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. 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 Evening Jacket Needed: What to Wear When Temperatures Drop
Daytime highs typically range from 22°C to 26°C (72°F to 79°F), providing a gentle warmth that is perfect for walking tours and visiting plazas. It is common for many regions to see little to no rainfall for the entire month, resulting in clear blue skies that persist for most of the day.
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. While the highlands and beaches enjoy abundant sunshine, the evenings can carry a crispness that requires a light layer.
Evening Jacket Essentials for Mexico in December
While the ocean temperature on the Caribbean side may be slightly cooler, it remains inviting, and the humidity is far more manageable than during the summer months. 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.
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