Weather on December 18 in Santiago
Historical weather data for December 18 in Santiago, Chile
Avg High29°C (84°F)
Avg Low11°C (52°F)
Warmest202526°C
Coldest198014°C
Based on 48 years of data from QUINTA NORMAL
About This Date
December 18th in Santiago, Chile typically brings warm winter weather, with average highs around 29°C and lows near 11°C — a 32°F daily swing. Over 48 years of records, the warmest December 18th was in 2025 (26°C average), while the coldest was 1980 (14°C) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 2% of December 18th dates historically.
Planning for December 18th in Santiago? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 30°C (86°F) | 22°C (71°F) | -- |
| 2024 | 28°C (83°F) | -- | 0 mm |
| 2023 | -- | 9°C (49°F) | 0 mm |
| 2022 | -- | 11°C (52°F) | 0 mm |
| 2021 | -- | 12°C (53°F) | 0 mm |
| 2020 | 31°C (88°F) | 11°C (52°F) | 0 mm |
| 2019 | 33°C (92°F) | 14°C (57°F) | 0 mm |
| 2018 | -- | 13°C (55°F) | 0 mm |
| 2017 | 32°C (90°F) | 13°C (55°F) | 0 mm |
| 2014 | 30°C (86°F) | 12°C (53°F) | 0 mm |
| 2013 | 31°C (87°F) | 12°C (54°F) | 0 mm |
| 2012 | 28°C (83°F) | 13°C (56°F) | 0 mm |
| 2010 | -- | 10°C (50°F) | 0 mm |
| 2009 | 31°C (87°F) | 14°C (58°F) | 0 mm |
| 2008 | 29°C (84°F) | 13°C (55°F) | 0 mm |
| 2007 | -- | 13°C (56°F) | 0 mm |
| 2006 | 28°C (82°F) | 11°C (51°F) | -- |
| 2005 | 31°C (87°F) | 12°C (53°F) | -- |
| 2003 | 33°C (91°F) | 10°C (50°F) | 0 mm |
| 2002 | 29°C (84°F) | 9°C (49°F) | 0 mm |
| 2001 | 32°C (90°F) | 15°C (59°F) | -- |
| 2000 | 32°C (90°F) | 13°C (55°F) | -- |
| 1999 | 27°C (80°F) | 11°C (51°F) | 0 mm |
| 1998 | 29°C (85°F) | 11°C (51°F) | 0 mm |
| 1997 | -- | 9°C (48°F) | 0 mm |
| 1996 | 32°C (90°F) | 9°C (49°F) | 0 mm |
| 1995 | 30°C (86°F) | 13°C (55°F) | 0 mm |
| 1994 | -- | 10°C (50°F) | 0 mm |
| 1993 | 28°C (82°F) | 12°C (53°F) | 0 mm |
| 1992 | 29°C (84°F) | 9°C (49°F) | 0 mm |
| 1991 | -- | 9°C (48°F) | -- |
| 1990 | -- | 10°C (50°F) | 0 mm |
| 1989 | -- | 10°C (50°F) | -- |
| 1988 | 24°C (76°F) | 9°C (49°F) | 0 mm |
| 1987 | -- | 8°C (46°F) | 0 mm |
| 1986 | 31°C (88°F) | 13°C (55°F) | 0 mm |
| 1984 | 30°C (86°F) | 11°C (51°F) | 0 mm |
| 1983 | 28°C (83°F) | -- | -- |
| 1982 | -- | 7°C (44°F) | -- |
| 1981 | -- | 7°C (45°F) | 0 mm |
| 1980 | 24°C (75°F) | 5°C (41°F) | 5 mm |
| 1979 | -- | 10°C (50°F) | 0 mm |
| 1978 | 26°C (79°F) | 10°C (50°F) | 0 mm |
| 1977 | 25°C (77°F) | 15°C (59°F) | 0 mm |
| 1976 | 24°C (75°F) | 14°C (57°F) | 0 mm |
| 1975 | 27°C (81°F) | 9°C (48°F) | -- |
| 1974 | -- | 13°C (55°F) | -- |
| 1973 | -- | 12°C (54°F) | 0 mm |