In September, Weymouth typically sees daytime highs of 22.6°C and overnight lows around 11.8°C. Compared to the annual average high of 15.1°C, September runs +7.5°C.
September in Weymouth averages a daytime high of 22.6°C and an overnight low of 11.8°C.
September runs +7.5°C compared to Weymouth's annual average high of 15.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.6°C and cooler evenings around 11.8°C.