Hamilton weather in October 2025

Expect 57°F 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.

  • 57°F maximum daytime temperature in October in Hamilton57
    57°F max day temperature
  • 5 hours of sunshine per day
  • 11 days with some rainfall in October in Hamilton11
    11 days with some rainfall
  • 41°F minimum night-time temperature in October in Hamilton41
    41°F 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
  • 2.8 inches monthly rainfall in October in Hamilton2.8
    2.8 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Hamilton3
    3 (Moderate) UV index
  • 57°F sea temperature in October in Hamilton57
    57°F 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)  |  Imperial (°F)

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How warm is it in Hamilton in October?

Daytime temperatures usually reach 57°F in Hamilton in October, falling to 41°F 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 57°F.

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 2.8 inches.

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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