Montreal · SummerMonth summary
Montreal weather in August
✅ Good
🌡️ Temperature min / max
17°C – 25°C
🌧 Rainy days
41% of days
☀️ Sunshine
12.5h per day on average
🌊 🌊 Season
Summer
⭐ ⭐ Weather score
7.9/10
📅 📅 Best month
July (8.3/10)
Quick decision
Should you visit Montreal in August?
✅ Good
✅ Yes if: you want to explore cultural sites and local food.
❌ No if: you need guaranteed sunshine for photos or outdoor activities.
Our take: Favourable conditions in August (7.9/10). July scores higher but the gap is small.
By trip type
Montreal in August by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ✅ Good
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in August
🎯 Peak cultural season — museums and sites accessible in good weather conditions Summer in Montreal brings pleasant temperatures (25°C) and long sunny days (12.5h of sunshine). Expect rain on 41% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if July (8.3/10) remains theoretically better.
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All months for Montreal
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ❄️ January | -12°C | -3°C | 39% | 2.5 | 5.7h | 3.2/10 |
| ❄️ February | -12°C | -2°C | 41% | 2.9 | 7.0h | 3.6/10 |
| 🌨️ March | -5°C | 4°C | 40% | 2.7 | 8.9h | 4.0/10 |
| 🌦️ April | 1°C | 10°C | 42% | 3.9 | 9.8h | 4.6/10 |
| 🌤️ May | 8°C | 19°C | 35% | 2.6 | 11.9h | 7.3/10 |
| 🌤️ June | 14°C | 24°C | 43% | 3.7 | 12.6h | 7.8/10 |
| 🌤️ July | 18°C | 27°C | 39% | 3.4 | 13.3h | 8.3/10 |
| 🌤️ August | 17°C | 25°C | 41% | 3.8 | 12.5h | 7.9/10 |
| 🌤️ September | 13°C | 22°C | 27% | 2.3 | 11.0h | 7.8/10 |
| ⛅ October | 7°C | 14°C | 38% | 4.1 | 8.2h | 5.2/10 |
| 🌦️ November | -1°C | 5°C | 44% | 2.8 | 5.8h | 2.8/10 |
| 🌨️ December | -8°C | 0°C | 42% | 2.8 | 4.9h | 2.6/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In August, Montreal averages 25°C, 41% rainy days and 12.5h of sunshine per day. Overall weather score: 7.9/10.
See methodology →
Comparison
August vs July (best month)
The best month is July (score 8.3/10). Difference:
- 🌡️ Max temperature : +2°C
- 🌧 Rainy days : -2%
- ☀️ Sunshine : +0.8h/day
FAQ
FAQ — Montreal in August
Is August a good time to visit Montreal?
August is an excellent time to visit Montreal (score 7.9/10). With 25°C, 12.5h of sunshine and 41% rain, conditions are very favourable.
What to do in Montreal in August?
With 25°C max and 12.5h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in Montreal
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