Warm in May
24°C average high
avg high · 15° at night
25°C+ on 4 in 10 days
Spain
Barcelona weather in May
Is it warm? Mostly. May in Barcelona is mild: afternoons average 21°C and nights 13°C. Most days (80%) peak between 18°C and 25°C.
Mild · average high
21°C
25°C or more on about one in ten days; 20°C or more on about seven in ten days.
- Average low13°overnight
- Sea19°average, 2023–2025
- Rainy days546 mm in the month
- SkyOften cloudy50% cloud · 26% clear days
How warm it really gets
Every May afternoon from 2011–2025: 465 days. Most (80%) peaked between 18° and 25°.
May, year by year
The average May high in each year. The warmest, 2015, averaged 23°C; the coolest, 2013, 19°C.
Compared with home
Average May highs. Expect rain on about 5 days (46 mm in a typical month).
- Barcelona21°
- London17°
- Manchester16°
- Cork15°
- Dublin15°
- Glasgow15°
- Belfast14°
Warmer in May, not much further
Flying times are estimates from Dublin; Barcelona is about 2h 15m.
Mild in May
23°C average high
avg high · 16° at night
25°C+ on 2 in 10 days
Mild in May
23°C average high
avg high · 16° at night
25°C+ on 2 in 10 days
Air: ERA5 reanalysis via Open-Meteo, 2011–2025. Sea: Copernicus Marine analysis via Open-Meteo, 2023–2025. Rainy day = 2 mm or more. Clear day = average cloud cover of 30% or less. These are averages of past weather, not a forecast. Methodology