If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Odiongan: The hottest months are usually May and June with an average temp of 83°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Odiongan are July, October, September, and December, with each month seeing an average of 14 inches of rainfall.