Santiago de Compostela weather in May
May in Santiago de Compostela: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Santiago de Compostela · #247 of 897 destinations to visit in May · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Santiago de Compostela in May
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Santiago de Compostela climate normals — May
| Daytime high | 19°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Rainfall | 54 mm / 2.1 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 11.5 h/day | |
| Daylight | 14.7 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Santiago de Compostela in May — FAQ
- Is May a good time to visit Santiago de Compostela?
- May in Santiago de Compostela: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Santiago de Compostela on SeasonMap's comfort score (88/100).
- What is the weather like in Santiago de Compostela in May?
- In May, Santiago de Compostela averages a daily high of 19.2°C and a low of 9.8°C, with about 54 mm of rain over roughly 10 rainy days.
- What is the air quality in Santiago de Compostela in May?
- Santiago de Compostela has a mean US Air Quality Index of about 35 in May.