Chile Santiago Weather in December — Climate Guide
December in Santiago is high
Santiago Weather in December — Quick Answer
As of 2026- Avg temp
- 28° / 11°
- Rainfall
- 3mm · 1 days
- Crowds
- Busy
As of 2026, Santiago in December averages a high of 28°C and low of 11°C with 3mm of rain over about 1 days. Early summer — hot and dry. Highs near 28°C/82°F, nights around 11°C/52°F. Light, breathable clothing, sunglasses, a hat, SPF 50+. A light layer for cool evenings and the Andes air.
December is high for Santiago.
December brings summer back — hot, dry, sunny days near 28°C/82°F, cool nights around 11°C/52°F, and the clean, smog-free air of the warm months with crisp Andes views.
It's a festive, lively month leading into the holidays. Christmas (Dec 25) and New Year (Dec 31) are family holidays — expect some closures on the days themselves, festive markets and energy beforehand, and big New Year's Eve fireworks, famously along the Valparaíso bay (a major coastal event).
Travel score
Santiago December Weather Stats
Avg High
28°C
Avg Low
11°C
Rainy Days
1
3mm total
Sunshine
10.5h
Daily avg
Humidity
47%
dry
UV Index
11
Extreme
Wind
13 km/h
Gusts 26
Crowds
Busy
At attractions
December Sunrise & Sunset
Air Quality
PM2.5
16 μg/m³
PM10
31 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
29°C
Nighttime
11°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 26 km/h
Activities Recommended for December
December Travel Pros & Cons
Pros
- Hot, dry, clear with clean air
- Festive holiday season and NYE fireworks
- Andes day-trip & hot-springs season
- Sharp Cerro San Cristóbal & Sky Costanera views
Cons
- Extreme midday UV and heat
- Prices climbing to the summer peak
- Some closures on Dec 25 & Dec 31/Jan 1
- Coast packed for New Year
December Events & Festivals
- Summer arrives — hot, dry, clear, clean air
- Christmas (Dec 25) & New Year (Dec 31) — local holidays, festive, some closures
- New Year's Eve fireworks (notably on the Valparaíso coast)
- Andes day-trip & hot-springs season; summer-travel ramp-up
Santiago in December — Full Picture
December brings summer back — hot, dry, sunny days near 28°C/82°F, cool nights around 11°C/52°F, and the clean, smog-free air of the warm months with crisp Andes views.
It's a festive, lively month leading into the holidays. Christmas (Dec 25) and New Year (Dec 31) are family holidays — expect some closures on the days themselves, festive markets and energy beforehand, and big New Year's Eve fireworks, famously along the Valparaíso bay (a major coastal event).
The Andes day trips are back in full swing — Cajón del Maipo hiking, the Embalse del Yeso, and the Termas Valle de Colina hot springs — and the wine valleys are warm and green. Sky Costanera and Cerro San Cristóbal reward the clear skies.
Note: prices climb toward the summer/holiday peak, and the coast fills up for New Year. The midday sun and altitude push UV to extreme, so sun protection and water are essential for the exposed Centro and hilltop sights.
What to Wear & What to Pack
Early summer — hot and dry. Highs near 28°C/82°F, nights around 11°C/52°F. Light, breathable clothing, sunglasses, a hat, SPF 50+. A light layer for cool evenings and the Andes air.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
22.7°C
8°C
3.7/mo
Summer (Jun·Jul·Aug)
15.7°C
4.3°C
6/mo
Autumn (Sep·Oct·Nov)
22.3°C
9°C
3/mo
Winter (Dec·Jan·Feb)
Current29°C
11.3°C
1/mo
Santiago Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 30° | 12° | 1d·1mm | 11h | 45% | 11 | Busy | Peak | |
| 29° | 11° | 1d·2mm | 10.5h | 47% | 11 | Busy | Peak | |
| March (Best) | 27° | 10° | 2d·5mm | 9h | 52% | 8 | Moderate | Shoulder |
| 23° | 8° | 3d·15mm | 7h | 58% | 6 | Moderate | Shoulder | |
| 18° | 6° | 6d·65mm | 5h | 70% | 4 | Quiet | Low season | |
| 15° | 4° | 7d·80mm | 4h | 78% | 2 | Quiet | Shoulder | |
| 15° | 4° | 6d·75mm | 4.5h | 78% | 2 | Moderate | Shoulder | |
| 17° | 5° | 5d·55mm | 5.5h | 73% | 3 | Moderate | Shoulder | |
| September (Best) | 19° | 7° | 4d·30mm | 6.5h | 65% | 6 | Busy | Peak |
| October (Best) | 22° | 9° | 3d·15mm | 8h | 58% | 8 | Busy | Shoulder |
| November (Best) | 26° | 11° | 2d·8mm | 9.5h | 50% | 10 | Busy | Shoulder |
| 28° | 11° | 1d·3mm | 10.5h | 47% | 11 | Busy | Peak |
View Other Months
Santiago December Hotel Picks
Frequently Asked Questions
Is December a good time to visit Santiago?
Santiago in December is high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Santiago in December?
Santiago December averages a high of 28°C and a low of 11°C.
Does it rain much in Santiago in December?
Santiago December averages 3mm of rainfall over about 1 rainy days.
What should I wear in Santiago in December?
Early summer — hot and dry. Highs near 28°C/82°F, nights around 11°C/52°F. Light, breathable clothing, sunglasses, a hat, SPF 50+. A light layer for cool evenings and the Andes air.
What time are sunrise and sunset in Santiago in December?
Santiago December sunrise is 06:30 and sunset is 20:50, with 14h 20min of daylight.
What's the air quality like in Santiago in December?
Santiago December air quality (AQI) averages 42, rated Good. PM2.5 averages 16μg/m³.
What activities are recommended in Santiago in December?
In December, Santiago is great for Cajón del Maipo & hot springs, New Year's Eve fireworks (coast), Clear Andes views from the city.
Is December peak season in Santiago?
Santiago December crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Santiago
View Other Months
Planning a December trip to Santiago?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.