Bilbao · AutumnMonth summary
Bilbao weather in September
✅ Good
🌡️ Temperature min / max
59°F – 75°F
🌧 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°F.
❌ 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
Autumn in Bilbao is often underrated: 24°F, 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 °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌦️ January | 43°F | 54°F | 50% | 0.2in | 5.9h | 4.0/10 |
| 🌦️ February | 43°F | 59°F | 47% | 0.1in | 7.6h | 5.0/10 |
| 🌦️ March | 45°F | 61°F | 54% | 0.1in | 9.0h | 5.5/10 |
| 🌦️ April | 48°F | 63°F | 46% | 0.1in | 10.2h | 7.0/10 |
| 🌦️ May | 52°F | 66°F | 46% | 0.1in | 11.7h | 7.2/10 |
| 🌤️ June | 59°F | 73°F | 41% | 0.1in | 11.3h | 7.6/10 |
| 🌤️ July | 63°F | 75°F | 31% | 0.1in | 12.1h | 8.1/10 |
| 🌤️ August | 63°F | 77°F | 30% | 0.1in | 11.9h | 8.2/10 |
| 🌤️ September | 59°F | 75°F | 40% | 0.1in | 10.7h | 7.7/10 |
| 🌦️ October | 55°F | 70°F | 41% | 0.1in | 8.7h | 7.2/10 |
| 🌦️ November | 48°F | 61°F | 55% | 0.2in | 6.9h | 4.6/10 |
| 🌦️ December | 45°F | 57°F | 49% | 0.2in | 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 75°F, 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°F
- 🌧 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 75°F, 10.7h of sunshine and 40% rain, conditions are very favourable.
What to do in Bilbao in September?
With 75°F max and 10.7h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
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