Butte County UV ForecastUnited StatesSDButte CountyHigh7.3Belle FourcheHigh UV, 7.3Moderate5.6Castle RockModerate UV, 5.6ArpanBelle FourcheBelle Fourche Municipal AirportBelle Fourche National Wildlife RefugeBelle Fourche ReservoirCastle RockFruitdaleGuidinger ReservoirHerman ParkHighland ParkHooverNewellNewell LakeNislandRocky Point Recreation AreaVale