Long Weekend Weather: Thunderstorms, cooler temperatures forecast for Toronto

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Published May 16, 2025 at 11:53 am

thunderstorm toronto
Thunderstorms are in the forecast this long weekend in Toronto. Photo: Andre Furtado

More thunderstorms could be on the way this long weekend in Toronto.

A storm brought a burst of rain early Friday in the city, and hot weather with a humidex of 29 C is expected Friday afternoon, according to Environment and Climate Change Canada.

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Temperatures will drop to around 14 C Friday night and there is a risk of a thunderstorm overnight. Up to 15 mm of rain could fall in some areas of the city.

On Saturday, showers will continue along with a risk of a thunderstorm in the morning. Up to 15 mm of rain is forecast again.

Wind gusts of up to 50 km/h are expected during the day. A high of 20 C is expected, dropping down to 13 C in the evening.

A mix of sun and cloud is expected on Sunday with a high of 17 C. A low of 4 C is forecast for the evening.

On the holiday Monday, expect clear, sunny skies with a high of 16 C and lows down to 5 C.

The normal high for this time of year is 19 C, according to Environment Canada.

long weekend weather ontario