The highest day temperature in December 2025 was 101°F. The lowest night temperature was 48°F. The average values for day and night temperatures during December were 90.1°F и 56.9°F respectivly.

Almost all days in December are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in December for Rancagua is 0.1 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 4.4 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Rancagua in December is 13.3 hours.