May · Portugal
Best time to visit Lisbon in May Weather, crowds & prices
Weather in Lisbon in May
Average temperature 18°C, 8 mm of rain, about 31 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
9.5/10
Ranked #2 of 12 months
- Avg temp
- 18°C
- Rainfall
- 8 mm
- Humidity
- 79%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
May in Lisbon scores 9.5/10 for sightseeing and cultural travel - one of the top 12-month picks (#2). Expect around 18°C, 8 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Hill-climbing trams, panoramic miradouros, and soft Atlantic light make April through June Lisbon at its finest.
May in Lisbon — one of the year's strongest windows (2nd)
Temperatures hover around 18°C (64°F) — the kind of month where neither heat nor cold forces the schedule.
At just 8 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 14.1 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Lisbon at 9.5/10 (2nd of 12), just behind April at 9.5/10.
Pack layers you can shed by midday plus one warm layer for the evening.
Budget for peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Lisbon in May?
- In May, Lisbon averages 18°C, 8 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 9.5/10.
- Is May a good time to visit Lisbon?
- May earns a 9.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Lisbon in May?
- Expect about 8 mm of rain in May. Average humidity is 79% and there are about 31 days with 6+ hours of sunshine.
Curated in Lisbon
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Lisbon, Portugal. Live activities and tours from GetYourGuide, matched to this destination.