Weather for Blackhawk Island, WI - Blackhawk Island, WI Weather, Current Weather in Blackhawk Island, WI. Local weather report for Blackhawk Island, WI, Local Blackhawk Island, WI weather. Forecast for Blackhawk Island, Wisconsin, Blackhawk Island, WI weather forecast. Find your local Blackhawk Island weather forecast. Blackhawk Island, WI weather conditions.