If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Ramanathapuram: The hottest months are usually May and June with an average temp of 86°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Ramanathapuram are November, October, December, and September, with each month seeing an average of 7 inches of rainfall.