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montreal weather

Fall might technically be here, but Montreal's weather forecast looks more like midsummer.

According to a new report from MétéoMédia, the city is about to swing from a short taste of seasonal chill right back into a streak of abnormal October heat — with highs pushing the mid-20s and beyond.

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Southern Quebec is about to trade one of its sunniest Septembers for chillier, rainier October weather.

According to the Old Farmer's Almanac, the Montreal region will run about one degree colder than usual, with temperatures averaging 7°C over the following month. Precipitation is expected to land around 80 mm, slightly below normal, but still enough to make umbrellas a staple.

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The official arrival of fall is still a couple of weeks away, but Montreal's upcoming weather changes are already coming into focus. The Weather Network just released its 2025 fall forecast for different parts of Canada, and it hints at a season that could play out differently than what we're used to.

According to meteorologists, Quebec got an early taste of autumn during late August and early September, when temperatures dropped off sharply after weeks of summer heat. But for the core of the season — from mid-September through October — Montreal and much of the province are expected to stay on the mild side.

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There's a new Canadian winter forecast for 2025 and 2026.

It includes details about when Quebec's weather will be snowiest and coldest this season.

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After a summer full of heat waves, sticky humidity, surprise downpours and even a few air quality alerts, you might be hoping September weather gives folks in Quebec a smooth landing into fall. The latest long-range forecast from the Farmers' Almanac says… well, not exactly.

The century-old publication — known for using a quirky mix of math and astronomy to make long-range predictions — is calling for a bit of everything next month. And while it's not the most scientific forecast in the world, its big-picture outlook tends to line up with reality more often than you'd think.

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It might feel impossible to imagine while we're sweating through humidex values near 40°C, but the Farmers' Almanac just dropped its 2025–2026 winter outlook for Quebec — and it's painting a very chilly picture.

For northern Quebec, the forecast warns of "dangerous wind chills and prolonged deep freezes" through January and February, with Arctic air masses expected to dominate. These frigid spells could last for days at a time, bringing the kind of cold that keeps you indoors.

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Montreal is starting the week with a wall of heat, and it's only going to get hotter before it breaks. The city remains under a severe heat warning, with weather experts at Environment Canada calling for dangerously high temperatures through Tuesday.

Today's forecast is already pushing summer to the limit. Folks on the island can expect sunny skies, a high of 34°C and humidex values around 40°C. Overnight, it will only cool to about 22°C, meaning little relief before Tuesday's peak heat hits.

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If it feels like Montreal's had more sweaty weather stretches than dry ones this summer, you're not wrong. In fact, at this point, it's getting hard to keep track.

Now, Montreal is back under another extreme heat warning, with the latest alert issued early Thursday by Environment Canada. 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.

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Montreal usually isn't the kind of city you'd expect to see ranked among the world's most polluted places — but today, it's near the top.

As of Tuesday morning, Montreal had the fifth-worst air quality of any major city on the planet, according to IQAir's live global index. With an air quality rating of 153 as of 9:42 a.m., the city ranked higher in pollution than Jakarta, Kolkata, Shanghai, Dhaka and New Delhi — places far more commonly associated with smog and poor air conditions.

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The fall forecast for Canada is out now.

It revealed when Quebec's weather will bring wet snow, cooler temperatures and more during the season.

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After a soggy and sticky start to summer, August in Montreal may finally bring the kind of summer weather many of us have been waiting for. But before you get too excited about endless blue skies and sunny stretches, you might want to brace for a few more storms.

According to long-range data from the 2024–2025 Farmers' Almanac, August will be warmer than usual in southern Quebec, with average daytime highs around 20 °C, which is about a degree above normal. That said, the month is also expected to bring above-average precipitation — around 120 mm total, or roughly 25 mm more than usual.

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Folks in Montreal might want to wrap up Canada Day by looking up towards the heavens — and no, we're not just talking about fireworks.

A small but real chance of seeing the northern lights is in the forecast for Tuesday night, thanks to a geomagnetic storm that could push auroras as far south as southern Quebec. While most of the colourful action is expected in places like Edmonton, Winnipeg, Yellowknife, and Whitehorse, Montreal is sitting right near the edge of the visibility zone — meaning a faint green glow on the northern horizon isn't out of the question.

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