July in Kollam averages a daily high of 30.7°C with nights around 23.6°C. Expect roughly 21.2 wet days totalling 182.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kollam is December–February.
Based on THIRUVANANTHAPURAM, IN (59.8km), 1995–2024. 24 years of July data.