Westport weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Westport in September. Check more long-term weather averages for Westport in September before you book your next holiday to Ireland in 2025/2026.

  • 16°C maximum daytime temperature in September in Westport16
    16°C max day temperature
  • 3 hours of sunshine per day
  • 21 days with some rainfall in September in Westport21
    21 days with some rainfall
  • 9°C minimum night-time temperature in September in Westport9
    9°C min night temperature
  • 13 hours of daylight per day in September in Westport13
    13 hours of daylight per day
  • No heat & humidity in September in Westport0
    No heat & humidity
  • 119 mm monthly rainfall in September in Westport119
    119 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Westport4
    4 (Moderate) UV index
  • 14°C sea temperature in September in Westport14
    14°C sea temperature

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The September weather guide for Ireland (Westport) 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 Ireland

How warm is it in Westport in September?

Daytime temperatures usually reach 16°C in Westport in September, falling to 9°C at night.

How sunny is it in Westport in September?

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

How warm is the sea around Westport in September?

The average sea temperature around Westport in September is 14°C.

Does it rain in Westport in September?

There are usually 21 days with some rain in Westport in September and the average monthly rainfall is 119mm.

Westport September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:47 19:28
Monday, 15th September 2025 06:12 18:54
Tuesday, 30th September 2025 06:38 18:16

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