Early summer · Weather & things to do
Valle de Uco in December
Valle de Uco warms up: highs climb to 88°F (31°C), from 83°F in November, with lows of 60°F (16°C) and about 0.8 in (20 mm) of rain.
Its comfort score of 76/100 is still Good, though it ranks 11th of 12 here.
- Avg high
- 88°F (31°C)
- Avg low
- 60°F (16°C)
- Rain
- 0.8 in (20 mm)
- Humidity
- 39%
- Cloud cover
- 54%
- Daylight
- ~14 h 13 min
- Comfort score
- 76/100 · Great
What December feels like
Afternoons run hot at about 88°F (31°C), which leaves mornings and evenings as the time for walking.
There's a big swing between day and night, about 15°C (28°F), so mornings and evenings feel much cooler than the afternoon.
The air is dry, at about 39% humidity, which keeps warmth comfortable but dries skin and lips.
It's one of the drier stretches, with only about 0.8 in (20 mm) of rain.
Plan around December
December is one of the lower-scoring months here; the best are March – May and August – October.
- Longest days of the year, about 14 h 13 min of daylight.
- Comfort slips from 85/100 in November to 76/100.
- Our Buenos Aires, Mendoza & Iguazú route recommends Mar – May, Sep – Nov, so December falls outside its suggested window.
What to pack for December
- Light, breathable clothes88°F afternoons
- Sunscreen, sunglasses and a hatstrong sun this month
- Refillable water bottleeasy to dehydrate in the heat
- A warm layer for eveningsnights drop to 60°F
- Lip balm and moisturizerdry air
- Comfortable walking shoesmost picks involve some walking
What to do in Valle de Uco in December
Afternoons run hot (88°F), so these picks mix early-start outdoor spots with cool indoor breaks.
The Vines of Mendoza
Vineyard estate with Francis Mallmann's Siete Fuegos restaurant and a tasting room.
Why now A break from 88°F afternoons.
Ruta del Vino del Valle de Uco
Scenic drive along Ruta 89 and Ruta 94 between vineyards, poplar rows and Andean peaks.
Why now December scores 76/100 for comfort, good conditions for being outside.
Bodega Andeluna
Gualtallary-area winery with tastings in a modern lodge facing the mountains.
Why now Somewhere to sit out the hottest hours.
Bodega DiamAndes
Winery in the Clos de los Siete project known for Malbec blends and a diamond-shaped facade.
Nearby in December
- Mendoza in December~54 mi · highs 91°F, 1.2 in rain · 2°C (4°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~2,486 m to Valle de Uco's ~983 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Valle de Uco in December: quick answers
Is December a good time to visit Valle de Uco?
It's one of the tougher months here, scoring 76/100, held back mainly by heat. The best months are March – May and August – October. Expect highs of 88°F (31°C) and 0.8 in (20 mm) of rain. Our Buenos Aires, Mendoza & Iguazú route recommends Mar – May, Sep – Nov, so December is outside its suggested window.
How hot is Valle de Uco in December?
Average highs are 88°F (31°C) and average lows 60°F (16°C), making it the 2nd-warmest month by daytime highs.
Does it rain a lot in Valle de Uco in December?
Not much: about 0.8 in (20 mm) of rain falls across December on average, the 4th-driest month of the year. The annual total is about 11.3 in (287 mm).
What should I pack for Valle de Uco in December?
Bring light, breathable clothes (88°F afternoons), sunscreen, sunglasses and a hat (strong sun this month), refillable water bottle (easy to dehydrate in the heat), a warm layer for evenings (nights drop to 60°F) and lip balm and moisturizer (dry air).
More on Valle de Uco
Planning Valle de Uco in December?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.