Cancun weather in December
Cancun averages 27°C by day and 22°C at night in December, with the sea at 28°C and about 82 mm of rain in the month.
Day
27°C
Night
22°C
Sea
28°C
Rain
82 mm
Flight from London
10h
What December feels like
December is hot in Cancun: proper beach weather.
The sea is warm at 28°C: comfortable for long swims.
Expect some rainy spells: about 82 mm falls in the month.
That is 18°C warmer than an average December day in London.
Of the 56 sun destinations we track, Cancun is the #22 warmest in December.
Want it warmer in December?
These are hotter than Cancun this month for at most an hour and a half more flying:
Cancun weather by month
December is highlighted. Compare with November and January, or see the full year in Cancun.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 26°C | 22°C | 27°C | 82 mm |
| February | 27°C | 23°C | 27°C | 47 mm |
| March | 28°C | 23°C | 27°C | 37 mm |
| April | 29°C | 24°C | 27°C | 40 mm |
| May | 30°C | 25°C | 27°C | 85 mm |
| June | 30°C | 26°C | 28°C | 197 mm |
| July | 31°C | 26°C | 29°C | 97 mm |
| August | 31°C | 26°C | 29°C | 132 mm |
| September | 31°C | 25°C | 29°C | 180 mm |
| October | 29°C | 25°C | 29°C | 180 mm |
| November | 28°C | 23°C | 29°C | 109 mm |
| December | 27°C | 22°C | 28°C | 82 mm |
Cancun in December: quick answers
Is Cancun hot in December?
December is hot in Cancun: proper beach weather. Average highs are 27°C and lows 22°C.
Can you swim in Cancun in December?
The sea is warm at 28°C: comfortable for long swims.
Does it rain in Cancun in December?
Expect some rainy spells: about 82 mm falls in the month.
What is the warmest month in Cancun?
July, at an average high of 31°C. The coolest is January at 26°C.
How long is the flight to Cancun from the UK?
About 10h direct from London, estimated from the 7,940 km distance. Check your airline for exact times.
Still choosing? See where is hot in December for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in December from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Cancun in December?
Save the restaurants, beaches and views you find on TikTok and Instagram for Cancun straight to a map, then let Dream Trip turn them into a day-by-day plan.
