Mono Mills, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Mono Mills, California, United States, is known for its proximity to Mono Lake and the Mono Basin Scenic Area. The best time to travel to Mono Mills, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and nearby lake water temperatures are typically in the 60s°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!