Planning for the weather is a good way to make your trip to Peradeniya relaxing and enjoyable, especially when you're splurging. The hottest months are usually March and April, with an average temperature of 24°C, while the coldest months are January and February, with an average of 23°C. The rainiest months in Peradeniya are November, October, December and April, with each month seeing an average of 355 mm of rainfall.