What to pack for Montréal in August
- t-shirts and light layers
- a light jacket for evenings
- a compact umbrella or rain shell — rain is frequent
Humidity averages 75%; max daily wind around 17 km/h.
How August compares
Best months in Montréal: May–July & September. See the full best time to visit Montréal guide.
Montréal in August: the details
In August, Montréal sees average daytime highs of 24°C (76°F) and overnight lows of 16°C (61°F). Rainfall totals roughly 140 mm across 13.3 rainy days, and the sun shines about 10.5 hours per day with 13.9 hours of daylight mid-month. Relative humidity averages 75%.
In context: August is the second-warmest month and the wettest in Montréal. The sunniest month is July (11.8 h/day).
| Metric | August average |
|---|---|
| Daytime high | 24°C / 76°F |
| Overnight low | 16°C / 61°F |
| Rainfall | 140 mm over 13.3 rainy days |
| Sunshine | 10.5 h/day (13.9 h daylight) |
| Humidity | 75% |
| Travel score | 8.6 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Montréal, Canada (45.51, -73.59) — see our methodology. Actual conditions vary year to year.
Not set on Montréal? Browse the best places to visit in August ranked by travel score.
Frequently asked questions
How hot is Montréal in August?
Daytime highs in Montréal in August average 24°C (76°F); nights drop to about 16°C.
Does it rain in Montréal in August?
Expect around 13.3 rainy days and 140 mm of rainfall in August.
Is August a good time to visit Montréal?
August is one of the best months to visit Montréal. Overall travel score: 8.6/10. The best months are May–July & September.
Also good in August, near Montréal
Where should you go next month?
Get one email a month with the destinations at their seasonal best. Double opt-in, unsubscribe anytime.