Christmas at 80°F. Cozumel Winter Weather Forecast 2016-2017 Cozumel Christmas at 80°F. Cozumel Winter Weather Forecast 2016-2017 Christmas at 80°F. Cozumel Winter Weather Forecast 2016-2017 Christmas at 80°F. Cozumel Winter Weather Forecast 2016-2017 I hope I draw a smile out of your face. The naked truth is we enjoy a terrific warm weather most of the year down here. ...