Santiago Weather in September
In September, Santiago averages a high of 20°C (68°F) and a low of 7°C (44°F), based on 50 years of historical weather data from QUINTA NORMAL.
20°C
Average high
68°F
7°C
Average low
44°F
32°C
Record high
89°F · 2017
-5°C
Record low
23°F · 1974
What to Expect in Santiago in September
Typical September days in Santiago reach 20°C (68°F) during the afternoon and cool to around 7°C (44°F) overnight. On average, measurable rain falls on about 13% of days this month. Over the past 50 years, September temperatures in Santiago have ranged from a record high of 32°C (2017) down to a record low of -5°C (1974).
For a day-by-day look or other months, see the full Santiago weather history.