Ballymena weather in September 2026

Q: How warm is it in Ballymena in September?

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

Q: How sunny is it in Ballymena in September?

There are normally 4 hours of bright sunshine each day in Ballymena in September - that's 30% of daylight hours.

Q: How warm is the sea around Ballymena in September?

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

Q: Does it rain in Ballymena in September?

There are usually 17 days with some rain in Ballymena in September and the average monthly rainfall is 94mm.

Expect daytime maximum temperatures of 59°F in Ballymena, Northern Ireland in September based on long-term weather averages. There are 3 hours of sunshine per day on average with 19 days with some rainfall and typically 4.1 inches of rainfall in the month.

59
59°F max day temperature
3
3 hours of sunshine per day
19
19 days with some rainfall
46
46°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
4.1
4.1 inches of monthly rainfall
3
3 (Moderate) UV index

More about Ballymena

Ballymena by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Northern Ireland

Zest Car Rental: Latest UK car hire deals

Sale

Search for car hire deals at airports across the UK
Compare prices on Budget, Europcar, Hertz, Dollar & Firefly
Book car hire at Birmingham, Gatwick, Manchester & more

Go to Zest Car Rental deal >>

View all Zest Car Rental offers

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) | Imperial (°F)

More about the UK

How warm is it in Ballymena in September?

Daytime temperatures usually reach 61°F in Ballymena in September, falling to 48°F at night.

How sunny is it in Ballymena in September?

There are normally 4 hours of bright sunshine each day in Ballymena in September - that's 30% of daylight hours.

How warm is the sea around Ballymena in September?

The average sea temperature around Ballymena in September is 57°F.

Does it rain in Ballymena in September?

There are usually 17 days with some rain in Ballymena in September and the average monthly rainfall is 3.7 inches.

Ballymena September sunrise & sunset times

Browse the sunrise and sunset times for Ballymena in September 2026. Select a month to view Ballymena sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec