With daytime temperatures of 28°C (82°F) and nighttime lows of 25°C (77°F), May in Belfast brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 143 mm (5.6 in) falls on average.
Should you favor a climate that's both dry and comfortably warm, January, February, March, April and December typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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Pick a month to see the average temperature, rainfall and sunshine in Belfast - and find the best time to visit.
49-year average (1976-2025)
Based on our historical records, temperatures in Belfast typically stay consistent throughout May, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 26°C (79°F).
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Belfast spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 29 years of weather observations in Belfast between 1997 and 2026, these are the recorded extremes.
Find out more about the weather in Jamaica and which places have the best travel conditions in this month. See all of Jamaica in May →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Belfast climate overview or explore weather in Jamaica.
Where to go in May - average daytime high across popular destinations.
Montego Bay
31°C (88°F) Falmouth30°C (86°F) Runaway Bay30°C (86°F) Treasure Beach
30°C (86°F) Ocho Rios
30°C (86°F) Kingston29°C (84°F) Negril30°C (86°F) Port Antonio28°C (82°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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