Santiago Weather in December
In December, Santiago averages a high of 30°C (86°F) and a low of 11°C (52°F), from 34 years of daily records (1975–2025).
30°C
Average high
86°F
11°C
Average low
52°F
37°C
Record high
98°F · December 24, 2019
3°C
Record low
38°F · December 11, 1991
What December Is Like in Santiago
- 6 of the 10 warmest Decembers on record in Santiago have come since 2010.
- The coldest December reading, 3°C (38°F) on December 11, 1991, has not been matched in 34 years.
- December in Santiago has become 1.3°C (2.3°F) warmer on average: the 2010–2024 average against 1970–1989.
- A typical December brings 16 days above 30°C (86°F).
At least 1 mm of rain falls on 2% of December days, and the month averages 3 mm in total.
Warmest: 2019 (32.2°C)Latest: 2020 (31.3°C)10-year averageLong-run average (29.8°C)
Look Up a Day in December
See the weather in Santiago on any December date, year by year.
Source: NOAA GHCN-Daily, Arturo Merino Benitez Intl (1973–2025); Quinta Normal (2005–2025). Averages cover 1975–2025. How we compute this