Planning for the weather is a good way to make your trip to Fortin de las Flores relaxing and enjoyable, especially when you’re splurging. The hottest months are usually April and May with an average temp of 70°F, while the coldest months are January and February with an average of 63°F. The rainiest months in Fortin de las Flores are September, June, August, and July, with each month seeing an average of 10 inches of rainfall.