Santiago de Compostela weather in December
December in Santiago de Compostela: cool, soaked, with clean air — a gamble, with 18 rainy days.
#12 of 12 months in Santiago de Compostela · #679 of 897 destinations to visit in December · comfort 57/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Santiago de Compostela in December
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Santiago de Compostela climate normals — December
| Daytime high | 12°C / 54°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 43°F | |
| Rainfall | 204 mm / 8 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 90% | 💦 very humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 4.9 h/day | |
| Daylight | 9.1 h | |
| Wind | 22 km/h / 14 mph | |
| Air quality (US AQI) | 32 | 🍃 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 December — FAQ
- Is December a good time to visit Santiago de Compostela?
- December in Santiago de Compostela: cool, soaked, with clean air — a gamble, with 18 rainy days. It ranks #12 of 12 months for Santiago de Compostela on SeasonMap's comfort score (57/100).
- What is the weather like in Santiago de Compostela in December?
- In December, Santiago de Compostela averages a daily high of 12.2°C and a low of 6.2°C, with about 204 mm of rain over roughly 17.6 rainy days.
- What is the air quality in Santiago de Compostela in December?
- Santiago de Compostela has a mean US Air Quality Index of about 32 in December.