Ballymena weather in September 2025

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

  • 15°C maximum daytime temperature in September in Ballymena15
    15°C max day temperature
  • 3 hours of sunshine per day
  • 19 days with some rainfall in September in Ballymena19
    19 days with some rainfall
  • 8°C minimum night-time temperature in September in Ballymena8
    8°C min night temperature
  • 13 hours of daylight per day in September in Ballymena13
    13 hours of daylight per day
  • No heat & humidity in September in Ballymena0
    No heat & humidity
  • 105 mm monthly rainfall in September in Ballymena105
    105 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Ballymena3
    3 (Moderate) UV index

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

Daytime temperatures usually reach 15°C in Ballymena in September, falling to 8°C at night.

How sunny is it in Ballymena in September?

There are normally 3 hours of bright sunshine each day in Ballymena in September - that's 27% of daylight hours.

Does it rain in Ballymena in September?

There are usually 19 days with some rain in Ballymena in September and the average monthly rainfall is 105mm.

Ballymena September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:32 19:17
Monday, 15th September 2025 05:58 18:41
Tuesday, 30th September 2025 06:26 18:03

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