Mundelein, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mundelein is known for its scenic parks and recreational facilities. The best time to travel to Mundelein, United States, is during late spring to early fall (May to September) when the average air temperature ranges from 60°F to 80°F, and water temperatures in nearby lakes are typically between 60°F and 75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!