When you hear "near perfect weather" year round, Cancun Mexico is being talked about! Well known for its semi tropical temperatures, keep in mind extremes variances do occur. While the mean average is 79 degrees F, summer days can reach 95 degrees F. September and October are hurricane season months. Heading out for a full day of fun in the sun? Check a live weather graph for any changes in the forecast. Click here for more weather grafts and satellite views.