Puerto Cancún in December

November through April gives you Puerto Cancún's best weather – dry, sunny, and breezy. December and January see the biggest crowds and highest prices, especially around Christmas and New Year's when marina restaurants book solid. March offers a sweet spot with good weather but fewer families since spring break focuses on the main hotel zone. February works well for couples seeking romance without the December premium pricing. Avoid September and October when hurricane season peaks. Even if storms miss Cancún directly, you'll deal with rain, humidity, and potential travel disruptions. May through August brings intense heat and afternoon thunderstorms, though resort pools and air conditioning make it manageable.