average temperatures in ohio by month
Home : Climate Graphs: Ohio : Columbus. Average Temperatures for Columbus. Columbus's coldest month is January when the average temperature overnight is 20.3Â°F. In July, the warmest month, the average day time temperature rises to 85.3Â°F. The driest month in Columbus is February with 2.20 inches of precipitation, and with 4.61 inches July is the wettest month.