Porto vs Lisbon

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Lisbon edges ahead as the better destination in May. Lisbon offers 12 hours of daily sunshine with only 6 rain days, while Porto sees 12 sunshine hours and 11 rain days.

Porto sits in the comfortable travel range at 20°C. Lisbon is also comfortable at 21°C.

For travelers who prioritize dry weather, Lisbon is the stronger choice in May.

Porto reaches an average high of 20°C (68°F) and drops to 12°C (54°F) at night during May. The daily temperature range is 8°C, meaning moderate variation throughout the day.

Lisbon averages 21°C (70°F) for the high and 14°C (57°F) for the low, with a daily range of 7°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in May.

Porto receives approximately 102 mm of rainfall across 11 rain days during May. You can expect rain roughly every other day.

Lisbon sees 44 mm over 6 rain days. That makes Lisbon the drier option by 5 rain days and 58 mm of total precipitation.

Both cities share similar humidity levels at 65%.