San Sebastián weather in January
January in San Sebastián: nice, dry — an excellent time to visit.
#6 of 12 months in San Sebastián · #119 of 604 destinations to visit in January · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
San Sebastián climate normals — January
| Daytime high | 20°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 13 mm / 0.5 in | ☀️ dry |
| Rainy days | 2 days | |
| Humidity | 68% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 10.6 h | |
| Wind | 20 km/h / 13 mph | |
| Air quality (US AQI) | 53 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is San Sebastián?
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San Sebastián in January — FAQ
- Is January a good time to visit San Sebastián?
- January in San Sebastián: nice, dry — an excellent time to visit. It ranks #6 of 12 months for San Sebastián on SeasonMap's comfort score (84/100).
- What is the weather like in San Sebastián in January?
- In January, San Sebastián averages a daily high of 20.3°C and a low of 17.8°C, with about 12.7 mm of rain over roughly 2.2 rainy days.
- What is the air quality in San Sebastián in January?
- San Sebastián has a mean US Air Quality Index of about 53 in January.