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Ontario Weather March

To help you choose the best time to travel, you can find climate data below on the weather in Ontario in March.

Ontario Weather March:Niagara FallsToronto
day temperatureaverage daily high+5.9°C+4.7°C
night temperatureaverage daily low-3.5°C-1.9°C
sea temperaturesea temperature+2°C
Daylight hoursdaylight hours12.5h12.5h
sunny hours per daysunny/overcast hours5.2/7.3h
average monthly precipitationaverage monthly precipitation62 mm54 mm

Best places in Ontario

Temperature in Ontario

The average daily maximum in March is +5.9 — +4.7°C, and the minimum -3.5 — -1.9°C.

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Best places in Ontario:


Niagara Falls



Blue Mountain

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Sea temperature

The average monthly temperature in Lake Ontario on the beaches of Toronto in March is +2 degrees.

The water is very cold and only suitable to bathe in shortly for the most hardy people.

Ontario climate by month


The normal amount of precipitation for March is from 54 to 62 mm, which may cause a change of plans on certain days.