Canada's weather shake up for the long weekend: What to expect
Your May long weekend plans will likely require some extra attention to the weather forecast
Expect shifts in Canada’s weather over the May long weekend as the strong western ridge and central trough pattern shows signs of easing. A warmer air mass from the central U.S. and Midwest will attempt to move into the Great Lakes.
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Here’s what to expect across Canada for the unofficial kick off to summer.
British Columbia:
Seasonal temperatures are expected overall. The long weekend kicks off with a wet Friday, with rain and alpine snow across the coast and interior. Conditions transition to a drier trend by Saturday and Sunday.
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Prairies:
Changeable weather will dominate, with a cooling trend expected. Rain on Friday in the central Prairies will turn to snow in northern regions.

A cold front will drop temperatures by Saturday, with highs around 8°C in Calgary and warmer conditions near the U.S. border. Showers may continue in central and southern areas on Saturday and Sunday, with alpine snow in the Rockies, including Banff.
Ontario and Quebec:
The long weekend weather winner? This could be it.

Friday brings seasonal temperatures with a mix of sun and cloud, and highs in the upper teens. By Saturday, southwestern Ontario may reach 20°C or higher, with stray showers possible, but no major rainfall expected.
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Toronto has seen only one 20°C day in May so far (May 4, reaching 23°C). A dry pattern with close-to-seasonal temperatures is expected to continue.

Atlantic Canada:
The weekend starts cool and wet, but a drier, warmer trend is anticipated by Sunday. There is some risk of showers as weather systems track up the East Coast, though their exact paths remain uncertain.

Stay with The Weather Network for updates on this evolving holiday weekend forecast.
