Dayton weather in September 2025

Expect 77°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Dayton in September. Check more long-term weather averages for Dayton in September before you book your next holiday to Ohio in 2025/2026.

  • 77°F maximum daytime temperature in September in Dayton77
    77°F max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Dayton8
    8 days with some rainfall
  • 55°F minimum night-time temperature in September in Dayton55
    55°F min night temperature
  • 12 hours of daylight per day in September in Dayton12
    12 hours of daylight per day
  • Low heat & humidity in September in DaytonL
    Low heat & humidity
  • 2.6 inches monthly rainfall in September in Dayton2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Dayton7
    7 (High) UV index

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Recommended for Ohio

  • Kids stay & eat for free at Marriot Bonvoy
  • Destinations include Europe, Middle East & Africa
  • Valid for up to 2 adults & 2 kids aged up to 12

The September weather guide for Ohio (Dayton) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Dayton in September?

Daytime temperatures usually reach 77°F in Dayton in September with low heat and humidity, falling to 55°F at night.

How sunny is it in Dayton in September?

There are normally 8 hours of bright sunshine each day in Dayton in September - that's 63% of daylight hours.

Does it rain in Dayton in September?

There are usually 8 days with some rain in Dayton in September and the average monthly rainfall is 2.6 inches.

Dayton September sunrise & sunset times

Browse the sunrise and sunset times for Dayton in September 2025. Select a month to view Dayton sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:05 19:07
Monday, 15th September 2025 06:18 18:45
Tuesday, 30th September 2025 06:32 18:20

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