Machalí, Chile in December has warm conditions, with highs averaging 26.7°C (80°F). Rain is rare, falling on about 2 days this month. Temperatures drop noticeably between day and night.
This month falls at the beginning of Summer.
Daily highs in December gradually rise from around 25°C (78°F) at the start to 28°C (82°F) by month's end.
Rainfall is heaviest during the last third of the month, while the middle tends to be drier.
The warmest days tend to fall around the 23th, averaging 28°C (82°F).