Weather is probably a major factor when you plan your trip to Ponmudi, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and February, with an average temperature of 27°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Ponmudi are October, November, May and June, with each month seeing an average of 304 mm of rainfall.