If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Poornankuppam: The hottest months are usually May and June with an average temp of 87°F, while the coldest months are January and February with an average of 78°F. The rainiest months in Poornankuppam are November, October, December, and August, with each month seeing an average of 9 inches of rainfall.