The weather in Toronto last week and into the weekend was confusing, to say the least. Did you leave your jacket at home, swap it for a T-shirt, or grab an umbrella?
Over this time, the temperature graph of southern Ontario looked like a rollercoaster — up, down, up, down — and unfortunately, that trend is expected to continue this week.
This past weekend started off with an unseasonably warm and thunderous spell. Saturday night saw some southern Ontario communities experience temperatures typically seen in May or June, and for a brief moment, it felt like summer had arrived a little early.
Port Weller, Ont. even saw a high of 22.2 C on Sunday, awarding it the title of Canada’s warmest temperature of 2025.
However, this burst of warmth vanished by Monday, and as if you needed another reminder about how temperamental spring is, double-digit temperatures are set to arrive midweek, only to disappear again by the weekend.
Temperatures will peak on Wednesday as a Colorado low makes its way toward the Great Lakes, but just as quickly as it comes, that warm front will be replaced by cooler temperatures.
According to Environment Canada’s forecast, temperatures will reach a high of 15 C on Wednesday, but by Thursday, temperatures will plummet to – 5 C with the possibility of flurries overnight — a swing of 20 C in less than 24 hours.
As spring often does, the weather rollercoaster won’t be over just yet. Friday’s high will be 8 C, with a low of 1 C, and Saturday brings a chance of showers and a high of just 5 C.
Environment Canada’s forecast for Toronto between March 17 and 21, 2025.
According to The Weather Network’s 2025 spring forecast, “Across most of Canada, we expect a rather typical Canadian spring. Our spring temperature forecast map doesn’t have very much blue or red on the map. We expect that most of Canada will see near-normal temperatures for the season.”
Despite the early arrival of milder weather in March, “spring will sputter at times across Canada through the month of April. While this will test our patience, we expect that spring will finish strong across the country,” the report continues.
In Ontario, the end of March and the first half of April could still bring a few punches from winter, especially in the northern parts of the province. However, the weather agency says that spring will finally take hold in May, and we can expect warmer-than-normal temperatures to lead us to the beginning of summer.
For now, brace yourselves, because there’s still a whole load of turbulent weather to get through before we can officially ditch our jackets and umbrellas for the season.
