Lisbon weather in May
May in Lisbon: nice, dry, with clean air — one of the best months to visit.
#2 of 12 months in Lisbon · #40 of 604 destinations to visit in May · comfort 92/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Lisbon climate normals — May
| Daytime high | 22°C / 72°F | 😎 nice |
|---|---|---|
| Nighttime low | 15°C / 60°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 21 mm / 0.8 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 12.4 h/day | |
| Daylight | 14.3 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Lisbon in May — FAQ
- Is May a good time to visit Lisbon?
- May in Lisbon: nice, dry, with clean air — one of the best months to visit. It ranks #2 of 12 months for Lisbon on SeasonMap's comfort score (92/100).
- What is the weather like in Lisbon in May?
- In May, Lisbon averages a daily high of 22.2°C and a low of 15.3°C, with about 20.6 mm of rain over roughly 3.8 rainy days.
- What is the air quality in Lisbon in May?
- Lisbon has a mean US Air Quality Index of about 41 in May.