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Rancagua Weather in December
December in Rancagua brings high temperatures, with highs of 26°C (79°F) and nights dropping to 11°C (52°F). Rainfall is very low this month, averaging just 14 mm (0.6 in).
Rainfall in Rancagua in December
Rain is expected on roughly 4 days, totalling around 14 mm (0.6 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.
Temperature in Rancagua in December
December is one of the better months to visit Rancagua. Expect 26°C (79°F) during the day and 11°C (52°F) at night. December is in the summer season. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.If you favor pleasant temperatures and minimal rainfall, December is one of the best months to visit Rancagua.
Rancagua Temperature in December
Min Temperature
11°C (52°F)
Max Temperature
26°C (79°F)
Chance of Rain
12%
Precipitation
14 mm (0.6 in)
Rainy days
4 days
Rancagua Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rancagua - and find the best time to visit.
Historical weather records for Rancagua in December
Browse day-by-day weather records for Rancagua spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Rancagua historical weather extremes in December
Our historical data for Rancagua spans 2004 to 2025, revealing these weather extremes.
- The hottest December day on record in Rancagua reached 36°C (97°F) (December 31, 2025).
- Rancagua experienced its chilliest December day on December 20, 2014, reaching only 12°C (54°F).
- The coldest night in December in Rancagua was on December 1, 2014, with a minimum of 3°C (37°F).
Best Places in Chile in December
Find out more about the weather in Chile and which places have the best travel conditions in this month. See all of Chile in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Rancagua in December
Warm but pleasant conditions in Rancagua in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Dry conditions mean you won't need to worry about rain protection.
What To Do in Rancagua in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
Rancagua 3-Day Forecast
More climate data for Rancagua
See the full Rancagua climate overview or explore weather in Chile.
Popular in December
Where to go in December - average daytime high across popular destinations.
Santiago
26°C (79°F) San Pedro de Atacama
25°C (77°F) La Serena
23°C (73°F) Hanga Roa24°C (75°F) Viña del Mar20°C (68°F) Pucón
19°C (66°F) Valparaíso19°C (66°F) Bucket list
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