May in Colchester averages a daily high of 17.5°C with nights around 6.9°C. Expect roughly 10.2 wet days totalling 47.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Colchester is June–September.
Based on EAST BERGHOLT, UK (11.4km), 1995–2024. 23 years of May data.