May · United Kingdom
Best time to visit Belfast in May Weather, crowds & prices
Weather in Belfast in May
Average temperature 12°C, 84 mm of rain, about 23 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
7.7/10
Ranked #4 of 12 months
- Avg temp
- 12°C
- Rainfall
- 84 mm
- Humidity
- 81%
- Days with 6h+ sun
- 23
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Belfast scores 7.7/10 for sightseeing and cultural travel - an above-average month (#4 of 12). Expect around 12°C, 84 mm of rain, and roughly 23 days with 6+ hours of sunshine this month.
Belfast's Titanic Quarter, Cathedral Quarter, and political murals trace a shipbuilding city remaking its waterfront.
May in Belfast: strong conditions, 4th of 12
Temperatures hover around 12°C (54°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 84 mm of rain this month — a flexible day or two helps — with about 23 days with 6+ hours of sunshine and 16.1 hours of daylight to work around it.
That is 7.7/10 on the same scale — 4th of 12 months, versus 8.1/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Budget for mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Belfast in May?
- In May, Belfast averages 12°C, 84 mm of rain, and about 23 days with 6+ hours of sunshine. Its climate-comfort score is 7.7/10.
- Is May a good time to visit Belfast?
- May earns a 7.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Belfast in May?
- Expect about 84 mm of rain in May. Average humidity is 81% and there are about 23 days with 6+ hours of sunshine.
Curated in Belfast
Tickets & experiences
Things to do in Belfast
Belfast, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.