Weather in Santiago in September
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn September, Santiago sees average highs of 18.2°C (64.8°F) and lows of 8.4°C. Conditions are pleasantly mild and mostly dry with only occasional showers, with roughly 8.9 hours of sunshine a day. It is one of the best months of the year to visit. For the complete picture, see the best time to visit Santiago — every month compared. Once you know when to go, find your Santiago packing list at 247PackingList.
Get ready for Santiago in September
Search flights to Santiago
Compare 100+ airlines for September — one search, best price.
Search Flights →Hot-weather travel clothing
Sun protection, lightweight layers and a reusable water bottle are essential here.
Check Price →What to pack for Santiago in September
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
Compare all months in Santiago
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 29.7°C | 18.3mm | 10/10 |
| February | 29.6°C | 3.2mm | 10/10 |
| March | 28.3°C | 2.3mm | 10/10 |
| April | 24.0°C | 20.4mm | 10/10 |
| May | 19.7°C | 13.2mm | 10/10 |
| June | 15.5°C | 82.8mm | 10/10 |
| July | 15.1°C | 61.5mm | 10/10 |
| August | 16.4°C | 74.3mm | 10/10 |
| September | 18.2°C | 37.8mm | 10/10 |
| October | 22.6°C | 13.4mm | 10/10 |
| November | 25.8°C | 10.8mm | 10/10 |
| December | 29.2°C | 2.4mm | 10/10 |
Full month-by-month guide: best time to visit Santiago →
For facts about Chile — currency, language and dialling code — see our Chile country guide at 247CountryInfo. Travellers also find it useful to keep a Santiago travel guide to hand. Check clothing sizes in Chile before you shop.
Frequently Asked Questions
Is September a good time to visit Santiago?
September rates 10/10 for visiting Santiago — excellent time to visit. Expect average highs of 18.2°C, 37.8mm of rain across the month and about 8.9 hours of daily sunshine.
What is the temperature in Santiago in September?
In September, Santiago has average highs of 18.2°C (64.8°F) and average lows of 8.4°C (47.1°F).
Does it rain in Santiago in September?
Not much. September averages just 37.8mm of rain in Santiago — the odd shower is possible but most days stay dry.
What should I wear in Santiago in September?
For Santiago in September (18.2°C highs / 8.4°C lows), pack warm layers plus light jacket or fleece, comfortable walking shoes.
More essentials for Santiago in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.