Marietta weather in September 2026

Expect daytime maximum temperatures of 77°F in Marietta, Ohio in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 3.1 inches of rainfall in the month.

  • 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 no heat and humidity, falling to 54°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 57% of daylight hours.

Does it rain in Marietta in September?

There are usually 8 days with some rain in Marietta in September and the average monthly rainfall is 2.8 inches.

Marietta September sunrise & sunset times

Browse the sunrise and sunset times for Marietta in September 2026. Select a month to view Marietta sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:54 18:57
Tuesday, 15th September 2026 06:07 18:34
Wednesday, 30th September 2026 06:21 18:10

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