Porto weather in May
May in Porto: nice, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Porto · #110 of 604 destinations to visit in May · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Porto climate normals — May
| Daytime high | 21°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 56°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 56 mm / 2.2 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 12 h/day | |
| Daylight | 14.5 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Porto in May — FAQ
- Is May a good time to visit Porto?
- May in Porto: nice, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Porto on SeasonMap's comfort score (89/100).
- What is the weather like in Porto in May?
- In May, Porto averages a daily high of 21.4°C and a low of 13.3°C, with about 56 mm of rain over roughly 8.2 rainy days.
- What is the air quality in Porto in May?
- Porto has a mean US Air Quality Index of about 45 in May.