Planning a trip to Cancun in December? Weather plays a bigger role than you might think. It determines what you pack, which tours make sense, and how you'll spend your days. Some months bring perfect beach weather, others favor jungle adventures or whale watching. December hits the sweet spot with warm days, cool evenings, and minimal rain.
This guide breaks down exactly what to expect from Cancun's weather in December. We'll cover temperatures, rain patterns, ocean conditions, and how all of it affects your plans. By the end, you'll know if December fits what you're looking for and how to make the most of it. December marks the start of dry season and peak tourist time, so you'll get reliable weather but need to plan ahead for popular activities.
What's the Average Temperature in Cancun During December?
December brings some of Cancun's most pleasant temperatures of the year. Daytime highs average 28-29°C (82-84°F), while nighttime lows drop to a comfortable 20-22°C (68-72°F). These temperatures create ideal conditions for both beach relaxation and outdoor adventures. The daily average hovers around 24-25°C (75-77°F), making it one of the coolest months in Cancun's calendar without being cold.
How Hot Does It Get in Cancun in December?
Peak heat in December reaches the low-to-mid 80s°F (around 29°C), which feels comfortable rather than oppressive. The humidity is notably lower than in summer months, sitting at 75-86% compared to the sticky 90%+ you'd experience in August. Morning humidity peaks at 86% but drops to a more manageable 75-78% in the afternoon.
The combination of moderate temperatures and lower humidity means 83°F in December feels much more pleasant than the same temperature would in summer.
Is It Cold in Cancun in December?
Cold weather isn't a concern for most visitors to Cancun in December. While December is technically one of Cancun's "coolest" months, temperatures rarely drop below the high 60s°F (20°C). The only exception comes during rare cold fronts called "nortes" that can occasionally push nighttime temperatures into the low 60s or even upper 50s°F.
These cold snaps are extremely uncommon and usually brief, affecting maybe 2-3 days out of the entire month.
What's the Temperature Like at Night in Cancun in December?
Evenings in December are pleasantly cool, with temperatures settling around 68 to 72°F (20 to 22°C). This creates perfect conditions for outdoor dining, beach walks, and evening activities without the stifling heat of summer nights.
You'll want a light sweater, cardigan, or jacket for comfort, especially if you're dining outdoors or taking evening boat tours. The cooler nights also mean better sleep quality in hotel rooms, even those without strong air conditioning.
Is the Water Warm Enough to Swim in December?
The Caribbean Sea remains beautifully warm in December, with temperatures around 26 to 27°C (79 to 81°F). This is perfect for swimming, snorkeling, and diving without any discomfort. The water temperature is actually warmer than many heated pools, so you can spend hours in the ocean without getting cold.
Water sports like kayaking, paddleboarding, and jet skiing are comfortable all day long. You won't need a wetsuit for snorkeling or diving, though some people prefer a thin rash guard for sun protection during extended water activities.
Does It Rain in Cancun in December?
Rain is relatively uncommon in Cancun during December, with only 6-7 rainy days expected throughout the month. When it does rain, showers are typically brief and intense rather than all-day affairs. Most rain in Cancun falls as short tropical downpours, lasting less than an hour, often followed by sunny skies. December marks the beginning of the dry season, so you're much less likely to experience the prolonged rainfall that characterizes the summer months.
How Much Rain Should You Expect in Cancun in December?
December sees approximately 75-90mm (3-3.5 inches) of total rainfall spread across those 6-7 rainy days. This makes it the sixth wettest month of the year, but still quite dry compared to the peak rainy season.
Most showers arrive as sudden, heavy downpours that clear quickly, rather than steady drizzle or all-day rain. The rain usually falls in late afternoon or early evening, rarely disrupting morning beach time or tour departures.
Is December Part of the Rainy Season in Cancun?
December actually marks the end of the rainy season and the beginning of the dry season in Cancun. The official rainy season runs from May through October, with November considered a transitional month before drier conditions begin in December.
This seasonal shift means you'll experience much less rainfall than in preceding months, with more predictable weather patterns. The transition makes December one of the most reliable months for outdoor activities and beach time.
Should You Worry About Storms in Cancun in December?
Storm concerns are minimal in December since hurricane season officially ends in November. There's essentially zero risk of hurricanes or tropical storms during this month. The most severe weather you might encounter would be brief thunderstorms associated with passing cold fronts, but these are typically short-lived and pose no significant threat to travelers. December's weather is among the most stable and predictable of the year, making it ideal for advance tour bookings.
