In September, Santander typically sees daytime highs of 21.8°C and overnight lows around 13.2°C. Compared to the annual average high of 16.8°C, September runs +5.0°C.
September in Santander averages a daytime high of 21.8°C and an overnight low of 13.2°C.
September runs +5.0°C compared to Santander's annual average high of 16.8°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 21.8°C and cooler evenings around 13.2°C.