Ontario weather in March 2025

Expect 4°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Ontario in March. Check more long-term weather averages for Ontario in March before you book your next holiday to Ontario in 2025/2026.

  • 4°C maximum daytime temperature in March in Ontario (Toronto)4
    4°C max day temperature
  • 5 hours of sunshine per day
  • 10 days with some rainfall in March in Ontario (Toronto)10
    10 days with some rainfall
  • -4°C minimum night-time temperature in March in Ontario (Toronto)-4
    -4°C min night temperature
  • 12 hours of daylight per day in March in Ontario (Toronto)12
    12 hours of daylight per day
  • No heat & humidity in March in Ontario (Toronto)0
    No heat & humidity
  • 60 mm monthly rainfall in March in Ontario (Toronto)60
    60 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in March in Ontario (Toronto)3
    3 (Moderate) UV index
  • 2°C sea temperature in March in Ontario (Toronto)2
    2°C sea temperature

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The March weather guide for Ontario (Toronto) 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.

Top Ontario destinations

Below are average maximum temperatures at popular countries, regions and places in Ontario in March. Select a holiday destination to see more weather parameters.

All Ontario destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Canada

How cold is it in Ontario in March?

Daytime temperatures usually reach 4°C in Toronto, Ontario in March, falling to -4°C at night.

How sunny is it in Ontario in March?

There are normally 5 hours of bright sunshine each day in Toronto, Ontario in March - that's 40% of daylight hours.

Is the sea cold around Ontario in March?

The average sea temperature around Toronto, Ontario in March is 2°C.

Does it rain in Ontario in March?

There are usually 10 days with some rain in Toronto, Ontario in March and the average monthly rainfall is 60mm. Rain may fall as snow in this month.

Ontario March sunrise & sunset times

Browse the sunrise and sunset times for Ontario in March 2025. Select a month to view Ontario sunrise and sunset times for the next 12 months. The Ontario sunrise and sunset times shown below are for Toronto.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st March 2025 06:54 18:07
Sunday, 16th March 2025 06:27 18:25
Monday, 31st March 2025 06:00 18:44

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