La Crosse weather in September 2025

Expect 22°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in La Crosse in September. Check more long-term weather averages for La Crosse in September before you book your next holiday to Wisconsin in 2025/2026.

  • 22°C maximum daytime temperature in September in La Crosse22
    22°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in La Crosse10
    10 days with some rainfall
  • 10°C minimum night-time temperature in September in La Crosse10
    10°C min night temperature
  • 12 hours of daylight per day in September in La Crosse12
    12 hours of daylight per day
  • No heat & humidity in September in La Crosse0
    No heat & humidity
  • 95 mm monthly rainfall in September in La Crosse95
    95 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in La Crosse6
    6 (High) UV index

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The September weather guide for Wisconsin (La Crosse) 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 La Crosse in September?

Daytime temperatures usually reach 22°C in La Crosse in September, falling to 10°C at night.

How sunny is it in La Crosse in September?

There are normally 7 hours of bright sunshine each day in La Crosse in September - that's 57% of daylight hours.

Does it rain in La Crosse in September?

There are usually 10 days with some rain in La Crosse in September and the average monthly rainfall is 95mm.

La Crosse September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:29 18:40
Monday, 15th September 2025 05:45 18:15
Tuesday, 30th September 2025 06:02 17:47

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