Olbia weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Olbia in September. Check more long-term weather averages for Olbia in September before you book your next holiday to Sardinia in 2025/2026.

  • 26°C maximum daytime temperature in September in Olbia26
    26°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Olbia8
    8 days with some rainfall
  • 17°C minimum night-time temperature in September in Olbia17
    17°C min night temperature
  • 12 hours of daylight per day in September in Olbia12
    12 hours of daylight per day
  • Low heat & humidity in September in OlbiaL
    Low heat & humidity
  • 30 mm monthly rainfall in September in Olbia30
    30 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Olbia6
    6 (High) UV index
  • 23°C sea temperature in September in Olbia23
    23°C sea temperature

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The September weather guide for Sardinia (Olbia) 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 Sardinia

How hot is it in Olbia in September?

Daytime temperatures usually reach 26°C in Olbia in September with low heat and humidity, falling to 17°C at night.

How sunny is it in Olbia in September?

There are normally 8 hours of bright sunshine each day in Olbia in September - that's 66% of daylight hours.

How warm is the sea around Olbia in September?

The average sea temperature around Olbia in September is 23°C.

Does it rain in Olbia in September?

There are usually 8 days with some rain in Olbia in September and the average monthly rainfall is 30mm.

Olbia September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:49 18:54
Monday, 15th September 2025 06:03 18:31
Tuesday, 30th September 2025 06:18 18:05

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