The city of Trivandrum has overlapping seasons and is known for its high humidity all year round. The weather in Trivandrum, like most of Kerala, is quiet warmeven though unexpected rainfalls are common.
Summer: April to June is summer season. Summers can get as high as 35 degrees Celsius with high humidity. May and June are known for a few spells of rain.
Rainy Season: July to October is rainy season and even though it does not rain as much as the rest of Kerala, Trivandrum receives substantial amounts of rain in these months. It is common for rainfall in November and April too.
Winter: December to March is winter season with temperatures touching an 18 degrees Celsius at higher regions.
The best time to visit Trivandrum is from December to March.