Jacksonville weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Jacksonville in September. Check more long-term weather averages for Jacksonville in September before you book your next holiday to Florida in 2025/2026.

  • 31°C maximum daytime temperature in September in Jacksonville31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 12 days with some rainfall in September in Jacksonville12
    12 days with some rainfall
  • 21°C minimum night-time temperature in September in Jacksonville21
    21°C min night temperature
  • 12 hours of daylight per day in September in Jacksonville12
    12 hours of daylight per day
  • High heat & humidity in September in JacksonvilleH
    High heat & humidity
  • 165 mm monthly rainfall in September in Jacksonville165
    165 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Jacksonville9
    9 (Very High) UV index

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The September weather guide for Florida (Jacksonville) 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 Jacksonville in September?

Daytime temperatures usually reach 31°C in Jacksonville in September with high heat and humidity, falling to 21°C at night.

How sunny is it in Jacksonville in September?

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

Does it rain in Jacksonville in September?

There are usually 12 days with some rain in Jacksonville in September and the average monthly rainfall is 165mm.

What is the chance of a hurricane in Jacksonville in September?

On average 1.2 days in September in Jacksonville are likely to be affected by the passage of one or more tropical storms.

Jacksonville September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:04 18:49
Monday, 15th September 2025 06:11 18:32
Tuesday, 30th September 2025 06:20 18:13

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