Santiago Weather in September
18.9°C high · 5.9°C low · 31 mm rain · 6.4h sun
Sep is a warm month in Santiago — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 18.9°C |
| Average low | 5.9°C |
| Rainfall | 31 mm |
| Sunshine | 6.4 hours/day |
| Daylight | 11.8 hours |
What to pack in September
Pack a jacket and layers for Santiago in September.
Santiago weather by month
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Frequently asked questions
What is the weather in Santiago in September?
Highs of 18.9°C and lows of 5.9°C, with about 31 mm of rain and 6.4 hours of sunshine per day.
Is September a good time to visit Santiago?
Sep is a warm month in Santiago — not peak season, but a good time to avoid crowds.
What to do in Santiago · Best time to visit Santiago
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.