Hot in Dec
31°C average high
avg high · 22° at night
25°C+ on almost every day
Mexico
Cancún weather in December
Is it warm? Yes. December in Cancún is warm: afternoons average 27°C and nights 23°C. Most days (80%) peak between 25°C and 28°C.
Warm · average high
27°C
25°C or more on about nine in ten days; 20°C or more on almost every day.
- Average low23°overnight
- Sea28°average, 2023–2025
- Rainy days972 mm in the month
- SkyOften cloudy46% cloud · 31% clear days
How warm it really gets
Every December afternoon from 2011–2025: 465 days. Most (80%) peaked between 25° and 28°.
December, year by year
The average December high in each year. The warmest, 2025, averaged 28°C; the coolest, 2011, 26°C.
Compared with home
Average December highs. Expect rain on about 9 days (72 mm in a typical month).
- Cancún27°
- Cork10°
- Dublin9°
- London9°
- Belfast8°
- Manchester8°
- Glasgow7°
Warmer in December, not much further
Flying times are estimates from Dublin; Cancún is about 9h 45m.
Hot in Dec
28°C average high
avg high · 25° at night
25°C+ on almost every day
Hot in Dec
29°C average high
avg high · 23° at night
25°C+ on almost every day
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology