Isla Holbox in September

November through April delivers Holbox's perfect weather — dry, sunny, and pleasantly warm with highs around 80°F. This is peak season, so expect higher prices and more crowds, especially around Christmas and Easter. May gets hot and humid, but it's still manageable if you don't mind sweating a bit. June through September brings whale sharks but also rain, heat, and humidity that can be brutal. September and October see the heaviest rains and many businesses close entirely. For the best balance of weather, wildlife, and prices, aim for November or February. You'll miss whale shark season, but flamingo watching is excellent, the weather is perfect, and hotel rates drop significantly after New Year's.