September in Colchester averages a daily high of 19.9°C with nights around 9.7°C. Expect roughly 9.8 wet days totalling 43.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Colchester is June–September.
Based on EAST BERGHOLT, UK (11.4km), 1995–2024. 22 years of September data.