Yes. Montreal is generally colder than Toronto, with a particularly clear difference in winter. This describes long-term climate rather than a guarantee that Montreal is colder on every day or in every month.
Environment and Climate Change Canada's 1981–2010 normals show an annual mean temperature of 6.8°C at Montreal–Trudeau Airport, compared with 8.2°C at Toronto Pearson. January averages were −9.7°C and −5.5°C respectively, making Montreal 4.2°C colder in that month. Weather Spark's separate climate analysis also shows colder winter conditions in Montreal.
The gap becomes much smaller in summer: the same airport records give July means of 21.2°C in Montreal and 21.5°C in Toronto. These are historical airport averages, not current forecasts or measurements for every neighborhood. Station choice and reference period affect the exact comparison.
Montreal's winters are colder on average, while its summer temperatures are much closer to Toronto's.
Environment and Climate Change Canada
For 1981–2010, Montreal–Trudeau recorded an annual mean of 6.8°C and a January mean of −9.7°C. Toronto Pearson recorded 8.2°C and −5.5°C. The differences are 1.4°C annually and 4.2°C in January.
Based on: Environment and Climate Change Canada
Environment and Climate Change Canada
July mean temperatures were 21.2°C at Montreal–Trudeau and 21.5°C at Toronto Pearson. The colder overall climate does not imply a large temperature gap throughout the year.
Based on: Environment and Climate Change Canada
Weather Spark
Weather Spark's comparison shows lower average winter highs and lows in Montreal. Its summer results also demonstrate that Montreal is not uniformly colder across all seasons and temperature measures.
Based on: Weather Spark
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