Planning for the weather is an important factor for making your trip to Rameshwaram a success, especially when you’re splurging. The hottest months are usually May and April with an average temp of 84°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Rameshwaram are November, December, October, and May, with each month seeing an average of 11 inches of rainfall.