Stornoway, Lewis weather in September 2025

Expect daytime maximum temperatures of 14°C in Stornoway, Lewis in September based on long-term weather averages. There are 3 hours of sunshine per day on average with 22 days with some rainfall and typically 134 mm of rainfall in the month.

  • 14°C maximum daytime temperature in September in Stornoway, Lewis14
    14°C max day temperature
  • 3 hours of sunshine per day
  • 22 days with some rainfall in September in Stornoway, Lewis22
    22 days with some rainfall
  • 8°C minimum night-time temperature in September in Stornoway, Lewis8
    8°C min night temperature
  • 13 hours of daylight per day in September in Stornoway, Lewis13
    13 hours of daylight per day
  • No heat & humidity in September in Stornoway, Lewis0
    No heat & humidity
  • 134 mm monthly rainfall in September in Stornoway, Lewis134
    134 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Stornoway, Lewis3
    3 (Moderate) UV index
  • 13°C sea temperature in September in Stornoway, Lewis13
    13°C sea temperature

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Stornoway, Lewis by month

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The September weather guide for Scotland (Stornoway, Lewis) 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 Stornoway, Lewis in September?

Daytime temperatures usually reach 14°C in Stornoway, Lewis in September, falling to 8°C at night.

How sunny is it in Stornoway, Lewis in September?

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

How warm is the sea around Stornoway, Lewis in September?

The average sea temperature around Stornoway, Lewis in September is 13°C.

Does it rain in Stornoway, Lewis in September?

There are usually 22 days with some rain in Stornoway, Lewis in September and the average monthly rainfall is 134mm.

Stornoway, Lewis September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:25 19:24
Monday, 15th September 2025 05:56 18:44
Tuesday, 30th September 2025 06:28 18:02

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