In September, Marysville typically sees daytime highs of 20.7°C and overnight lows around 8.8°C. Compared to the annual average high of 14.9°C, September runs +5.7°C.
September in Marysville averages a daytime high of 20.7°C and an overnight low of 8.8°C.
September runs +5.7°C compared to Marysville's annual average high of 14.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 20.7°C and cooler evenings around 8.8°C.