Montreal in Summer — Weather & What to Expect
Summer in Montreal (June, July, August) averages daytime highs of 24.2°C and lows of 15.5°C, with around 363.7mm of rain across the season (36 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in Montreal covers June, July, August.
Summer in Montreal month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 23.3°C | 13.6°C | 110.5mm | 12 | 9/10 |
| July | 25.2°C | 16.9°C | 115.8mm | 12 | 9/10 |
| August | 24.1°C | 15.9°C | 137.4mm | 12 | 9/10 |
What to pack for Montreal in summer
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Frequently Asked Questions
Is summer a good time to visit Montreal?
Summer in Montreal rates around 9/10 — excellent time to visit. Average highs are 24.2°C with 363.7mm of rain across the season.
How hot is Montreal in summer?
Daytime highs average 24.2°C (75.6°F) across June, July, August, with nights around 15.5°C.
What months are summer in Montreal?
Montreal is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit Montreal · Montreal annual climate · Montreal in spring · Montreal in autumn · Montreal in winter
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Once you know what summer in Montreal looks like, find out exactly what to pack for Montreal at 247PackingList. For currency, language and country facts, see the Canada guide at 247CountryInfo.
Summer in Montreal — what to pack
Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →Check clothing sizes in Canada at 247Sizing before you shop.
More summer travel essentials
Last updated:
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.