In September, Colchester typically sees daytime highs of 18.2°C and overnight lows around 10.8°C. Compared to the annual average high of 13.1°C, September runs +5.1°C.
September in Colchester averages a daytime high of 18.2°C and an overnight low of 10.8°C.
September runs +5.1°C compared to Colchester's annual average high of 13.1°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.2°C and cooler evenings around 10.8°C.