No investigations are planned, but David Schug, the winner of the Union-Tribune’s 15th annual Precipitation Prediction Contest, may have had an unfair advantage: His father was a weatherman. Schug predicted San Diego would get 3.5 inches of rain during the 2017-18 rainfall year, which ran from Oct. 1, 2017 to Sunday (Sept. 30). The city’s actual total, as measured at San Diego International Airport, site of the city’s official weather station, was 3.34 inches. It was the second driest year in city history.