Cincinnati weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Cincinnati in September. Check more long-term weather averages for Cincinnati in September before you book your next holiday to Ohio in 2025/2026.

  • 26°C maximum daytime temperature in September in Cincinnati26
    26°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Cincinnati8
    8 days with some rainfall
  • 14°C minimum night-time temperature in September in Cincinnati14
    14°C min night temperature
  • 12 hours of daylight per day in September in Cincinnati12
    12 hours of daylight per day
  • Low heat & humidity in September in CincinnatiL
    Low heat & humidity
  • 76 mm monthly rainfall in September in Cincinnati76
    76 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Cincinnati7
    7 (High) UV index

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The September weather guide for Ohio (Cincinnati) 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Cincinnati in September?

Daytime temperatures usually reach 26°C in Cincinnati in September with low heat and humidity, falling to 14°C at night.

How sunny is it in Cincinnati in September?

There are normally 8 hours of bright sunshine each day in Cincinnati in September - that's 62% of daylight hours.

Does it rain in Cincinnati in September?

There are usually 8 days with some rain in Cincinnati in September and the average monthly rainfall is 76mm.

Cincinnati September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:07 19:08
Monday, 15th September 2025 06:20 18:46
Tuesday, 30th September 2025 06:33 18:22

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