In October, San Sebastian typically sees daytime highs of 18.8°C and overnight lows around 11.6°C. Compared to the annual average high of 17.1°C, October runs +1.7°C.
October in San Sebastian averages a daytime high of 18.8°C and an overnight low of 11.6°C.
October runs +1.7°C compared to San Sebastian's annual average high of 17.1°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 18.8°C and cooler evenings around 11.6°C.