Clima en Belfast en mayo
Belfast en mayo: fresco, algo lluvioso, con aire limpio — un momento excelente para ir.
Actualizado: septiembre de 2026 · normales climáticas del reanálisis ERA5
n.º 4 de 12 meses en Belfast · n.º 490 de 1413 destinos para visitar en mayo · confort 84/100 (nivel A)
- Días
- 17°C
- Noches
- 9°C
- Días de lluvia
- 11
- Sol
- 10.6 h
- Humedad
- 78%
- Horas de luz
- 16 h

Notas de viajeros sobre Belfast en mayo
Regulars rate May over Easter here on two counts - better odds on the weather, and a month outside the marching season, so nothing to plan around. They are honest that the odds are only odds: one contributor remembers a grey, cool, wet May, and they describe the local climate as erratic with summers that are mild rather than warm. Our row is the temperate middle of that, 17.2C reading as 15C in an 18.5 kph wind, 8.5C nights, and 51.1mm of rain across 10.7 days. What May reliably gives is 16.1 hours of daylight, which is what makes the coast road north worth a whole day. The record: humidity 78 percent, 10.6 hours of sun and AQI 40.
Otros meses en Belfast
Regulars are specific that National Trust properties around the region start reducing their opening hours this month as the summer season winds down, a real planning detail beyond the weather itself for anyone timing day trips out of the city. Our row backs that mild, genuinely wet read, 17.5C over 10.7C nights feeling 9C, with 80.3mm of rain across 12.7 days and humidity at 82 percent. Regulars are consistent the city itself thins out noticeably once summer tourists head home, easier hotel availability a real upside to the increased rain risk. Layers and a proper rain jacket remain the standard advice regardless of which week a visit lands on. The record: 7.3 hours of sun, a 21.5 kph wind and AQI 35.
August is among the warmest months here and regulars put it at 16 to 18C, a little under our row's 19.7C, with the streets noticeably busier than in the cold half of the year. On rain they are matter-of-fact rather than apologetic: this is a temperate climate, it rains through the year, and the one item never to leave at home is a rain and wind jacket. Our row is blunter than their word for the north and east coast, relatively dry - 87.2mm across 14.4 days, so rain falls on close to half the days of the month, though 8.9 hours of sun fall inside 14.9 of daylight. The record: 12.5C nights, humidity 82 percent, a 19.6 kph wind and AQI 30.
Belfast regulars answer the June question with a range and a shrug: usually 15 to 22C, and it could be sunny, cloudy or wet, because the weather here is erratic and summers are mild rather than warm. Our row's 19.3C over 11.3C sits in the middle of their range and reads as 18C once the 18.7 kph wind is counted. What they promise instead of warmth is light - at this latitude in June it is not properly dark until around eleven at night, which our row's 17.2 hours of daylight bears out, and it makes long evenings the best part of the day. The packing list never changes: layers, and a mac or a pacamac whatever the month. The record: 74.3mm across 11.8 precipitation days, humidity 79 percent, 10.2 hours of sun and AQI 38.
Belfast forum threads describe February as wet and chilly, part of the wider Northern Ireland winter that runs November through February, with typical temperatures cited around 4-8C and posters consistently noting real ice or snow is rare here even in the coldest stretch. The month was called genuinely unpredictable - rain, sleet, snow, gales, frost and sunshine can all show up within the same week, and late February could just as easily bring damp, cold and windy conditions or a mild, sunny day. Posters flagged limited daylight as more of a practical concern than the cold itself, recommending visitors pack for wet weather and plan sightseeing around the shorter days.
Añade tu propia nota desde la ficha de Belfast en el mapa.
Normales climáticas de Belfast — mayo
Medias mensuales del reanálisis ERA5. El AQI es el índice de calidad del aire de EE. UU. (US AQI) medio del mes.
Afluencia en Belfast en mayo
Cuánta gente hay en el propio lugar: vacaciones escolares y masivas, los meses que marcó el editor y cuánto atrae su clima. Nunca cuenta en la puntuación de confort.
Máxima afluenciaBelfast City Marathon, Late-May half-term en Reino Unido, vacaciones escolares en 3 de los mercados que lo llenan(estimado)
Máxima afluenciaConcurridoTemporada mediaTranquilo
Los mejores meses para el clima de Belfast
Ordenados según la propia puntuación de confort climático de este destino a lo largo del año, algo distinto de cuánta gente hay (consulta Afluencia, más arriba).
Clima aceptableEl clima de Belfast alcanza su mejor momento de junio a agosto, sobre todo hacia julio.
Mejor climaClima aceptableClima más duro
Qué hay en Belfast en mayo
Eventos de temporada recurrentes, espectáculos naturales, cierres y festivos, seleccionados y con fuente.
- Festival
Belfast City Marathon
28 Abr – 8 May · normalmenteEvento deportivoMucha genteUsually the first Sunday in May, running from Stormont into the centre and taking a long east-west line of the city out of use for most of the morning. Rooms go with the bank holiday weekend. Fuente ↗
Cerca, y con algo en marcha
A menos de 300 km de Belfast —una excursión de un día o un trayecto corto— y con algo en marcha este mes. Nunca cuenta en la puntuación de confort.
¿Dónde está Belfast?
Belfast en mayo — preguntas frecuentes
- ¿Es mayo un buen momento para visitar Belfast?
- Belfast en mayo: fresco, algo lluvioso, con aire limpio — un momento excelente para ir. Es el mes n.º 4 de 12 en Belfast según la puntuación de confort de SeasonMap (84/100).
- ¿Qué tiempo hace en Belfast en mayo?
- En mayo, Belfast tiene una máxima media diaria de 17.2°C y una mínima de 8.5°C, con unos 51.1 mm de lluvia repartidos en unos 10.7 días de lluvia.
- ¿Cómo es la calidad del aire en Belfast en mayo?
- En mayo, Belfast tiene un índice de calidad del aire (US AQI) medio de unos 40.
A menos de 300 km: Keswick Mountain Festival en Keswick, 15–17 May y Blossom in the Meadows en Edinburgh, hacia 5 Abr – 5 May.