If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Eratap: The hottest months are usually February and March with an average temp of 81°F, while the coldest months are August and September with an average of 76°F. The rainiest months in Eratap are April, March, January, and February, with each month seeing an average of 11 inches of rainfall.