Warren County is in the humid continental climate region of the United States, as is most of Indiana. Its Köppen climate classification is Dfa, meaning that it is cold, has no dry season, and has a hot summer. From 1971 to 2000, average temperatures in Indiana have ranged from a low of in January to a high of in July, although a record low of was recorded in 1887 and a record high of was recorded in 1936. Average monthly precipitation has ranged from inches in February to inches in May.