Montréal climate at a glance
Montréal sees average daytime highs ranging from -5°C in January to 26°C in July. Around 1156 mm of precipitation falls over roughly 138 wet days a year, peaking in August (140 mm) and easing off in May (71 mm). July is the sunniest month at about 12 hours of sunshine. Snow is a regular feature from December to March.
Montréal temperature & rainfall by month
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Weather seasons in Montréal
Grouped by the monthly travel score — purely weather-based, not crowd or price data.
Montréal climate, month by month
Averages computed from ERA5 reanalysis data, 2019–2024. Daylight on the 15th: 14.7 h in May. Reuse this data freely with attribution — download as JSON or CSV.
| Month | High | Low | Rain days | Rainfall | Sun/day | Humidity | Score |
|---|---|---|---|---|---|---|---|
| January | -5°C | -13°C | 12.2 | 84 mm | 4.7 h | 79% | 0.0 · Challenging |
| February | -3°C | -13°C | 11.2 | 73 mm | 6.1 h | 76% | 0.0 · Challenging |
| March | 3°C | -6°C | 11.3 | 82 mm | 7.6 h | 70% | 0.4 · Challenging |
| April | 11°C | 0°C | 11.3 | 120 mm | 8.1 h | 66% | 4.6 · Poor |
| May | 18°C | 8°C | 9.3 | 71 mm | 10.4 h | 62% | 9.5 · Excellent |
| June | 23°C | 14°C | 12.5 | 115 mm | 10.8 h | 68% | 8.8 · Excellent |
| July | 26°C | 17°C | 11.8 | 106 mm | 11.8 h | 72% | 8.9 · Excellent |
| August | 24°C | 16°C | 13.3 | 140 mm | 10.5 h | 75% | 8.6 · Excellent |
| September | 20°C | 12°C | 8.7 | 80 mm | 9.3 h | 75% | 9.5 · Excellent |
| October | 14°C | 6°C | 12.2 | 119 mm | 7 h | 76% | 6.1 · Fair |
| November | 5°C | -1°C | 10.7 | 75 mm | 5.6 h | 73% | 1.6 · Challenging |
| December | -1°C | -7°C | 13 | 91 mm | 4.1 h | 75% | 0.0 · Challenging |
Frequently asked questions
What is the best time to visit Montréal?
The best time to visit Montréal is May–July & September, when daytime highs average around 18°C with about 9.3 rainy days per month.
What is the hottest month in Montréal?
July is the hottest month in Montréal, with average highs of 26°C.
What is the rainiest month in Montréal?
August is the rainiest month in Montréal, with around 140 mm of rainfall over 13.3 rainy days.
Where should you go next month?
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