January in Colombo averages a daily high of 31.3°C with nights around 23.6°C. Expect roughly 5.8 wet days totalling 74.1mm. 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. 12 years of January data.