If you're looking forward to lots of outings with your partner, check out these details about year-round temperatures in Hernandarias: The hottest months are usually January and December with an average temp of 79°F, while the coldest months are July and June with an average of 64°F. The rainiest months in Hernandarias are October, May, December, and January, with each month seeing an average of 8 inches of rainfall.