Butte County UV ForecastUnited StatesSDButte CountyVery high8.4Belle FourcheVery high UV, 8.4Very high8Castle RockVery high UV, 8ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale