Portstewart weather in September 2024

Expect 15°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Portstewart in September. Check more long-term weather averages for Portstewart in September before you book your next holiday to Northern Ireland in 2024/2025.

  • 15°C maximum daytime temperature in September in Portstewart15
    15°C max day temperature
  • 3 hours of sunshine per day
  • 20 days with some rainfall in September in Portstewart20
    20 days with some rainfall
  • 9°C minimum night-time temperature in September in Portstewart9
    9°C min night temperature
  • 13 hours of daylight per day in September in Portstewart13
    13 hours of daylight per day
  • No heat & humidity in September in Portstewart0
    No heat & humidity
  • 107 mm monthly rainfall in September in Portstewart107
    107 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Portstewart3
    3 (Moderate) UV index
  • 14°C sea temperature in September in Portstewart14
    14°C sea temperature

More about Portstewart

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The September weather guide for Northern Ireland (Portstewart) 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 the UK

How warm is it in Portstewart in September?

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

How sunny is it in Portstewart in September?

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

How warm is the sea around Portstewart in September?

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

Does it rain in Portstewart in September?

There are usually 20 days with some rain in Portstewart in September and the average monthly rainfall is 107mm.

Portstewart September sunrise & sunset times

Browse the sunrise and sunset times for Portstewart in September 2024. Select a month to view Portstewart sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2024 06:34 20:19
Sunday, 15th September 2024 07:00 19:43
Monday, 30th September 2024 07:28 19:04

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