In September, Bath typically sees daytime highs of 17.8°C and overnight lows around 9.7°C. Compared to the annual average high of 13.3°C, September runs +4.5°C.
September in Bath averages a daytime high of 17.8°C and an overnight low of 9.7°C.
September runs +4.5°C compared to Bath's annual average high of 13.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 17.8°C and cooler evenings around 9.7°C.