Weather for Willard Bay State Park, UT - Willard Bay State Park, UT Weather, Current Weather in Willard Bay State Park, UT. Local weather report for Willard Bay State Park, UT, Local Willard Bay State Park, UT weather. Forecast for Willard Bay State Park, Utah, Willard Bay State Park, UT weather forecast. Find your local Willard Bay State Park weather forecast. Willard Bay State Park, UT weather conditions.