Regional Weather Summary Table Region Average High Average Low Conditions Mexico City 23°C (73°F) 10°C (50°F) Sunny and dry Cancún 29°C (84°F) 20°C (68°F) Sunny and humid. However, due to the altitude and the dry air, the temperature can drop significantly after sunset, often falling to between 6°C and 12°C (43°F and 54°F), necessitating a jacket or sweater.
Best Destinations Mexico December Weather and Regional Insights
What to Pack for December Travel Packing for Mexico in December requires a strategy that addresses both the warm daytime heat and the cooler evening temperatures. National Climate Overview for December Understanding the general climate pattern across Mexico during December helps set expectations for your trip, as the country's geography creates distinct regional variations.
Temperature Variations by Region Highland Cities and Inland Areas In cities situated at higher elevations, such as Mexico City, San Miguel de Allende, and Guadalajara, December offers some of the most comfortable temperatures of the year. Beach destinations like Cancún, Playa del Carmen, and Puerto Vallarta experience daytime temperatures hovering around 28°C to 30°C (82°F to 86°F), ideal for swimming and water sports.
Mexico December Weather by Region: Coastal Heat vs. Highland Chill
Rainfall and Sunshine Hours December is firmly within the dry season for the vast majority of Mexico, marking the end of the tropical downpours that characterized the summer and early fall. While the highlands and beaches enjoy abundant sunshine, the evenings can carry a crispness that requires a light layer.
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