Alentejo · AutumnMonth summary
Alentejo weather in September
✅ Good
🌡️ Temperature min / max
16°C – 28°C
🌧 Rainy days
13% of days
☀️ Sunshine
11.3h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
8.9/10
📅 📅 Best month
June (9.5/10)
Quick decision
Should you visit Alentejo in September?
✅ Good
✅ Yes if: you want to combine beach, sightseeing and hiking — versatile weather (28°C, little rain).
❌ No if: you want to avoid tourist crowds — this is the busiest period.
Our take: Alentejo in September: 28°C and 11.3h of sunshine. Decent, but not the peak.
By trip type
Alentejo in September by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : — No sea access
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in September
Autumn in Alentejo is often underrated: 28°C, golden light and declining crowds. An interesting window. Rain risk remains low (13% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if June (9.5/10) remains theoretically better.
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All months for Alentejo
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ⛅ January | 6°C | 14°C | 26% | 2.1 | 9.0h | 6.3/10 |
| ⛅ February | 7°C | 16°C | 24% | 2.0 | 9.8h | 7.0/10 |
| ⛅ March | 8°C | 17°C | 33% | 3.0 | 10.2h | 7.0/10 |
| 🌤️ April | 10°C | 20°C | 35% | 2.2 | 11.9h | 7.4/10 |
| 🌤️ May | 12°C | 24°C | 19% | 1.3 | 13.0h | 8.5/10 |
| ☀️ June | 15°C | 28°C | 13% | 0.6 | 14.0h | 9.5/10 |
| ☀️ July | 17°C | 33°C | 3% | 0.1 | 13.8h | 8.2/10 |
| ☀️ August | 17°C | 33°C | 2% | 0.1 | 13.0h | 8.2/10 |
| ☀️ September | 16°C | 28°C | 13% | 0.8 | 11.3h | 8.9/10 |
| 🌤️ October | 14°C | 24°C | 25% | 2.5 | 10.1h | 7.9/10 |
| 🌤️ November | 10°C | 18°C | 34% | 2.6 | 8.9h | 7.0/10 |
| ⛅ December | 7°C | 15°C | 27% | 2.3 | 8.1h | 6.5/10 |
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, Alentejo averages 28°C, 13% rainy days and 11.3h of sunshine per day. Overall weather score: 8.9/10.
See methodology →
Comparison
September vs June (best month)
The best month is June (score 9.5/10). Difference:
- 🌡️ Max temperature : +0°C
- 🌧 Rainy days : +0%
- ☀️ Sunshine : +2.7h/day
FAQ
FAQ — Alentejo in September
Is September a good time to visit Alentejo?
September is an excellent time to visit Alentejo (score 8.9/10). With 28°C, 11.3h of sunshine and 13% rain, conditions are very favourable.
What to do in Alentejo in September?
With 28°C and 11.3h of sunshine, all outdoor activities are possible: hiking, sightseeing and terraces.
Accommodation
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