Planning for the weather is a good way to make your trip to Frontera relaxing and enjoyable, especially when you're splurging. The hottest months are usually May and April, with an average temperature of 29°C, while the coldest months are January and February, with an average of 23°C. The rainiest months in Frontera are September, October, June and August, with each month seeing an average of 288 mm of rainfall.