Ballymena weather in May 2026

Q: How warm is it in Ballymena in May?

Daytime temperatures usually reach 14°C in Ballymena in May, falling to 6°C at night.

Q: How sunny is it in Ballymena in May?

There are normally 6 hours of bright sunshine each day in Ballymena in May - that's 37% of daylight hours.

Q: Is the sea cold around Ballymena in May?

The average sea temperature around Ballymena in May is 9°C.

Q: Does it rain in Ballymena in May?

There are usually 16 days with some rain in Ballymena in May and the average monthly rainfall is 65mm.

Expect daytime maximum temperatures of 13°C in Ballymena, Northern Ireland in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 17 days with some rainfall and typically 68 mm of rainfall in the month.

13
13°C max day temperature
6
6 hours of sunshine per day
17
17 days with some rainfall
5
5°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
68
68 mm of monthly rainfall
5
5 (Moderate) UV index

More about Ballymena

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The May 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)