Bilbao weather in May
May in Bilbao: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Bilbao · #185 of 897 destinations to visit in May · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Bilbao in May
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Bilbao climate normals — May
| Daytime high | 18°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Rainfall | 68 mm / 2.7 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 14.7 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Bilbao in May — FAQ
- Is May a good time to visit Bilbao?
- May in Bilbao: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Bilbao on SeasonMap's comfort score (89/100).
- What is the weather like in Bilbao in May?
- In May, Bilbao averages a daily high of 18.3°C and a low of 12.5°C, with about 68.3 mm of rain over roughly 13 rainy days.
- What is the air quality in Bilbao in May?
- Bilbao has a mean US Air Quality Index of about 42 in May.