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Barbeques, fireworks, pool parties. Will the weather cooperate? Its'a a long weekend for many and the start to summer holidays across Ontario. Dr. Doug Gillham provides a detailed outlook.

Classic summer weekend ahead in Ontario: High heat, humidity and thunderstorms

Andrea Bagley
Digital Reporter

Wednesday, June 25, 2014, 9:44 AM - This week marks the first full week of summer and there's no doubt the Canada Day long weekend is on many people's minds. 

Barbeques, fireworks, pool parties. Will the weather cooperate?

"The heat and humidity will be on the increase in Ontario and it's really going to feel like summer," says Weather Network meteorologist Doug Gillham. "Unfortunately, with the increasing heat and humidity will also come the threat for showers and thunderstorms."


The good news is as we kick off the weekend on Friday, conditions are looking great.

"It's a great travel day with lots of sunshine and comfortably low humidity," Gillham says. 

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Each day of the weekend, temperatures are expected to increase along with the humidity.

"And so does that threat for showers and thunderstorms," Gillham says. "We're not expecting all day rains at least through Monday, but that thunderstorm threat increases as we get closer to Canada Day."

Despite cooler air approaching the Great Lakes on Tuesday, conditions will remain fairly muggy.

"The challenge is the timing of the cold front," Gillham adds. "We just don't know yet whether that will be during the day on Tuesday or whether that will hold off until later. So we're certainly going to see some fireworks on Tuesday, whether they're the natural or scheduled ones remains to be seen."


With it being a long weekend for some, or even the start of summer vacations, Gillham is warning Ontarians to keep their eye to the sky.

EXTENDED ACTIVE WEATHER COVERAGE: Tune in to The Weather Network for live updates on the summer storms in your area. Our team of reporters and meteorologists in the field provide you with the most accurate and up-to-date coverage.

"These will be your typical summer storms, and winds are expected to pick up for Monday and Tuesday," says Gillham. "With a lot of people expected to be enjoying the weather outdoors or on the water, it's important to keep checking the forecast and staying up to date on the weather watches and warnings in your area."

The summer heat continues to build in next week with humidex values in the mid to upper 30s and overnight lows in the lower 20s expected.

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