Santiago de Chile weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: October – April
What is the weather like in Santiago de Chile in September?
In September, Santiago de Chile is mild: daytime highs average 18 °C, and nights cool down to about 7 °C. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 55 mm. All in all, September is an excellent month for a holiday in Santiago de Chile.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 69 | 81 | 90 |
| Day | 16° | 18° | 21° |
| Night | 5° | 7° | 10° |
| Sun | 5 h | 6 h | 7 h |
| Rain days | 8 | 8 | 6 |
More details for September
- Daylight
- 11 h 50 min07:43 – 19:33
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 9 km/haverage daily peakAll months
- Cloud cover
- 51 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−3America/Santiago
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %45 %
- Few rainy daysweight 30 %73 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Santiago de Chile in September: quick answers
Is Santiago de Chile hot in September?
No. In September, Santiago de Chile is mild: daytime highs average 18 °C and nights drop to about 7 °C.
Does it rain much in Santiago de Chile in September?
Rain falls on about 8 days, adding up to 55 mm.
Santiago de Chile month by month
The whole year in Santiago de ChileAll destinations: ChileWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences