Butte County UV ForecastUnited StatesSDButte CountyVery high8.3Belle FourcheVery high UV, 8.3Very high8.7Castle RockVery high UV, 8.7ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale