Lisbon vs Porto

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.

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

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

Lisbon reaches an average high of 21°C (70°F) and drops to 14°C (57°F) at night during May. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Porto averages 20°C (68°F) for the high and 12°C (54°F) for the low, with a daily range of 8°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.

Lisbon receives approximately 44 mm of rainfall across 6 rain days during May. Rain is occasional, so a light rain jacket should suffice.

Porto sees 102 mm over 11 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%.