Isle of Islay weather in September 2025

Expect 15°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Isle of Islay in September. Check more long-term weather averages for Isle of Islay in September before you book your next holiday to Scotland in 2025/2026.

  • 15°C maximum daytime temperature in September in Isle of Islay15
    15°C max day temperature
  • 3 hours of sunshine per day
  • 19 days with some rainfall in September in Isle of Islay19
    19 days with some rainfall
  • 9°C minimum night-time temperature in September in Isle of Islay9
    9°C min night temperature
  • 13 hours of daylight per day in September in Isle of Islay13
    13 hours of daylight per day
  • No heat & humidity in September in Isle of Islay0
    No heat & humidity
  • 140 mm monthly rainfall in September in Isle of Islay140
    140 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Isle of Islay3
    3 (Moderate) UV index
  • 14°C sea temperature in September in Isle of Islay14
    14°C sea temperature

More about Isle of Islay

Isle of Islay by month

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The September weather guide for Scotland (Isle of Islay) 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 Scotland

How warm is it in Isle of Islay in September?

Daytime temperatures usually reach 15°C in Isle of Islay in September, falling to 9°C at night.

How sunny is it in Isle of Islay in September?

There are normally 3 hours of bright sunshine each day in Isle of Islay in September - that's 26% of daylight hours.

How warm is the sea around Isle of Islay in September?

The average sea temperature around Isle of Islay in September is 14°C.

Does it rain in Isle of Islay in September?

There are usually 19 days with some rain in Isle of Islay in September and the average monthly rainfall is 140mm.

Isle of Islay September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:30 19:18
Monday, 15th September 2025 05:57 18:42
Tuesday, 30th September 2025 06:26 18:02

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