Chile Santiago Weather in August — Climate Guide
August in Santiago is moderate
Santiago Weather in August — Quick Answer
As of 2026- Avg temp
- 17° / 5°
- Rainfall
- 55mm · 5 days
- Crowds
- Moderate
As of 2026, Santiago in August averages a high of 17°C and low of 5°C with 55mm of rain over about 5 days. Late winter — gradually milder, still cool and sometimes smoggy. Highs near 17°C/63°F, nights around 5°C/41°F. Warm jacket, sweater, rain jacket. Winter gear for skiing. Layers for the day-night swing.
August is moderate for Santiago.
August begins to loosen winter's grip — days edge milder (highs near 17°C/63°F), rain eases a little, and the worst of the smog starts to lift toward month's end, though grey, hazy stretches remain. Nights stay cold around 5°C/41°F.
Skiing is still strong, especially at higher resorts like Valle Nevado and Portillo with good late-season snow, and the crowds thin after the mid-July school holidays. It's a solid month to combine city and slopes.
Travel score
Santiago August Weather Stats
Avg High
17°C
Avg Low
5°C
Rainy Days
5
55mm total
Sunshine
5.5h
Daily avg
Humidity
73%
comfortable
UV Index
3
Moderate
Wind
9 km/h
Gusts 20
Crowds
Moderate
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
40 μg/m³
PM10
66 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
15°C
Nighttime
3°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 20 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Late ski season with good high-resort snow
- Thinner ski crowds after school holidays
- Smog easing toward month's end
- Quiet, good-value city shoulder
Cons
- Still cold nights and grey days
- Lingering smog on still days
- Variable, transitional weather
- Shorter (if lengthening) daylight
August Events & Festivals
- Late ski season — still good snow at higher resorts
- Smog eases gradually as winter loosens
- First hints of spring late month
- Quieter shoulder of winter
Santiago in August — Full Picture
August begins to loosen winter's grip — days edge milder (highs near 17°C/63°F), rain eases a little, and the worst of the smog starts to lift toward month's end, though grey, hazy stretches remain. Nights stay cold around 5°C/41°F.
Skiing is still strong, especially at higher resorts like Valle Nevado and Portillo with good late-season snow, and the crowds thin after the mid-July school holidays. It's a solid month to combine city and slopes.
In town, August is a quiet shoulder of winter — good value, indoor-friendly, with the first hints of spring (early blossom, longer light) appearing late in the month. The Andes views improve on the clearer post-front days.
Note: it's a transitional month — pack for cold, damp days but expect occasional bright, crisp ones. Smog is less relentless than June-July but can still flare on still days; check the air-quality index.
What to Wear & What to Pack
Late winter — gradually milder, still cool and sometimes smoggy. Highs near 17°C/63°F, nights around 5°C/41°F. Warm jacket, sweater, rain jacket. Winter gear for skiing. Layers for the day-night swing.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
22.7°C
8°C
3.7/mo
Summer (Jun·Jul·Aug)
Current15.7°C
4.3°C
6/mo
Autumn (Sep·Oct·Nov)
22.3°C
9°C
3/mo
Winter (Dec·Jan·Feb)
29°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 August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Santiago?
Santiago in August is moderate. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Santiago in August?
Santiago August averages a high of 17°C and a low of 5°C.
Does it rain much in Santiago in August?
Santiago August averages 55mm of rainfall over about 5 rainy days.
What should I wear in Santiago in August?
Late winter — gradually milder, still cool and sometimes smoggy. Highs near 17°C/63°F, nights around 5°C/41°F. Warm jacket, sweater, rain jacket. Winter gear for skiing. Layers for the day-night swing.
What time are sunrise and sunset in Santiago in August?
Santiago August sunrise is 08:00 and sunset is 18:55, with 10h 55min of daylight.
What's the air quality like in Santiago in August?
Santiago August air quality (AQI) averages 72, rated Moderate. PM2.5 averages 40μg/m³.
What activities are recommended in Santiago in August?
In August, Santiago is great for Late-season Andes skiing, Museums and indoor sights, Wine and pisco bars.
Is August peak season in Santiago?
Santiago August crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Santiago
View Other Months
Planning a August 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.