Grand Island weather in September 2025

Expect 25°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Grand Island in September. Check more long-term weather averages for Grand Island in September before you book your next holiday to Nebraska in 2025/2026.

  • 25°C maximum daytime temperature in September in Grand Island25
    25°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in September in Grand Island8
    8 days with some rainfall
  • 11°C minimum night-time temperature in September in Grand Island11
    11°C min night temperature
  • 12 hours of daylight per day in September in Grand Island12
    12 hours of daylight per day
  • No heat & humidity in September in Grand Island0
    No heat & humidity
  • 70 mm monthly rainfall in September in Grand Island70
    70 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Grand Island6
    6 (High) UV index

More about Grand Island

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The September weather guide for Nebraska (Grand Island) 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 Grand Island in September?

Daytime temperatures usually reach 25°C in Grand Island in September with no heat and humidity, falling to 11°C at night.

How sunny is it in Grand Island in September?

There are normally 9 hours of bright sunshine each day in Grand Island in September - that's 71% of daylight hours.

Does it rain in Grand Island in September?

There are usually 8 days with some rain in Grand Island in September and the average monthly rainfall is 70mm.

Grand Island September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:01 19:05
Monday, 15th September 2025 06:14 18:42
Tuesday, 30th September 2025 06:29 18:16

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