 About 12.8% of families and 13.3% of the population were below the poverty line, including 24.3% of those under age 18 and 7.1% of those age 65 or over.This climatic region has large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters.According to the Köppen Climate Classification system, Thompsonville has a humid continental climate, abbreviated "Dfb" on climate maps.