Weather for Fankboner Lake, IN - Fankboner Lake, IN Weather, Current Weather in Fankboner Lake, IN. Local weather report for Fankboner Lake, IN, Local Fankboner Lake, IN weather. Forecast for Fankboner Lake, Indiana, Fankboner Lake, IN weather forecast. Find your local Fankboner Lake weather forecast. Fankboner Lake, IN weather conditions.