October in Colombo averages a daily high of 30.5°C with nights around 25°C. Expect roughly 21.2 wet days totalling 322.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Colombo is January–February.
Based on COLOMBO, CE (4.4km), 1995–2024. 11 years of October data.