December marks the beginning of summer in Peru. Due to the country’s great geographical diversity coast, high Andes (Sierra), and Amazon rainforest, this is not the case for all regions. The climate varies considerably depending on where you go.
In this guide, we will break down what December looks like in every region of Peru, from the coast and highlands to the Amazon rainforest. You’ll find helpful tips on where to travel, what to wear, and how to plan around the weather so you can make the most of your trip.
Whether you’re heading to Machu Picchu, Lima, Cusco, or the jungle, this article will give you clear, reliable answers based on real data
What to Expect from Peru Weather in December
December is the beginning of summer in Peru, but the weather is not the same in all regions. It is summer, but mainly in the coastal areas of Peru. The climate varies considerably depending on where you are.
Machu Picchu Weather in December
On the coast, the weather is warm and sunny, and it hardly ever rains. In the highlands, December is the start of the rainy season, with more clouds and showers in the afternoon but also lush, green landscapes. In the Amazon rainforest, temperatures rise, humidity increases, and torrential rains become more frequent.
Climate by Region in December:
The coast (Costa)
Along the Peruvian coast, December feels like summer. In Lima and surrounding towns, daytime highs reach around 23–25°C (73–77°F), while nights are mild at 17–19°C (62–66°F). Rainfall is almost nonexistent. December averages less than 15 mm of precipitation, and actual rainy days are rare.
Skies tend to be clearer compared to the winter months, and beaches become more attractive. Humidity is present but not overwhelming. It’s an excellent time for seaside strolls and swimming, especially in northern Peru where water temperatures are warmer.
The Andes (Sierra)
In high-altitude regions such as Cusco, the Sacred Valley, and Machu Picchu, December marks the beginning of the rainy season. Daytime temperatures typically range between 65-68°F (18-20°C), but nights are cold, often dropping to 41-46°F (5-8°C).
Rainfall is more frequent, especially in the afternoons. Rain can be heavy, and trails may be muddy or slippery. Clouds tend to build up after midday, so mornings often offer the best opportunities for clear views of the mountains and ruins. Despite the rain, the landscapes are greener and less crowded compared to the dry season.
The Amazon (Rainforest)
The Amazon region, including Iquitos and Puerto Maldonado, is warm and humid in December. Daytime highs range from 86 to 90°C (30 to 32°C), and nights are warm, with temperatures between 71 and 75°C (22 and 24°C). This is the beginning of the wet season, with heavy and frequent rains and very high humidity.
The rivers rise, which can make it easier to reach jungle lodges by boat, and the forest looks incredibly lush. Wildlife remains active, but be prepared for mosquitoes, humidity, and muddy trails.
Weather in Popular Destinations in December:
lima
Lima has pleasant summer weather with highs between 73 and 77°F and warm nights around 64°F. Rainfall is negligible, making it an ideal place to stroll around Miraflores or Barranco and spend time by the sea. The beaches come alive as locals and travelers enjoy the start of the warm season. The beaches come alive as locals and travelers enjoy the start of the warm season.
Cusco
In Cusco, daytime temperatures range around 17-20°C, with cold nights dropping to 5-8°C. December soemtimes can bring more rainy days, although last year it didn’t rain as much as expected, so it’s advisable to bring waterproof clothing just in case. Mornings can be clearer, giving you the opportunity to explore before the afternoon rains arrive.
Machu Picchu
In Machu Picchu, the December weather is similar to that of Cusco, but slightly more humid as Machu Picchu is located close to the jungle of Peru. Rain and fog are common, especially in the afternoon, which can limit visibility of the iconic views. It is recommended to visit early in the morning to enjoy better conditions. The trails can be slippery, so it is essential to wear appropriate footwear.
Arequipa
Arequipa remains relatively mild and dry in December, with daytime highs around 68°F (20°C) and cooler nights. Rainfall is scarce compared to Cusco or Puno, and skies are usually clear, making it one of the most reliable destinations for travel in December.
Iquitos and the Amazon
December in Iquitos is hot, rain y, and humid. Temperatures are around 86–90°F during the day, with frequent heavy rains. Despite the humid conditions, it is a spectacular time to enjoy the jungle, with swollen rivers and lush green landscapes.
Pros and Cons of Visiting Peru in December
Pros:
- The landscapes are green and vibrant in the Andes and the Amazon.
- There are fewer people at major tourist attractions, such as Machu Picchu, especially in early December.
- The coastal climate is excellent for enjoying beaches and outdoor activities.
- Christmas traditions and local festivals add cultural richness.
Cons:
- Rainfall in the Andes and Amazon can affect hiking, transportation, and visibility.
- Afternoon clouds can block views of mountains and ruins.
- Remote hiking trails can be more difficult or even dangerous.
- Accommodation prices rise during Christmas and New Year’s.
Tips for Traveling to Peru in December
What to bring:
- Clothing for layering in the Andes: thermal underwear, fleece or light jacket, and a waterproof jacket.
- Rain gear, such as a poncho, a waterproof backpack cover, and sturdy footwear.
- Sun protection: high SPF sunscreen, sunglasses, and a wide-brimmed hat.
- Lightweight, breathable clothing for the jungle, plus insect repellent.
- Swimwear and light clothing for the coast, with a light sweater for the evenings.
Travel planning
- Schedule outdoor activities and excursions early in the day to avoid afternoon rains.
- Keep your itinerary flexible, with alternative indoor activities for rainy days.
- Book flights and hotels in advance if traveling during the Christmas or New Year period.
- Allow time to acclimatize in the Andes and avoid altitude sickness.
The Best Places to Visit in December
Lima and the coast: ideal weather for enjoying city life, cuisine, and beaches.
Arequipa: its mild climate and clear skies make it a safe bet.
The Amazon rainforest: humid but lush, it offers unique experiences and mighty rivers.
Cusco and Machu Picchu: still worth a visit, especially in early December, but be prepared for rain.
Final thoughts:
Is December a good time to travel to Peru? The answer yes! but this depends on your preferences. If you want clear skies and dry trails for hiking, specially if you are planning to do the Classic Inca Trail then the dry season from June to September is best. But if you are drawn to lush landscapes, fewer tourists, and a lively coastal summer, December can be one of the most rewarding months to visit Peru.
If you plan ahead (packing wisely, keeping your itinerary flexible, and booking key services in advance), you can enjoy a trip that combines the beauty of the highlands, the warmth of the coast, and the adventure of the rainforest. Whether strolling along the coast of Lima, exploring the history of Cuzco under misty skies, or venturing into the Amazon
