Ballymena weather in September 2025

Q: How warm is it in Ballymena in September?

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

Q: 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.

Q: 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.

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
15°C max day temperature
3
3 hours of sunshine per day
19
19 days with some rainfall
8
8°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
105
105 mm of monthly rainfall
3
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)

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.

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