Weather in Куско by month: what to expect

Куско sits high in the Andes, where the weather follows a clear rhythm of wet and dry seasons. From November to March, the city sees frequent rain, with January and February being the wettest months. The air stays mild, but downpours can disrupt outdoor plans. By April, the rains ease, and Куско enters its dry season, lasting through September. These months bring crisp mornings and warm afternoons, ideal for exploring ruins or hiking nearby trails.

The transition months—October and April—offer a mix of conditions. October can still feel damp, while April marks the shift from dry to wet. Nights in Куско are always cool, even in the warmest months, so layers are key year-round. The city’s elevation means temperatures rarely feel extreme, but the contrast between day and night can be noticeable, especially in June and July.

Daytime temperatures in Куско hover between +18 °C and +22 °C for most of the year, with little variation. The warmest months are September and October, when highs reach +21.9 °C, while June and July are the coolest, with averages around +11.1 °C. Even in the dry season, nights can drop to +1.4 °C in July, so a warm layer is essential after sunset.

The biggest temperature swings occur between May and August. While afternoons may feel pleasant at +20 °C, mornings can start near 0 °C, especially in June. By November, the mercury climbs slightly, with nights staying above +8 °C. Travelers should note that Куско’s high altitude amplifies the chill, making even mild temperatures feel cooler than the numbers suggest.

Куско’s rainfall is heavily seasonal, with over 80% of its annual precipitation falling between November and March. January is the wettest month, averaging 200.6 mm, while June and July see almost no rain, with just 5.3 mm and 6.9 mm respectively. During the wet season, afternoon showers are common, often clearing by evening, but trails and roads can become muddy or slippery.

The dry season, from April to September, offers the most reliable weather for travel. May through August are particularly dry, with rainfall below 30 mm per month. Even in the shoulder months, like October or April, rain is less frequent than in the peak wet season. If you’re planning outdoor activities, the dry months are the best time to visit Куско, though mornings may still bring light mist or drizzle.

For a trip to Куско in the dry season, pack layers to handle the temperature shifts. Mornings and evenings can be chilly, even in July or August, so a fleece or light jacket is useful. During the day, a long-sleeve shirt or light sweater will suffice, as the sun warms the air to +20 °C. A waterproof shell is still a good idea for unexpected drizzle, especially in April or September.

If you’re visiting Куско in the wet season, waterproof gear is a must. A sturdy rain jacket and quick-dry clothing will help you stay comfortable during afternoon downpours. Footwear with good grip is essential, as cobblestone streets and trails can become slick. Even in the rain, temperatures remain mild, so a light sweater or thermal layer for cooler nights is enough. Don’t forget sunscreen—Куско’s altitude means UV exposure is high year-round.