Marietta weather in September 2025

Expect 77°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Marietta in September. Check more long-term weather averages for Marietta in September before you book your next holiday to Ohio in 2025/2026.

  • 77°F maximum daytime temperature in September in Marietta77
    77°F max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Marietta10
    10 days with some rainfall
  • 55°F minimum night-time temperature in September in Marietta55
    55°F min night temperature
  • 12 hours of daylight per day in September in Marietta12
    12 hours of daylight per day
  • Low heat & humidity in September in MariettaL
    Low heat & humidity
  • 3.1 inches monthly rainfall in September in Marietta3.1
    3.1 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Marietta7
    7 (High) UV index

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The September weather guide for Ohio (Marietta) 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 Marietta in September?

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

How sunny is it in Marietta in September?

There are normally 7 hours of bright sunshine each day in Marietta in September - that's 56% of daylight hours.

Does it rain in Marietta in September?

There are usually 10 days with some rain in Marietta in September and the average monthly rainfall is 3.1 inches.

What is the chance of a hurricane in Marietta in September?

On average less than 1 day in September in Marietta is likely to be affected by the passage of one or more tropical storms.

Marietta September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:55 18:56
Monday, 15th September 2025 06:07 18:34
Tuesday, 30th September 2025 06:21 18:09

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