Porto · AutumnMonth summary
Porto weather in September
✅ Good
🌡️ Temperature min / max
16°C – 22°C
🌧 Rainy days
19% of days
☀️ Sunshine
11.0h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
8.0/10
📅 📅 Best month
August (8.9/10)
Quick decision
Should you visit Porto in September?
✅ Good
✅ Yes if: you want good weather with lower prices than peak season.
❌ No if: you need guaranteed perfect weather — some mixed days are possible.
Our take: Favourable conditions in September (8.0/10). August scores higher but the gap is small.
By trip type
Porto in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ⚠️ Possible
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
🎯 Douro Valley grape harvest — grape treading and tastings Autumn in Porto is often underrated: 22°C, golden light and declining crowds. An interesting window. Rain risk remains low (19% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if August (8.9/10) remains theoretically better.
Browse by month
All months for Porto
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 7°C | 14°C | 40% | 5.9 | 8.1h | 5.0/10 |
| ⛅ February | 8°C | 15°C | 37% | 4.4 | 9.0h | 6.1/10 |
| 🌦️ March | 9°C | 15°C | 46% | 5.2 | 10.1h | 5.7/10 |
| 🌦️ April | 11°C | 17°C | 42% | 4.9 | 11.6h | 7.0/10 |
| 🌤️ May | 13°C | 20°C | 31% | 2.6 | 13.0h | 7.6/10 |
| 🌤️ June | 15°C | 21°C | 26% | 1.6 | 13.2h | 8.0/10 |
| 🌤️ July | 16°C | 23°C | 10% | 0.4 | 13.4h | 8.8/10 |
| 🌤️ August | 16°C | 24°C | 8% | 0.4 | 12.5h | 8.9/10 |
| 🌤️ September | 16°C | 22°C | 19% | 2.2 | 11.0h | 8.0/10 |
| 🌤️ October | 14°C | 20°C | 40% | 5.8 | 9.5h | 7.1/10 |
| 🌦️ November | 10°C | 16°C | 50% | 6.5 | 7.9h | 5.2/10 |
| 🌦️ December | 9°C | 14°C | 47% | 6.3 | 7.3h | 4.4/10 |
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 September, Porto averages 22°C, 19% rainy days and 11.0h of sunshine per day. Overall weather score: 8.0/10.
See methodology →
Comparison
September vs August (best month)
The best month is August (score 8.9/10). Difference:
- 🌡️ Max temperature : +2°C
- 🌧 Rainy days : -11%
- ☀️ Sunshine : +1.5h/day
FAQ
FAQ — Porto in September
Is September a good time to visit Porto?
September is an excellent time to visit Porto (score 8.0/10). With 22°C, 11.0h of sunshine and 19% rain, conditions are very favourable.
What to do in Porto in September?
With 22°C and 11.0h of sunshine, all outdoor activities are possible: hiking, sightseeing and terraces.
Accommodation
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Activities & tours
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