Climate in Montreal — Annual Weather Overview
Montreal has a continental climate — hot summers, cold winters and moderate rainfall. The hottest month is July (average high 25.2°C) and the coolest is January (-5.7°C). The seasons are strongly defined — a 30.9°C swing between July highs and January lows. Annual rainfall totals around 1152mm. August is the wettest month at 137.4mm, while May averages just 56.6mm. Average daily sunshine is 8.0 hours.
**Spring (March, April, May):** average highs 10.5°C, 255mm rain. **Summer (June, July, August):** average highs 24.2°C, 364mm rain. **Autumn (September, October, November):** average highs 13.0°C, 277mm rain. **Winter (December, January, February):** average highs -3.3°C, 256mm rain.
Montreal — Monthly Temperatures
Montreal — Monthly Rainfall
✅ Best months to visit
March to November
ℹ️ No months to avoid
Weather in Montreal stays reasonable all year.
Montreal weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | -5.7°C | -13.9°C | 79.3mm | 4.8h | 11 | 6/10 |
| February | -4.2°C | -13.7°C | 80.7mm | 5.9h | 12 | 6/10 |
| March | 2.7°C | -6.5°C | 88.3mm | 7.6h | 11 | 8/10 |
| April | 10.4°C | 0.0°C | 110.3mm | 8.3h | 10 | 9/10 |
| May | 18.3°C | 6.9°C | 56.6mm | 10.8h | 8 | 10/10 |
| June | 23.3°C | 13.6°C | 110.5mm | 10.8h | 12 | 9/10 |
| July | 25.2°C | 16.9°C | 115.8mm | 11.6h | 12 | 9/10 |
| August | 24.1°C | 15.9°C | 137.4mm | 10.5h | 12 | 9/10 |
| September | 19.7°C | 11.5°C | 85.9mm | 9.2h | 8 | 10/10 |
| October | 13.6°C | 6.1°C | 117.9mm | 6.7h | 12 | 9/10 |
| November | 5.6°C | -1.3°C | 73.0mm | 5.7h | 10 | 10/10 |
| December | -0.1°C | -6.7°C | 95.9mm | 4.0h | 12 | 6/10 |
For the full verdict on when to go, see the best time to visit Montreal. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Montreal have?
Montreal has a continental climate — hot summers, cold winters and moderate rainfall. Average highs range from -5.7°C in January to 25.2°C in July.
What is the hottest month in Montreal?
July is the hottest month in Montreal, with average highs of 25.2°C and lows of 16.9°C.
What is the coldest month in Montreal?
January is the coolest month, with average highs of -5.7°C and lows of -13.9°C.
What is the wettest month in Montreal?
August is the wettest month, averaging 137.4mm of rainfall over around 12 rainy days.
How much rain does Montreal get per year?
Montreal receives around 1152mm of rain per year. The driest month is May (56.6mm).
When is the best time to visit Montreal?
The best time to visit Montreal is March to November. See the full month-by-month guide →
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Trip essentials for Montreal
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.