Best Time to Hike Ausangate Trek: Weather & Season Guide %currentyear%

The best time to hike the Ausangate Trek and explore the 7 Lagoons is during the Andean dry season, spanning from May to September. During these southern winter months, high-pressure atmospheric systems lock over the Vilcanota Mountain Range, producing crisp mountain air, virtually zero cloud cover, and uninterrupted panoramic views of snow-capped peaks and turquoise glacial tarns. However, this period also brings the coldest nocturnal temperatures of the entire year.

1. Dry Season: May through September (Prime Trekking Window)

If clear blue skies, mirror-like lake reflections, and stellar night astrophotography are your priorities, this is the definitive window to book:

• Daytime Weather: Sunny and dry, with pleasant daytime temperatures hovering between +12°C and +16°C (54°F – 61°F) under strong solar radiation.
• Nighttime Weather: Freezing cold. Because there is no cloud cover to trap heat in the thin atmosphere, temperatures drop swiftly after 5:30 PM, reaching between -5°C and -15°C (5°F) at high camps like Upis and Pucacocha during June, July, and August.
• Trail Surface: Firm, dry gravel and moraine paths, with virtually zero mud on high mountain passes.

2. Shoulder Months: April and October

These transitional months offer an attractive balance for hikers seeking fewer visitors on the trail:

• Conditions: Moderate temperatures (night freezes are less severe, usually -2°C to -5°C) and lush green alpine pastures.
• Rain Risk: Occasional afternoon rain showers or passing hail squalls above 4,800 m. Packing full waterproof storm gear is mandatory.

3. Wet Season: November through March (High Risk Period)

Unlike lower-elevation cultural tours in Cusco or the Sacred Valley, we strongly discourage multi-day backcountry trekking around Ausangate during the heavy rainy season:

• Frequent Alpine Snowstorms: High mountain passes (Arapa, Palomani, Warmisaya) regularly experience blizzards, heavy snow accumulation, and zero-visibility whiteouts.
• Trail Hazards: Glacial moraines become slick with freezing slush and mud, increasing the risk of slips and altitude distress.
• 1-Day Excursion Alternative: The 1-Day 7 Lagoons loop from Pacchanta remains open on clear forecast mornings throughout rainy season, though cloud cover often obscures the upper ice walls of Mount Ausangate.