Weather in Сан-Педро-де-Атакама by month: what to expect

Сан-Педро-де-Атакама sits in one of the driest deserts on Earth, where clear skies dominate most of the year. The climate here is sharply defined by two distinct periods: a warmer stretch from November to March and a cooler, though still mild, season from April to October. Daytime temperatures often climb above +25 °C in summer, while nights can drop to +3...+6 °C even in the warmer months.

Rainfall in Сан-Педро-де-Атакама is rare, with most months recording less than 10 mm of precipitation. The exception is February, when brief showers occasionally bring around 39 mm—enough to briefly soften the arid landscape. The rest of the year, the air remains dry, with humidity often below 20%, making the heat more tolerable than in more humid climates.

Sunshine is abundant year-round, averaging over 10 hours of daylight even in the shortest days of June and July. The combination of dry air, minimal clouds, and high altitude means UV exposure is intense, so protection is essential regardless of the season.

Temperatures in Сан-Педро-де-Атакама follow a predictable pattern, with warm days and chilly nights. From December to March, daytime highs reach +27...+29 °C, while nights cool to +11...+13 °C. The hottest month, January, sees averages around +20.1 °C, though the desert heat can feel more intense under the midday sun.

By April, temperatures begin to drop, with daytime highs falling to +24.5 °C and nights dipping to +8.7 °C. The coolest months, June and July, bring daytime highs of +19.1...+19.3 °C and nighttime lows near +3 °C. Frost is rare but possible, especially in the early mornings of June and July.

From September, the mercury starts to climb again, with October and November offering pleasant +24...+27 °C during the day and +8...+10 °C at night. The transition between seasons is gradual, with no sudden shifts—just a steady rise or fall in temperatures over weeks.

Сан-Педро-де-Атакама is one of the driest places on the planet, with most months seeing virtually no rain. The only notable exception is February, when occasional showers bring around 39 mm of precipitation. Even then, the rain is usually light and short-lived, often evaporating before it can soak the ground.

From March to January, rainfall is negligible, with many months recording 0 mm. The dry air and lack of clouds contribute to the desert’s stark beauty, but also mean that water sources are scarce. Travelers should carry their own supplies, as the arid conditions persist year-round.

Humidity in Сан-Педро-де-Атакама is consistently low, averaging around 21% annually. The driest months, July and September, see humidity drop below 15%, making the air feel even more parched. The combination of dryness and high altitude can lead to dehydration, so drinking plenty of water is essential, even if the temperatures aren’t extreme.

For a trip to Сан-Педро-де-Атакама, layering is key. During the warmer months of November to March, pack lightweight, breathable clothing for daytime temperatures above +25 °C, but don’t forget a warm layer for nights, which can drop to +10 °C or lower. A wide-brimmed hat, sunglasses, and high-SPF sunscreen are must-haves to protect against the intense desert sun.

In the cooler months of April to October, daytime temperatures are mild, around +19...+24 °C, but nights can be surprisingly cold, especially in June and July, when temperatures hover near +3 °C. A fleece or insulated jacket is essential for early mornings and evenings, along with long pants and closed-toe shoes for comfort.

Regardless of the season, hydration is critical in Сан-Педро-де-Атакама. Carry a reusable water bottle and refill it regularly, as the dry air can lead to dehydration even if you don’t feel thirsty. A scarf or buff can help protect your face from dust and wind, while sturdy footwear is ideal for exploring the rocky terrain.