Is It Windy in Cancun in December?
December brings gentle, pleasant breezes rather than strong winds. Average wind speeds hover around 9 mph (13-14 km/h), providing a cooling effect that makes the warm temperatures even more comfortable. These consistent trade winds help moderate the humidity and create ideal conditions for sailing, catamaran tours, and beach activities.
Occasionally, passing weather fronts might bring slightly stronger winds, but they rarely affect water activities or beach enjoyment significantly.
What Wildlife Shows Up in Cancun in December?
December is excellent for birdwatching, as many migratory species winter in the Yucatan Peninsula. You'll spot flamingos, toucans, parrots, herons, and hundreds of other bird species in reserves like Sian Ka'an and Isla Contoy.
Marine life remains active with sea turtles (adults) visible on reefs, along with colorful fish, rays, and nurse sharks. However, December falls outside whale shark season (June-September) and peak turtle nesting (May-October), so you'll miss those specific encounters but gain access to incredible birding opportunities.
Does the Weather Affect Tours in Cancun During December?
December's reliable weather creates optimal tour conditions with minimal cancellations due to weather. The dry season means jungle tours, cenote swimming, and archaeological site visits operate on full schedules.
Water-based activities like snorkeling, diving, and catamaran cruises run smoothly thanks to calm seas and clear skies. However, December is peak tourist season, especially around Christmas and New Year's, so popular tours fill up quickly and prices increase. Book early to secure spots, as demand is high rather than weather being a limiting factor.
What to Bring for Cancun in December
Weather determines everything you pack. December's conditions in Cancun mean you'll want specific gear to stay comfortable and make the most of your trip. From the right clothing for the temperature to protection from rain or sun, packing smart makes a difference.
Pack lightweight, breathable clothing for warm days and a light sweater or jacket for cooler evenings. Bring reef-safe sunscreen, as the sun remains intense even in winter. A compact rain jacket or poncho handles occasional showers, while comfortable walking shoes work for archaeological sites and jungle tours.
For a complete breakdown of exactly what to bring, check out our detailed guide: What to Pack for Cancun in December.
Best Things to Do in Cancun in December
December brings specific advantages to Cancun. Some activities shine during this time of year thanks to the weather, wildlife, or seasonal conditions. Whether you're after water sports, cultural experiences, or outdoor adventures, knowing what works best in December helps you plan smarter.
The perfect weather makes this ideal for cenote swimming, Mayan ruin exploration, and jungle adventures. Birdwatching peaks with migratory species, while calm seas create excellent conditions for snorkeling and diving. The holiday season also brings festive events and celebrations throughout the region.
We've put together a full guide covering the top experiences: Things to Do in Cancun in December.
Our Top Pick to Enjoy the Best of Cancun: Luxury Sunset Sailing Cancun
December's ideal weather creates the perfect backdrop for this unforgettable sailing experience. Aboard a luxurious French-made catamaran, you'll glide along Cancun's stunning coastline as the December sky transforms into a canvas of vibrant colors. The month's lower humidity means clearer horizons and more spectacular sunset views than summer months offer.
Enjoy the fully stocked open bar and gourmet appetizers as you sail on calm December waters. Our expert crew times departure perfectly to align with December's earlier sunset times, ensuring you experience the most vivid colors over the Caribbean.
The tour includes convenient round-trip transportation from most Cancun hotels, professional bilingual guides, and all food and drinks—just bring a light jacket for those comfortable December evening breezes. This sailing experience offers the perfect balance of luxury and natural beauty, showcasing why December is one of Cancun's most magical months.
You're Ready for Cancun in December
Now you know what Cancun weather looks like in December. You can plan around the temperatures, prepare for rain if needed, and time your activities to match the conditions. Whether you're here for the ocean, the wildlife, or the adventures, December has something worth experiencing. The reliable weather, combined with festive holiday atmosphere, makes it one of the year's best times to visit.
Ready to make it happen? Browse our full selection of Cancun tours and find the experiences that fit your travel style. The best tours fill up fast, especially during popular months, so book ahead and show up ready. December's perfect weather means you'll get the most out of every adventure, from sunrise cenote swims to sunset catamaran cruises.
