St Augustine weather in September 2025

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

  • 31°C maximum daytime temperature in September in St Augustine31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in September in St Augustine13
    13 days with some rainfall
  • 22°C minimum night-time temperature in September in St Augustine22
    22°C min night temperature
  • 12 hours of daylight per day in September in St Augustine12
    12 hours of daylight per day
  • High heat & humidity in September in St AugustineH
    High heat & humidity
  • 173 mm monthly rainfall in September in St Augustine173
    173 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in St Augustine9
    9 (Very High) UV index
  • 28°C sea temperature in September in St Augustine28
    28°C sea temperature

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The September weather guide for Florida (St Augustine) 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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More about Florida

How hot is it in St Augustine in September?

Daytime temperatures usually reach 31°C in St Augustine in September with high heat and humidity, falling to 22°C at night.

How sunny is it in St Augustine in September?

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

How warm is the sea around St Augustine in September?

The average sea temperature around St Augustine in September is 28°C.

Does it rain in St Augustine in September?

There are usually 13 days with some rain in St Augustine in September and the average monthly rainfall is 173mm.

What is the chance of a hurricane in St Augustine in September?

On average 1.3 days in September in St Augustine are likely to be affected by the passage of one or more tropical storms.

St Augustine September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:03 18:47
Monday, 15th September 2025 06:10 18:30
Tuesday, 30th September 2025 06:18 18:11

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