Hi, Kodaikanal can be visited through the year, but the ideal time to visit is in the winter between October and March. This is when the weather is at its best. The summer and monsoon months, of April to June and between July and September respectively, also make for a good Kodaikanal trip. The weather in Kodaikanal falls into three distinct seasons – the summer, the winter, and the monsoon. October to March – Winter
The winter months between October and March are the best time of the year to head to Kodaikanal. Cool days and the chilly nights make for a comfortable and refreshing break in the mountains; especially since top attractions include outdoor activities like visits to temples, parks, lakes, and trekking and boating. If you plan a January trip, make sure you are there for the Pongal festival. April to June – Summer
Summer in Kodaikanal is a good time to visit. With pleasant, breezy days perfect for the outdoor, and nights that cool down just enough; summer time is conducive to sightseeing, trekking and other outdoor attractions. July to September – Monsoon
Monsoon in Kodaikanal is a pleasant though considerably wet time to visit. Frequent showers hamper sightseeing, with slippery slopes making outdoor activity tricky. But they also transform the hills into lush green slopes, turning your monsoon trip to Kodaikanal into an extremely picturesque experience. Hope this helps.