In September, Saint-Malo typically sees daytime highs of 19.3°C and overnight lows around 12.3°C. Compared to the annual average high of 14.2°C, September runs +5.0°C.
September in Saint-Malo averages a daytime high of 19.3°C and an overnight low of 12.3°C.
September runs +5.0°C compared to Saint-Malo's annual average high of 14.2°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 19.3°C and cooler evenings around 12.3°C.