Planning for the weather is a good way to make your trip to Kodaikanal relaxing and enjoyable, especially when you’re splurging. The hottest months are usually April and May, with an average temperature of 28°C, while the coldest months are January and December, with an average of 24°C. The rainiest months in Kodaikanal are October, November, August and December, with each month seeing an average of 179 mm of rainfall.