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.
| Month | Day Temp (°C) | Night Temp (°C) | Rainfall | Trekking Rating |
|---|---|---|---|---|
| May | +14°C | -5°C | Very Low | Excellent (Clear & Fresh) |
| June – August | +13°C | -10°C to -15°C | Minimal | Peak Season (Cold Nights) |
| September – October | +15°C | -4°C | Low / Moderate | Very Good |
| November – March | +12°C | 0°C to -2°C | High (Snow on Passes) | Not Recommended (Multi-Day) |
Explore Mount Ausangate & Pristine Glacier Lagoons
Trek over 4,300 meters above sea level with WAFA-certified wilderness guides, emergency oxygen in van, and relaxing hot springs in Pacchanta.
