Planning for the weather is a good way to make your trip to Matara relaxing and enjoyable, especially when you’re splurging. The hottest months are usually March and April with an average temp of 81°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Matara are November, May, October, and December, with each month seeing an average of 10 inches of rainfall.