Bilbao · AutumnMonth summary
Bilbao weather in September
✅ Good
🌡️ Temperature min / max
15°C – 24°C
🌧 Rainy days
40% of days
☀️ Sunshine
10.7h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
7.7/10
📅 📅 Best month
August (8.2/10)
Quick decision
Should you visit Bilbao in September?
✅ Good
✅ Yes if: you want shoulder-season value — fewer crowds, 24°C.
❌ No if: you need maximum sunshine — some overcast days are possible.
Our take: Favourable conditions in September (7.7/10). August scores higher but the gap is small.
By trip type
Bilbao 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
🎯 Balanced surf conditions — consistent waves and fewer surfers in the lineup Autumn in Bilbao is often underrated: 24°C, golden light and declining crowds. An interesting window. Expect rain on 40% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if August (8.2/10) remains theoretically better.
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All months for Bilbao
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 6°C | 12°C | 50% | 4.6 | 5.9h | 4.0/10 |
| 🌦️ February | 6°C | 15°C | 47% | 3.8 | 7.6h | 5.0/10 |
| 🌦️ March | 7°C | 16°C | 54% | 3.4 | 9.0h | 5.5/10 |
| 🌦️ April | 9°C | 17°C | 46% | 2.9 | 10.2h | 7.0/10 |
| 🌦️ May | 11°C | 19°C | 46% | 2.6 | 11.7h | 7.2/10 |
| 🌤️ June | 15°C | 23°C | 41% | 2.3 | 11.3h | 7.6/10 |
| 🌤️ July | 17°C | 24°C | 31% | 1.5 | 12.1h | 8.1/10 |
| 🌤️ August | 17°C | 25°C | 30% | 1.6 | 11.9h | 8.2/10 |
| 🌤️ September | 15°C | 24°C | 40% | 2.6 | 10.7h | 7.7/10 |
| 🌦️ October | 13°C | 21°C | 41% | 3.2 | 8.7h | 7.2/10 |
| 🌦️ November | 9°C | 16°C | 55% | 5.5 | 6.9h | 4.6/10 |
| 🌦️ December | 7°C | 14°C | 49% | 4.1 | 6.0h | 4.2/10 |
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, Bilbao averages 24°C, 40% rainy days and 10.7h of sunshine per day. Overall weather score: 7.7/10.
See methodology →
Comparison
September vs August (best month)
The best month is August (score 8.2/10). Difference:
- 🌡️ Max temperature : +1°C
- 🌧 Rainy days : -10%
- ☀️ Sunshine : +1.2h/day
FAQ
FAQ — Bilbao in September
Is September a good time to visit Bilbao?
September is an excellent time to visit Bilbao (score 7.7/10). With 24°C, 10.7h of sunshine and 40% rain, conditions are very favourable.
What to do in Bilbao in September?
With 24°C max and 10.7h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in Bilbao
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