January is one of the coolest months of the year in Cancun, with temperatures rarely dropping below 70°F (21°C) and rarely exceeding 85°F (29°C). The humidity is typically high during this time of year, making it feel even warmer.
Cancun's climate is tropical, with warm weather throughout the year. The summer months (June-September) are the hottest and most humid, while the winter months (December-February) are slightly cooler and drier.