In September, Exeter typically sees daytime highs of 17.5°C and overnight lows around 10.0°C. Compared to the annual average high of 13.0°C, September runs +4.4°C.
September in Exeter averages a daytime high of 17.5°C and an overnight low of 10.0°C.
September runs +4.4°C compared to Exeter's annual average high of 13.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 17.5°C and cooler evenings around 10.0°C.