Portugal Lisbon Weather in May — Climate Guide
May in Lisbon is Excellent
May is Excellent for Lisbon.
May is full spring tilting summer. Daytime 22°C, nighttime 14°C, 14-15 hours daylight.
Jacaranda trees (introduced from Brazil 1920s) bloom purple mid-May to mid-June — Largo do Carmo + Avenida Dom Carlos I are the iconic photo spots. The most-photogenic Lisbon month.
Travel score
Lisbon May Weather Stats
Avg High
22°C
Avg Low
14°C
Rainy Days
7
45mm total
Sunshine
9.6h
Daily avg
Humidity
64%
Comfortable
UV Index
7
High
Wind
11 km/h
Gusts 24
Sea Temp
17°C
Cool
Crowds
Busy
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
11 μg/m³
PM10
20 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
22°C
Nighttime
13°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 24 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- Jacaranda purple bloom (mid-May)
- Best weather + 15-hour daylight
- Outdoor everything
Cons
- Hotel rates at peak
- Tourist crowds at maximum
- Pena Palace 4-6 weeks ahead booking
May Events & Festivals
- Jacaranda blossom peak (mid-May)
- Fátima pilgrimage (May 13)
- Hotel rates at peak
Lisbon in May — Full Picture
May is full spring tilting summer. Daytime 22°C, nighttime 14°C, 14-15 hours daylight.
Jacaranda trees (introduced from Brazil 1920s) bloom purple mid-May to mid-June — Largo do Carmo + Avenida Dom Carlos I are the iconic photo spots. The most-photogenic Lisbon month.
Fátima pilgrimage (May 13) — 600,000+ pilgrims walk to Fátima sanctuary 130km north. Lisbon hotels not directly affected but trains crowded.
What to Wear & What to Pack
T-shirts + light cardigan. Long pants over shorts. Light jacket for evenings. Sunglasses + sunscreen.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current19.3°C
12°C
8.7/mo
Summer (Jun·Jul·Aug)
27°C
17.7°C
1.7/mo
Autumn (Sep·Oct·Nov)
21.7°C
14°C
8/mo
Winter (Dec·Jan·Feb)
14.3°C
8.3°C
12.3/mo
Lisbon Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 14° | 8° | 14d·110mm | 4.6h | 76% | 2 | Quiet | Low season | |
| 15° | 8° | 11d·80mm | 5.9h | 73% | 3 | Quiet | Low season | |
| 17° | 10° | 10d·60mm | 6.9h | 70% | 4 | Moderate | Shoulder | |
| April (Best) | 19° | 12° | 9d·60mm | 8.1h | 67% | 5 | Busy | Peak |
| May (Best) | 22° | 14° | 7d·45mm | 9.6h | 64% | 7 | Busy | Peak |
| June (Best) | 25° | 17° | 3d·16mm | 11h | 64% | 8 | Very busy | Peak |
| July (Best) | 28° | 18° | 1d·4mm | 11.5h | 60% | 9 | Very busy | Peak |
| August (Best) | 28° | 18° | 1d·6mm | 11h | 60% | 9 | Very busy | Peak |
| September (Best) | 26° | 17° | 4d·25mm | 9h | 65% | 7 | Busy | Peak |
| 22° | 14° | 8d·80mm | 6.6h | 71% | 4 | Moderate | Shoulder | |
| 17° | 11° | 12d·130mm | 5h | 78% | 2 | Moderate | Shoulder | |
| 14° | 9° | 12d·110mm | 4.6h | 77% | 2 | Moderate | Peak |
View Other Months
Lisbon May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Lisbon?
Lisbon in May is Excellent. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Lisbon in May?
Lisbon May averages a high of 22°C and a low of 14°C.
Does it rain much in Lisbon in May?
Lisbon May averages 45mm of rainfall over about 7 rainy days.
What should I wear in Lisbon in May?
T-shirts + light cardigan. Long pants over shorts. Light jacket for evenings. Sunglasses + sunscreen.
What time are sunrise and sunset in Lisbon in May?
Lisbon May sunrise is 06:30 and sunset is 20:50, with 14h 20m of daylight.
What's the air quality like in Lisbon in May?
Lisbon May air quality (AQI) averages 34, rated Good. PM2.5 averages 11μg/m³.
What activities are recommended in Lisbon in May?
In May, Lisbon is great for Jacaranda photo walks (mid-May), Outdoor terraces, Sintra Pena Palace + gardens.
Is May peak season in Lisbon?
Lisbon May crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Lisbon
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.