The temperatures in Rancagua in December are quite cold with temperatures between 8°C and 27°C, warm clothes are a must.
The wather in Rancagua in December can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Rancagua in December 2025.
If you’re planning to visit Rancagua in the near future, we highly recommend that you review the 14 day weather forecast for Rancagua before you arrive.
Temperatures
27° / 8°
Rainy Days
2
Snowy Days
0
Dry Days
29
Rainfall
25
mm
Sun Hours
11.8
Hrs