Butte County UV ForecastUnited StatesSDButte CountyHigh7.4Belle FourcheHigh UV, 7.4High6.7Castle RockHigh UV, 6.7ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale