Taking into account the local weather in Thenmala is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually March and February with an average temp of 81°F, while the coldest months are January and December with an average of 78°F. The rainiest months in Thenmala are June, October, August, and May, with each month seeing an average of 13 inches of rainfall.