Johnston, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Johnston, Iowa, United States, is known for the Iowa Gold Star Military Museum and the annual Green Days festival. The best time to travel to Johnston, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
