San Sebastián weather in October
October in San Sebastián: hot, dry, with clean air — an excellent time to visit.
#9 of 12 months in San Sebastián · #257 of 604 destinations to visit in October · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
San Sebastián climate normals — October
| Daytime high | 25°C / 78°F | 🥵 hot |
|---|---|---|
| Nighttime low | 23°C / 74°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 9 mm / 0.4 in | ☀️ dry |
| Rainy days | 2 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 20°C / 68°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 11.5 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
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 October — FAQ
- Is October a good time to visit San Sebastián?
- October in San Sebastián: hot, dry, with clean air — an excellent time to visit. It ranks #9 of 12 months for San Sebastián on SeasonMap's comfort score (81/100).
- What is the weather like in San Sebastián in October?
- In October, San Sebastián averages a daily high of 25.4°C and a low of 23.2°C, with about 8.9 mm of rain over roughly 2 rainy days.
- What is the air quality in San Sebastián in October?
- San Sebastián has a mean US Air Quality Index of about 42 in October.