Montreal’s under another extreme heat warning — Here’s how long the sticky weather will last

<img src="https://www.mtlblog.com/media-library/people-walking-under-misting-system-to-cool-off-during-heatwave-in-montreal.jpg?id=61320570&width=1200&height=800&coordinates=132%2C0%2C132%2C0"/><br/><br/><p>If it feels like Montreal's had more <a href="https://www.mtlblog.com/tag/montreal-weather" target="_blank">sweaty weather stretches</a> than dry ones this summer, you're not wrong. In fact, at this point, it's getting hard to keep track.</p><p>Now, Montreal is back under another extreme heat warning, with the latest <a href="https://weather.gc.ca/en/location/index.html?coords=45.529,-73.562" target="_blank">alert issued early Thursday by Environment Canada</a>. The forecast calls for daytime highs above 30°C and humidex values near 40, making it another tough stretch for anyone without AC. And don't expect much relief after sunset, as overnight lows will stay above 20°C, which is considered "uncomfortable" by the agency's standards.</p><p>The heat warning is in effect until Friday for Montreal, Montérégie, and Lanaudière, though the muggy weather could hang around longer depending on how the forecast evolves.</p>"Take action to protect yourself and others," Environment Canada said in its notice. "Extreme heat can affect everyone's health."<p>Hydration, shade, and checking in on older or isolated people are all recommended — as is avoiding outdoor activities during the hottest parts of the day. If your living space is too hot, officials suggest heading to a cooler public space like a library, community centre, or shaded park. And yes, never leave people or pets in parked vehicles.</p><p>Here's what the next few days in Montreal are looking like:</p><ul><li> <strong>Thursday, July 24:</strong> Mainly sunny, high of 33°C, humidex 40. Risk of thunderstorms overnight.</li><li> <strong>Friday, July 25:</strong> Showers in the morning, high of 27°C, humidex 35.</li><li> <strong>Saturday, July 26:</strong> Sunny and 28°C.</li><li> <strong>Sunday, July 27:</strong> Sunny and 31°C.</li><li> <strong>Monday, July 28:</strong> Sunny and 33°C.</li><li> <strong>Tuesday, July 29:</strong> Chance of showers, high of 29°C.</li><li> <strong>Wednesday, July 30:</strong> A mix of sun and cloud, high of 25°C.</li></ul><div>While Friday's rain should help cool things off, three out of the next six days are expected to feature daytime highs exceeding 29°C.</div><p>You can find updates and tips from Environment Canada at <a href="https://weather.gc.ca/" target="_blank">weather.gc.ca</a>.</p><p><em>Love this? Check out our <a href="https://www.mtlblog.com/notices/" target="_blank">MTL Blog noticeboard</a> for details on jobs, benefits, travel info and more!</em></p><p><em>AI tools may have been used to support the creation or distribution of this content; however, it has been carefully edited and fact-checked by a member of MTL Blog's Editorial team. For more information on our use of AI, please visit our <a href="https://www.mtlblog.com/editorial-standards" target="_blank">Editorial Standards page</a>.</em></p>

mingooland July 24, 2025

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