The weather hardly changes between January and February in Cancun, Mexico when the average temperature is a pleasant 23°C.During this month, lows of 20°C are common, rising up to 28°C at the warmest part of the day.t this time of the year, the resort enjoys nine hours of sunshine each day and an average sea temperature of 26°C, making it a wonderful month to spend a day at the beach. With an average of 14 rainy days throughout the ...