Ottawa weather in October 2026

Expect daytime maximum temperatures of 13°C in Ottawa, Ontario in October based on long-term weather averages. There are 4 hours of sunshine per day on average with 12 days with some rainfall and typically 71 mm of rainfall in the month.

  • 13°C maximum daytime temperature in October in Ottawa13
    13°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in October in Ottawa12
    12 days with some rainfall
  • 4°C minimum night-time temperature in October in Ottawa4
    4°C min night temperature
  • 11 hours of daylight per day in October in Ottawa11
    11 hours of daylight per day
  • No heat & humidity in October in Ottawa0
    No heat & humidity
  • 71 mm monthly rainfall in October in Ottawa71
    71 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Ottawa3
    3 (Moderate) UV index

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The October weather guide for Ontario (Ottawa) 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 Ontario

How warm is it in Ottawa in October?

Daytime temperatures usually reach 14°C in Ottawa in October, falling to 6°C at night.

How sunny is it in Ottawa in October?

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

How warm is the sea around Ottawa in October?

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

Does it rain in Ottawa in October?

There are usually 11 days with some rain in Ottawa in October and the average monthly rainfall is 63mm.

Ottawa October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st October 2026 06:01 17:43
Friday, 16th October 2026 06:20 17:15
Saturday, 31st October 2026 06:41 16:51

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