Larne weather in July 2025

Q: How warm is it in Larne in July?

Daytime temperatures usually reach 17°C in Larne in July, falling to 10°C at night.

Q: How sunny is it in Larne in July?

There are normally 5 hours of bright sunshine each day in Larne in July - that's 29% of daylight hours.

Q: How warm is the sea around Larne in July?

The average sea temperature around Larne in July is 12°C.

Q: Does it rain in Larne in July?

There are usually 15 days with some rain in Larne in July and the average monthly rainfall is 74mm.

Expect 17°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Larne in July. Check more long-term weather averages for Larne in July before you book your next holiday to Northern Ireland in 2025/2026.

17
17°C max day temperature
5
5 hours of sunshine per day
15
15 days with some rainfall
10
10°C min night temperature
17
17 hours of daylight per day
0
No heat & humidity
74
74 mm of monthly rainfall
6
6 (High) UV index
12
12°C sea temperature

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The July weather guide for Northern Ireland (Larne) 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)