Dayton, OH Climate

Summary Graph

The summary climate graph for Dayton, OH shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Dayton, OH.


The warmest month in James M Cox Dayton International, Dayton, Ohio is July with an average high temperature of 86.0°F. The hottest day on record was July 8 2012 when the temperature hit 104.0°F. During January the overnight temperature drops to an average of 19.3°F with the lowest temperature of -25.1°F being recorded on January 19 1994.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

8 Jul 2012104°F
26 Jun 1988102°F
16 Jul 1988102°F
18 Aug 1988102°F
28 Jun 2012102°F

The warmest months on average were:

July 201293.4°F
July 198891.8°F
July 201191.7°F
July 197791.2°F
July 198090.1°F

The coldest days on record are:

19 Jan 1994-25.1°F
20 Jan 1985-24.2°F
17 Jan 1977-21.1°F
21 Jan 1984-20°F
23 Dec 1989-20°F

The coldest months on average were:

January 19773°F
February 19786.7°F
December 19899.5°F
February 19799.6°F
February 200710.4°F


The wettest month by average rainfall in Dayton, OH is May with an average of 4.9 inches of rain falling on 13 to 14 days.Although in April it typically rains on more days with 4.4 inches falling in 13 to 14 days. The driest month in Dayton, OH is February with an average of 2.5 inches of rain falling on 7 to 8 days.

Wettest Days

The wettest days on record are:

19 August 19905.8 inches
28 August 19743.6 inches
27 August 19922.9 inches
3 August 19782.8 inches
31 August 20052.6 inches

Wettest Months

The wettest months on record are:

May 197321 inches
March 197319.7 inches
January 197315.7 inches
October 198413.7 inches
June 198011.6 inches

Driest Months

The driest months on record are:

August 19960 inches
February 19780.4 inches
January 19810.4 inches
September 19870.4 inches
February 19870.5 inches