Formentera weather in September 2025

Expect 28°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Formentera in September. Check more long-term weather averages for Formentera in September before you book your next holiday to Formentera in 2025/2026.

  • 28°C maximum daytime temperature in September in Formentera28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 6 days with some rainfall in September in Formentera6
    6 days with some rainfall
  • 19°C minimum night-time temperature in September in Formentera19
    19°C min night temperature
  • 12 hours of daylight per day in September in Formentera12
    12 hours of daylight per day
  • Moderate heat & humidity in September in FormenteraM
    Moderate heat & humidity
  • 41 mm monthly rainfall in September in Formentera41
    41 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Formentera6
    6 (High) UV index
  • 25°C sea temperature in September in Formentera25
    25°C sea temperature

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The September weather guide for Formentera 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 Formentera in September?

Daytime temperatures usually reach 28°C in Formentera in September with moderate heat and humidity, falling to 19°C at night.

How sunny is it in Formentera in September?

There are normally 8 hours of bright sunshine each day in Formentera in September - that's 65% of daylight hours.

How warm is the sea around Formentera in September?

The average sea temperature around Formentera in September is 25°C.

Does it rain in Formentera in September?

There are usually 6 days with some rain in Formentera in September and the average monthly rainfall is 41mm.

Formentera September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:23 19:24
Monday, 15th September 2025 06:36 19:02
Tuesday, 30th September 2025 06:49 18:38

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