December in Lima represents the official start of summer in Peru, marking a distinct transition from the cooler, cloudier months that precede it. While travelers from the Northern Hemisphere associate this time with freezing temperatures, Lima experiences its warmest period of the year, characterized by long, sunny days and minimal rainfall. This season transforms the coastal desert landscape, creating ideal conditions for exploring the city’s vibrant culture and Pacific coastline.
Temperature and Climate Overview
The primary characteristic of Lima weather in December is consistent warmth. Daytime temperatures typically hover between 24°C and 28°C (75°F to 82°F), providing a comfortable environment for outdoor activities without the intense heat found in inland regions. Evenings are pleasantly mild, rarely dropping below 18°C (64°F), which allows for dining on terraces and evening strolls. This stability is a direct result of Lima’s unique position within a subtropical desert climate, heavily influenced by the cold Humboldt Current.
Ocean Temperature and Humidity
While the air is warm, the Pacific Ocean remains refreshingly cool, with average water temperatures around 19°C (66°F). This contrast between hot air and cold water creates the famous coastal garúa, a thin morning fog that often burns off by midday. Humidity levels stay high, averaging around 80%, which contributes to the feeling of warmth but is usually mitigated by the steady sea breeze. The combination of sun and sea makes beach visits particularly enjoyable during this month.
Average High: 28°C (82°F)
Average Low: 18°C (64°F)
Average Rainfall: 0.5 mm (trace amounts)
Average Sunshine: 9 hours per day
Sea Temperature: 19°C (66°F)
What to Pack for December
Preparing for Lima in December requires a strategy focused on layering and sun protection. Light, breathable fabrics like linen and cotton are essential for the daytime heat, but a light jacket or cardigan is advisable for the cooler evenings. Since the UV index is very high, packing a high-SPF sunscreen, sunglasses, and a wide-brimmed hat is non-negotiable. Footwear should be comfortable for walking, with sandals being the most practical choice.
Regional Variations Within Lima
It is important to note that Lima is not a uniform city; microclimates vary significantly between districts. The western districts directly on the coast, such as Miraflores and Barranco, experience the full force of the ocean breeze and tend to be slightly cooler. Inland districts like San Isidro and La Molina can feel noticeably warmer and drier. When checking Lima weather forecasts, specifying the district will yield the most accurate results for your plans.
December is arguably the best time to experience Lima’s culinary scene, as the weather encourages dining al fresco. Rooftop bars in Miraflores and the boardwalk in Chorrillos are at their most vibrant during this month. The lack of rain ensures that outdoor seating is always available, allowing visitors to enjoy the city’s world-famous ceviche and pisco sours under the open sky. The sea breeze enhances the flavors, making sunset dinners particularly memorable.
Events and Activities
The summer season brings a flurry of cultural events to Lima’s parks and plazas. December often features open-air concerts, art exhibitions, and food festivals that take advantage of the favorable weather. Families flock to the beaches during the day, while the nightlife districts heat up as the sun sets. Whether you are interested in historical tours or water sports, the pleasant conditions ensure that your itinerary remains uninterrupted by adverse weather.
