Dungannon weather in May 2026

Q: How warm is it in Dungannon in May?

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

Q: How sunny is it in Dungannon in May?

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

Q: Is the sea cold around Dungannon in May?

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

Q: Does it rain in Dungannon in May?

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

Expect daytime maximum temperatures of 57°F in Dungannon, Northern Ireland in May based on long-term weather averages. There are 5 hours of sunshine per day on average with 17 days with some rainfall and typically 2.6 inches of rainfall in the month.

57
57°F max day temperature
5
5 hours of sunshine per day
17
17 days with some rainfall
43
43°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
2.6
2.6 inches of monthly rainfall
5
5 (Moderate) UV index

More about Dungannon

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The May weather guide for Northern Ireland (Dungannon) 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)