Dayton, OH Weather
Dayton hourly forecast: next 24 hours
Today's high of 82°F (28°C) is right in line with the typical August high of 82°F (28°C).
Current conditions in detail
Dayton weather tomorrow (Thursday, August 27)
Tomorrow in Dayton looks sunny, with a high of 78° and an overnight low of 65°. There is a 57% 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
Seasons are the whole story in Dayton. The gap between an average July and an average January is 25°C - hot, humid summers and generally mild winters - which in practice means 84°F (29°C) afternoons at one end of the calendar and 38°F (3°C) at the other.
Dayton weather: quick facts
- Hottest month: July - highs near 84°F (29°C)
- Coldest month: January - highs near 38°F (3°C)
- Decade extremes (2015-2024): 95°F (35°C) high · -17°F (-27°C) low
- Wettest month: May (14 rainy days) · Sunniest: July (11.8 h sun/day)
- Climate type: humid subtropical
- Annual swing: 25°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 12 days a year
- Months with freezing average lows: 3
- Average humidity: 71%
Temperatures through the year
Sunshine averages 8.5 hours a day over the year, peaking in July at 11.8 hours. January sits at the other end of the year: 38°F (3°C) by day, 24°F (-5°C) at night. July is the warm end of the year, averaging 84°F (29°C) by day and 67°F (20°C) overnight. The gridded 2015-2024 daily record for this location tops out at 95°F (35°C) and bottoms at -17°F (-27°C) - decade extremes, not all-time station records. May is the wettest month at 4.6 inches (117 mm) over 14 days; September is the driest.
Rain, sun and snow
Overnight lows average at or below freezing for 3 months, December through February.
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); rain falls on around 38 of the 90 days, plus about 2 snowy days.
Summer (June through August)
Summer brings hot afternoons here - highs near 82°F (28°C), nights near 65°F (18°C), and rain falls on around 37 of the 90 days. Daylight is generous - around 11.5 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Fall (September through November)
Fall is crisp but comfortable here - highs near 66°F (19°C), nights near 49°F (9°C), and 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); rain falls on around 31 of the 90 days, plus about 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% |