Northern Ireland weather in May 2021

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Below are average maximum temperatures at popular destinations in Northern Ireland in May. Select a destination to see more weather parameters.

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The May weather guide for Northern Ireland 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.

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How warm is it in Northern Ireland in May?

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

How sunny is it in Northern Ireland in May?

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

Is the sea cold around Northern Ireland in May?

The average sea temperature around Belfast, Northern Ireland in May is 9°C.

Does it rain in Northern Ireland in May?

There are usually 16 days with some rain in Belfast, Northern Ireland in May and the average monthly rainfall is 65mm.

Metric (°C / mm)  |  Imperial (°F / inches)

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Northern Ireland sunrise & sunset times for May 2021

Browse the sunrise and sunset times for Northern Ireland in May 2021. Select a month to view Northern Ireland sunrise & sunset times for the next 12 months. The Northern Ireland sunrise and sunset times shown below are for Belfast.


Date Sunrise times Sunset times
Saturday, 1st May 2021 05:45 20:58
Sunday, 16th May 2021 05:16 21:25
Monday, 31st May 2021 04:56 21:48
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