Acclimatize Slowly
Cusco's altitude (11,152 ft / 3,400 m) can affect anyone. Plan to take it easy for your first day or two, drink plenty of water, and avoid heavy meals and alcohol to help prevent altitude sickness.
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Weather in Cusco in May
Cusco in May is characterized by dry, sunny days and chilly nights, marking the transition into the dry season. Average daytime highs typically reach around 68°F (20°C), while nights can drop to a brisk 37°F (3°C). Rainfall is minimal, with only about 0.3 inches (7mm) expected throughout the month, meaning clear skies are the norm. Humidity levels are generally low, hovering around 40-50%, and you can expect ample daylight, with approximately 11.5 hours of sun per day.
What to wear in Cusco in May
Layering is absolutely key for Cusco in May, as temperatures can fluctuate dramatically between day and night. Think breathable layers that you can easily add or remove to adapt to the changing climate. While there are no strict dress codes, locals tend to dress modestly, so comfortable and respectful clothing is always a good choice.
Essentials for Cusco in May
Wide-brimmed hat
Crucial for protecting your face and neck from the intense Andean sun at high altitude.
UV-protection sunglasses
Essential to shield your eyes from strong UV rays, which are amplified by the altitude.
High-factor sunscreen (SPF 50+)
Absolutely critical to prevent sunburn due to the powerful high-altitude UV radiation.
Comfortable, broken-in hiking boots or sturdy walking shoes
Indispensable for navigating uneven cobblestone streets and ancient Inca trails around Cusco and the Sacred Valley.
Moisturizing lip balm with SPF
Prevents chapped lips from the dry air and sun exposure at high altitudes.
Lightweight, moisture-wicking base layers
Keeps you dry and comfortable during active days while providing warmth under other layers.
Fleece jacket or warm sweater
Provides essential warmth for chilly evenings and early mornings.
Waterproof and windproof outer shell jacket
Offers protection against unexpected light showers and keeps you warm when winds pick up, especially at higher elevations.
Small daypack (20-30L)
Perfect for carrying daily essentials like water, snacks, extra layers, and your camera on excursions.
Reusable water bottle with a filter
Stay hydrated while reducing plastic waste, and the filter ensures safe drinking water from various sources.
Pro tips
Embrace the Layers
Seriously, you'll be putting on and taking off layers constantly. A t-shirt, a fleece, and a waterproof shell will be your best friends as temperatures change throughout the day.
Sun Protection is Non-Negotiable
The high altitude means the sun's UV rays are incredibly strong, even on cloudy days. Always wear sunscreen, a hat, and sunglasses to protect yourself.
Stay Hydrated, Always!
The dry air and altitude can lead to dehydration quickly. Carry a reusable water bottle and refill it frequently to stay well-hydrated throughout your trip.
Frequently asked
Will I experience altitude sickness in Cusco?
It's possible, as Cusco is very high! Symptoms can include headache, nausea, and shortness of breath. The best way to mitigate it is to take it easy your first day, drink lots of water, and avoid alcohol. Consulting your doctor about preventative medication is also a good idea.
Is it cold in Cusco in May?
Nights and early mornings are quite cold, often dropping to around 37°F (3°C). However, days are generally mild and sunny, reaching about 68°F (20°C). Packing warm layers is crucial for comfort.
How much rain should I expect in May?
May is the beginning of the dry season, so you can expect very little rain. On average, there's only about 0.3 inches (7mm) of rainfall throughout the month, meaning mostly clear skies.
What kind of footwear is best for exploring Cusco?
Sturdy, comfortable hiking boots or walking shoes with good ankle support are highly recommended. You'll be walking on uneven cobblestones and potentially ancient trails, so comfort and grip are key.
Do I need to worry about insects or mosquitoes?
In Cusco itself, mosquitoes are not a significant concern due to the altitude. However, if your itinerary includes lower-altitude areas like Machu Picchu or the Amazon, insect repellent will be essential.