Downpatrick weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Downpatrick in September. Check more long-term weather averages for Downpatrick in September before you book your next holiday to Northern Ireland in 2025/2026.

  • 16°C maximum daytime temperature in September in Downpatrick16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in September in Downpatrick16
    16 days with some rainfall
  • 9°C minimum night-time temperature in September in Downpatrick9
    9°C min night temperature
  • 13 hours of daylight per day in September in Downpatrick13
    13 hours of daylight per day
  • No heat & humidity in September in Downpatrick0
    No heat & humidity
  • 85 mm monthly rainfall in September in Downpatrick85
    85 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Downpatrick3
    3 (Moderate) UV index
  • 14°C sea temperature in September in Downpatrick14
    14°C sea temperature

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Recommended for Northern Ireland

  • Kids stay & eat for free at Marriot Bonvoy
  • Destinations include Europe, Middle East & Africa
  • Valid for up to 2 adults & 2 kids aged up to 12

The September weather guide for Northern Ireland (Downpatrick) 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 Downpatrick in September?

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

How sunny is it in Downpatrick in September?

There are normally 4 hours of bright sunshine each day in Downpatrick in September - that's 32% of daylight hours.

How warm is the sea around Downpatrick in September?

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

Does it rain in Downpatrick in September?

There are usually 16 days with some rain in Downpatrick in September and the average monthly rainfall is 85mm.

Downpatrick September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:31 19:14
Monday, 15th September 2025 05:56 18:39
Tuesday, 30th September 2025 06:23 18:01

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