Cancun Weather In December 2025. Average high temperature in cancun in december: Expect cancún december temperature around 27°c (81°f).

Cancún’s prevailing weather in december includes a maximum temperature of 26.9°c (80.4°f), a minimum dipping to 23.5°c (74.3°f), and an accumulated rainfall of 63mm (2.48) over an approximate 20.7 days. Best time to visit cancun runs from december through early march.