Planning for the weather is a good way to make your trip to Hernandarias relaxing and enjoyable, especially when you're splurging. 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.