The weather in Cozumel is very steady. From July to August, the temperatures range from high 80's to low 90's°F or 32°C, while from December to January the temperatures average at mid 70's°F or 24°C. Water temperatures are around 77° to 84°F or 25° to 29°C throughout the year.
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Get Your Best Cozumel Travel Deal - Click Here