In January, San Sebastian typically sees daytime highs of 11.4°C and overnight lows around 5.0°C. Compared to the annual average high of 17.1°C, January runs -5.7°C.
January in San Sebastian averages a daytime high of 11.4°C and an overnight low of 5.0°C.
January runs -5.7°C compared to San Sebastian's annual average high of 17.1°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 11.4°C and cooler evenings around 5.0°C.