In April, San Sebastian typically sees daytime highs of 15.2°C and overnight lows around 8.3°C. Compared to the annual average high of 17.1°C, April runs -1.9°C.
April in San Sebastian averages a daytime high of 15.2°C and an overnight low of 8.3°C.
April runs -1.9°C compared to San Sebastian's annual average high of 17.1°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 15.2°C and cooler evenings around 8.3°C.