Dayton, OH Weather
Dayton hourly forecast: next 24 hours
Today's high of 93°F (34°C) is about 11°F (6°C) above the typical August high of 82°F (28°C).
Current conditions in detail
Dayton weather tomorrow (Friday, August 7)
Tomorrow in Dayton looks patchy rain nearby, with a high of 86° and an overnight low of 66°. There is a 77% chance of rain - plan accordingly. Winds top out near 8 mph, and the UV index reaches 8 (high).
Dayton 14-day forecast
About the weather in Dayton
Located in Ohio, United States, Dayton experiences a humid subtropical climate with hot, humid summers and generally mild winters. Afternoon temperatures peak near 84°F (29°C) in July and dip to about 38°F (3°C) in January, with around 44.6 inches (1134 mm) of precipitation falling across the year.
Dayton weather: quick facts
- Hottest month: July - highs near 84°F (29°C)
- Coldest month: January - highs near 38°F (3°C)
- Record high: 95°F (35°C) · Record low: -17°F (-27°C) (2015–2024)
- Wettest month: May (14 rainy days) · Sunniest: July (11.8 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
- Snow: about 12 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 84°F (29°C) and overnight lows stay near 67°F (20°C). The coolest month is January, with typical highs of 38°F (3°C) and lows around 24°F (-5°C). Based on 2015–2024 weather data, temperatures have reached as high as 95°F (35°C) and dropped as low as -17°F (-27°C).
Rain, sun and snow
May is usually the wettest month. It brings about 4.6 inches (117 mm) of rain over 14 days, while September is the driest. July brings the most sunshine, averaging 11.8 hours of sun a day. Snow falls on about 12 days in a typical year, mostly from November through April.
Season by season
Spring (March through May)
Spring in Dayton is crisp but comfortable, with daytime highs averaging 62°F (17°C) and nights around 44°F (6°C); expect showers on roughly 38 days across the season, plus around 2 snowy days.
Summer (June through August)
Summer in Dayton is hot, with daytime highs averaging 82°F (28°C) and nights around 65°F (18°C); expect showers on roughly 37 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Fall (September through November)
Fall in Dayton is mild, with daytime highs averaging 66°F (19°C) and nights around 49°F (9°C); expect showers on roughly 25 days across the season.
Winter (December through February)
Winter in Dayton is chilly, with daytime highs averaging 42°F (5°C) and nights around 26°F (-3°C); expect showers on roughly 31 days across the season, plus around 8 snowy days.
Average temperatures in Dayton by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 38° | 24° | 10 | 3.5 in | 5.2 h/day | 72% |
| February | 43° | 26° | 10 | 3.6 in | 6.5 h/day | 70% |
| March | 52° | 34° | 12 | 4.6 in | 7.4 h/day | 67% |
| April | 62° | 43° | 12 | 4.2 in | 8.8 h/day | 67% |
| May | 73° | 54° | 14 | 4.6 in | 10.1 h/day | 71% |
| June | 81° | 63° | 12 | 4.4 in | 11.6 h/day | 69% |
| July | 84° | 67° | 13 | 4.2 in | 11.8 h/day | 73% |
| August | 82° | 65° | 11 | 3.5 in | 11.2 h/day | 73% |
| September | 78° | 60° | 8 | 2.9 in | 9.9 h/day | 70% |
| October | 66° | 49° | 9 | 2.9 in | 8.2 h/day | 70% |
| November | 52° | 37° | 8 | 2.9 in | 6.4 h/day | 71% |
| December | 44° | 30° | 11 | 3.3 in | 4.9 h/day | 75% |