Chesterton weather in September 2025

Expect daytime maximum temperatures of 24°C in Chesterton, Indiana in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 96 mm of rainfall in the month.

  • 24°C maximum daytime temperature in September in Chesterton24
    24°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Chesterton9
    9 days with some rainfall
  • 12°C minimum night-time temperature in September in Chesterton12
    12°C min night temperature
  • 12 hours of daylight per day in September in Chesterton12
    12 hours of daylight per day
  • No heat & humidity in September in Chesterton0
    No heat & humidity
  • 96 mm monthly rainfall in September in Chesterton96
    96 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Chesterton6
    6 (High) UV index
  • 19°C sea temperature in September in Chesterton19
    19°C sea temperature

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The September weather guide for Indiana (Chesterton) 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 Chesterton in September?

Daytime temperatures usually reach 24°C in Chesterton in September, falling to 12°C at night.

How sunny is it in Chesterton in September?

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

How warm is the sea around Chesterton in September?

The average sea temperature around Chesterton in September is 19°C.

Does it rain in Chesterton in September?

There are usually 9 days with some rain in Chesterton in September and the average monthly rainfall is 96mm.

Chesterton September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:15 18:21
Monday, 15th September 2025 05:29 17:57
Tuesday, 30th September 2025 05:44 17:31

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