All signs are pointing towards a noticeably milder start to winter for Ontario this season, as the latest probabilistic weather models point toward a prolonged stretch of warmer-than-average conditions.
Environment and Climate Change Canada (ECCC) has released its multi-month seasonal temperature outlook, revealing that Ontario is overwhelmingly likely to experience above-normal temperatures spanning from November 2026 through January 2027.
From Toronto and the GTA up through northern communities, probabilistic maps show odds leaning heavily into the red. Forecasters attribute the widespread warmth largely to a surging El Niño pattern in the Pacific, which is pushing milder air masses across Central and Eastern Canada and delaying the arrival of prolonged deep-freeze conditions.
While the forecast doesn’t rule out the occasional cold snap or messy storm tracking across the Great Lakes, you can expect fewer sub-zero blasts and a much gentler transition into the heart of the winter months.
The latest model runs place the probability of above-normal temperatures across southern and central Ontario between 70% and 80%, well above standard historical baselines. Keep those heavy parkas on standby just in case, but you might not need them as early as usual this year.
The three-month probabilistic outlook covers November 1, 2026, through January 31, 2027, with regular model updates rolling out monthly.
You can check out the full probabilistic maps and regional data here on the Environment and Climate Change Canada website.
