Butte County UV ForecastUnited StatesSDButte CountyVery high9.6Belle FourcheVery high UV, 9.6Very high9.2Castle RockVery high UV, 9.2ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale