Butte County UV ForecastUnited StatesSDButte CountyModerate3.1Belle FourcheModerate UV, 3.1Moderate3Castle RockModerate UV, 3ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale