May – October are the best time to visit Sacred Valley on the climate data: August scores 95/100, with highs around 64°F (18°C) and 0.3 in (8 mm) of rain. April and November are good shoulder-season months. The toughest months are December – February, mainly because of cloud cover.
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~3,740 m (12,271 ft) to Sacred Valley's ~3,210 m (10,532 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
How we pick the best months
Temperature (40 pts): full marks for average daytime highs of 64–81°F (18–27°C); minus 3 points per °C below and 4 per °C above.
Rain (25 pts): full marks up to 40 mm (1.6 in) a month, falling to zero at 250 mm (9.8 in).
Humidity (15 pts): only counts when it is warm (mean above 18°C); minus 0.75 points per % above 70% relative humidity.
Cloud (20 pts): full marks at 30% cloud cover or less, falling to zero at 90%.
Best months: within 6 points of the top (or 85+). Shoulder: within 18 and at least 45. Toughest: within 6 of the lowest. Comfort only; crowds, prices, festivals and openings aren't scored.
Sacred Valley season by season
Temperatures barely move through the year in Sacred Valley (highs stay between 62°F and 65°F), so rain is what really separates the seasons.
Drier months Apr – Sep
Temperatures hold fairly even, with highs of 62–64°F (17–18°C). It's the driest half, with only about 3.7 in (94 mm) of rain, 13% of the year's total. Comfort peaks here: May – September rank with the year's best, and the season averages 91/100.
Wetter months Oct – Mar
Expect steady highs of 62–65°F (17–18°C). It's the wettest half, with about 24.6 in (624 mm) of rain, 87% of the year's total. Lows bottom out around 44°F (6°C). October is among the best-scoring months (season average 75/100).
What our curated routes say
Our curated Cusco & Machu Picchu route recommends May – Sep. That lines up with the climate data here: May – September are among the better-scoring months.
Plan by month
By comfort score: 8 Great and 4 Good. Great months: April – November. Tap a month for its own guide.
May – October are the best time to visit Sacred Valley on the climate data: August scores 95/100, with highs around 64°F (18°C) and 0.3 in (8 mm) of rain. April and November are good shoulder-season months. The toughest months are December – February, mainly because of cloud cover.
What is the rainiest month in Sacred Valley?
December is the wettest month, averaging about 5.4 in (137 mm) of rain. June is the driest, with about 0.2 in (4 mm). The yearly total is around 28.3 in (718 mm).
What is the coldest month in Sacred Valley?
July is the coldest, with average lows of 40°F (4°C) and highs of 62°F (17°C). The warmest is November, with average highs of 65°F (18°C).
Is Sacred Valley humid?
Not especially for the tropics: humidity averages 79% over the year, and no month pairs warm temperatures with 75%+ humidity.
Does it get below freezing in Sacred Valley?
Not on average: even in July, the coldest month, lows average 40°F (4°C). Individual cold snaps can still dip lower.