October in Hamilton11
    11 days with some rainfall
  • 5°C minimum night-time temperature in October in Hamilton5
    5°C min night temperature
  • 11 hours of daylight per day in October in Hamilton11
    11 hours of daylight per day
  • No heat & humidity in October in Hamilton0
    No heat & humidity
  • 70 mm monthly rainfall in October in Hamilton70
    70 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Hamilton3
    3 (Moderate) UV index
  • 14°C sea temperature in October in Hamilton14
    14°C sea temperature

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The October weather guide for Ontario (Hamilton) 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 Hamilton in October?

Daytime temperatures usually reach 14°C in Hamilton in October, falling to 5°C at night.

How sunny is it in Hamilton in October?

There are normally 5 hours of bright sunshine each day in Hamilton in October - that's 42% of daylight hours.

How warm is the sea around Hamilton in October?

The average sea temperature around Hamilton in October is 14°C.

Does it rain in Hamilton in October?

There are usually 11 days with some rain in Hamilton in October and the average monthly rainfall is 70mm.

Hamilton October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:17 18:00
Thursday, 16th October 2025 06:35 17:34
Friday, 31st October 2025 06:54 17:12

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