Weather in Toronto, Ontario

Toronto's location on the Great Lakes has a major influence on its climate, and ensures that it is both warmer in the winter and cooler in the summer than it might otherwise be.

That's not to say that Toronto's winters aren't still severe, however. Snow cover is fairly constant between December and March, and temperatures are icy. During the summer months, surprisingly, Toronto becomes rather humid and sticky, which is an unpleasant surprise for many visitors who are expecting a cooler city.

The warm season lasts from May 27 to September 12 with an average daily high temperature above 22°C. The hottest day of the year is July 26, with an average high of 27°C and low of 19°C.

The cold season lasts from November 28 to March 9 with an average daily high temperature below 5°C. The coldest day of the year is February 3, with an average low of -6°C and high of -1°C.

The best time to visit Toronto depends on what you want from your visit. Each of the seasons has its distinct appeal in this city.

For many travellers, autumn is a preferred time to visit, as you can avoid the crowds and the oppressive heat of the summer while still enjoying a wide variety of events and festivals. Autumn skies are often clear and the city's parks are a riot of autumn colour.

Autumn temperatures range from around 21°C in September to 7oc in November, with overnight temperatures at 13°C in September but down to 2°C in November. Fog is likely on some days from Lake Ontario, and grey drizzle occurs on around 10 days each month, but for the majority of the time this is a beautiful season.

Winter in Toronto is bitterly cold by most standards, but not quite as cold as elsewhere in Canada. Daytime highs fall to -1°C in January, while overnight temperatures throughout the winter can average -3 to -6. If that sounds do-able, you're right - but the record low was -32°C, so be prepared for it to be potentially a lot worse than those average figures show.

Spring brings the city back to life after its winter in the deep freeze, and this is an excellent season to enjoy Toronto's parks and sporting fixtures. The average overnight temperature creeps slowly above freezing by April, and by the end of May you can expect daytime temperatures of around 18°C.

Although the average temperatures in June, July and August are a pleasant 25°C or so, the thermometer can creep above 40°C, and heat waves are quite common. Take a hat and plenty of sunscreen, as well as sunglasses. An umbrella would be useful too, as you can still expect a few inches of rain each month throughout the summer.

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