Weather can make or break a roadtrip, so we've gathered some data about year-round temperatures in Olanguina to help you plan yours. The hottest months are usually February and January with an average temp of 76°F, while the coldest months are July and August with an average of 72°F. The rainiest months in Olanguina are October, May, September, and November, with each month seeing an average of 9 inches of rainfall.