Louisville weather in September 2025

Expect 81°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Louisville in September. Check more long-term weather averages for Louisville in September before you book your next holiday to Kentucky in 2025/2026.

  • 81°F maximum daytime temperature in September in Louisville81
    81°F max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Louisville8
    8 days with some rainfall
  • 57°F minimum night-time temperature in September in Louisville57
    57°F min night temperature
  • 12 hours of daylight per day in September in Louisville12
    12 hours of daylight per day
  • Low heat & humidity in September in LouisvilleL
    Low heat & humidity
  • 3.1 inches monthly rainfall in September in Louisville3.1
    3.1 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Louisville7
    7 (High) UV index

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The September weather guide for Kentucky (Louisville) 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 Louisville in September?

Daytime temperatures usually reach 81°F in Louisville in September with low heat and humidity, falling to 57°F at night.

How sunny is it in Louisville in September?

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

Does it rain in Louisville in September?

There are usually 8 days with some rain in Louisville in September and the average monthly rainfall is 3.1 inches.

Louisville September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:13 19:12
Monday, 15th September 2025 06:25 18:51
Tuesday, 30th September 2025 06:38 18:27

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