Belfast weather in June 2025

Q: How warm is it in Belfast in June?

Daytime temperatures usually reach 17°C in Belfast in June, falling to 9°C at night.

Q: How sunny is it in Belfast in June?

There are normally 6 hours of bright sunshine each day in Belfast in June - that's 34% of daylight hours.

Q: Is the sea cold around Belfast in June?

The average sea temperature around Belfast in June is 11°C.

Q: Does it rain in Belfast in June?

There are usually 15 days with some rain in Belfast in June and the average monthly rainfall is 68mm.

Expect daytime maximum temperatures of 17°C in Belfast, Northern Ireland in June based on long-term weather averages. There are 6 hours of sunshine per day on average with 15 days with some rainfall and typically 68 mm of rainfall in the month.

17
17°C max day temperature
6
6 hours of sunshine per day
15
15 days with some rainfall
9
9°C min night temperature
17
17 hours of daylight per day
0
No heat & humidity
68
68 mm of monthly rainfall
6
6 (High) UV index
11
11°C sea temperature

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The June weather guide for Northern Ireland (Belfast) 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)