Rancagua Weather in December
What's the weather like in Rancagua (O'Higgins) in December 2025?
The climate in Rancagua during December can be summarized as warm and very dry.
December is in the summer in Rancagua and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 25°C (77°F), whilst at night 12°C (54°F) is normal.
| Daytime temperature | 25.2°C 77.4°F |
|---|---|
| Nightly temperature | 12.2°C 54°F |
| Average temperature | 18.7°C 65.7°F |
| Daily sunshine | 11.2 hrs |
| Avg rainfall | 6 mm 0.2 ins |
| Rainy days | 4 days |
| Sea temperature | 16.1°C 61°F |
| Humidity | 63% |
| Windspeed | 8.6kph 5 mph |
On average December is the 3rd driest month of the year in Rancagua with around 6mm 0.2 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 11.2 hours of sunshine per day.
December temperatures in Rancagua
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Rancagua in December 2025.
Other monthly averages
Best places to visit in December
Rancagua weather stats
| Hottest month: | January | 26.5°C 79.7°F |
|---|---|---|
| Driest month: | February | 1mm 0ins |
| Sunniest month: | January | 11.5hrs |
| Coldest month: | July | 12.5°C 54.5°F |
| Wettest month: | July | 126mm 5ins |
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