Lisbon Weather in May
Portugal · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Lisbon sees average temperatures ranging from a low of 14.6°C (58.3°F) to a high of 23.4°C (74.1°F), with a mean of 18.4°C (65.1°F). Compared to the annual average of 17.2°C (63.0°F), this month is 1.2°C warmer than the yearly norm. Precipitation averages 23.0mm, making it approximately 26.0mm drier than the monthly average of 49.0mm. The city receives an average of 12.4 hours of sunshine per day during May, with relative humidity averaging 68.9%. Wind speeds reach an average maximum of 21.1 km/h. For travelers, this month offers a temperature experience in Lisbon, with drier-than-average conditions compared to the rest of the year.
Lisbon's hills plus humidity make packing an art form. I showed up in July in linen — big mistake, the UV hits 9 and the city is essentially a suntrap. Pack breathable layers, a wide-brim hat, and the strongest SPF you own. My ideal window is mid-September to mid-October: 24°C, fewer crowds, and the Tagus breeze actually feels good. Skip February — it's wetter than you'd think. Tram 28 in summer is a sweatbox; ride it in November instead, when it's 16°C and the queues vanish.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 15.8°C (60.4°F) | 18.4°C (65.1°F) | 20.1°C (68.2°F) |
| Rainfall | 60.7mm | 23.0mm | 22.9mm |
| Sunshine | 11.0 hrs | 12.4 hrs | 13.2 hrs |
| Humidity | 74.6% | 68.9% | 71.5% |
| Wind | 19.9 km/h | 21.1 km/h | 20.8 km/h |
| Rainy Days | 15.0 | 10.0 | 10.0 |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Lisbon in May, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Lisbon in May?
The average temperature in Lisbon during May ranges from 14.6°C (58.3°F) to 23.4°C (74.1°F), with a mean of 18.4°C (65.1°F).
How much does it rain in Lisbon in May?
Lisbon receives an average of 23.0mm of precipitation in May, spread across approximately 10.0 rainy days.
What should I pack for Lisbon in May?
Based on May weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is May a good time to visit Lisbon?
May is a good time to visit Lisbon, with comfortable temperatures and manageable rainfall.
Other Months for Lisbon
Cities with Similar May Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 38.72°, -9.14°. Timezone: Europe/Lisbon. Last updated: 2026-07-30.