In September, Plymouth typically sees daytime highs of 30.5°C and overnight lows around 24.5°C. Compared to the annual average high of 29.3°C, September runs +1.2°C.
September in Plymouth averages a daytime high of 30.5°C and an overnight low of 24.5°C.
September runs +1.2°C compared to Plymouth's annual average high of 29.3°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 30.5°C and cooler evenings around 24.5°C.