Summer temperatures · Ohio
How hot does Dayton get in summer?
Dayton right now
43°FClear skies
- Today46°F / 42°FClouds
- Tomorrow45°F / 40°FClouds
- Monday48°F / 35°FClouds
Sky's showing off.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, Dayton averages highs around 84°F and lows around 64°F.
About 16 days a year reach 90°F or hotter, and a day at 100°F comes along less than once a year. About 93 days a year get to 80°F or warmer. That makes it the 63rd hottest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 46°F.
Dayton averages about 16 days a year at 90°F or hotter, so it spends most of summer pleasantly warm and only now and then startled.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 84°F |
|---|---|
| Average summer low | 64°F |
| Days a year at 80°F or warmer | 93 |
| Days a year at 90°F or hotter | 16 |
| Days a year at 100°F or hotter | fewer than one |
| Average winter high, for comparison | 40°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Cincinnati, Ohio: highs around 85°F, lows around 64°F
- Indianapolis, Indiana: highs around 84°F, lows around 65°F
- Sacramento, California: highs around 91°F, lows around 58°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00093815.