Butte County UV ForecastUnited StatesSDButte CountyVery high10.8Belle FourcheVery high UV, 10.8Very high10.5Castle RockVery high UV, 10.5ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale