Dayton Average Temperature by Month

This page shows the average temperature in each month of the year in Dayton, Ohio. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Dayton?
In Dayton, Ohio, the warmest month is July, with an average daily high temperature of 84.5 °F and an average low of 65.0 °F.
What's the Coldest Month in Dayton?
In Dayton, Ohio, the coolest month is January, with an average daily high temperature of 35.7 °F and an average low of 20.6 °F.
Month Avg. High Avg. Low
January 35.7 °F 20.6 °F
February 39.7 °F 23.4 °F
March 50.1 °F 31.6 °F
April 63.1 °F 41.8 °F
May 72.8 °F 52.7 °F
June 81.2 °F 61.7 °F
July 84.5 °F 65.0 °F
August 83.2 °F 63.2 °F
September 77.2 °F 55.6 °F
October 64.8 °F 44.7 °F
November 51.4 °F 34.3 °F
December 40.1 °F 26.0 °F
Year 62.1 °F 43.5 °F
Weather Station Details
Years Station Coordinates
1948–2024 Dayton International Airport location
1893–1947 Dayton location