Weather will likely play an important role when you plan your trip to Dodanduwa, and keep in mind that cheaper options are usually available when the weather isn't as good. 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 80°F. The rainiest months in Dodanduwa are May, November, September, and October, with each month seeing an average of 13 inches of rainfall.