The best months to visit Lisbon are April, May, June, September and October, when average highs sit in the comfortable low-to-mid 20s and rain thins out — May reaches 22.8 °C with just 5 rain days, and September holds 26.4 °C with 4 rain days. July and August are peak season: they are hotter (28.8 °C in August) and drier, but coincide with school holidays and the city's busiest crowds. Winter is the quiet, low season — mild at 14.9 °C in January but wetter and with shorter days at 7.5 hours of sunshine.
Best months AprilMayJuneSeptemberOctober
Lisbon month by month
Average highs and lows (°C), 2016–2025. Highlighted bars are the best months.
| Month | High | Low | Rain days | Sun / day |
|---|---|---|---|---|
| January | 14.9 °C | 9.1 °C | 8 | 7.5 h |
| February | 16.2 °C | 9.6 °C | 7 | 8.3 h |
| March | 17.2 °C | 10.4 °C | 10 | 9.7 h |
| April | 19.5 °C | 12 °C | 10 | 11 h |
| May | 22.8 °C | 14.4 °C | 5 | 12.4 h |
| June | 25.1 °C | 16.4 °C | 4 | 13.3 h |
| July | 28 °C | 18.2 °C | 1 | 13.4 h |
| August | 28.8 °C | 18.6 °C | 1 | 12.4 h |
| September | 26.4 °C | 17.5 °C | 4 | 11.1 h |
| October | 23.3 °C | 15.8 °C | 9 | 9.1 h |
| November | 18 °C | 12.2 °C | 11 | 7.5 h |
| December | 15.7 °C | 10.1 °C | 9 | 7.4 h |
How the months are picked.A month qualifies when its average high sits in the comfortable 20–28 °C band (scored down towards 9 °C and 37 °C), rain days are few and sunshine hours are high — at least 78 % of the city's best-scoring month. July and August are then set aside as peak season (school-holiday crowds and prices) whenever at least three other months qualify; where summer is the only comfortable window they stay. Figures are ten-year averages (2016-01-01 to 2025-12-31) from ERA5 reanalysis data via Open-Meteo (CC BY 4.0) for the city centre coordinates.
When to go, and what to expect
Spring (Mar–May)
An ideal window for walking the city and Belém Tower in mild, bright weather.
Summer (Jun–Aug)
Great for beaches, but June sidesteps the worst of the heat and crowds.
Autumn (Sep–Nov)
September and October are prime — warm sea, thinner crowds, easy sightseeing.
Winter (Dec–Feb)
Worth it for bargain-minded travellers who don't mind rain and shorter days.
Notable events
- June
- Festas de Lisboa (Santo António, with sardine grills and street parties)
- February
- Carnival
- Late spring (May–June)
- Lisbon Book Fair (Feira do Livro)
- December
- Christmas and New Year celebrations
Frequently asked
Is Lisbon too hot in August?
August is the hottest month, with average highs of 28.8 °C and only 1 rain day. It's warm but manageable near the coast — if you want cooler days, June (25.1 °C) or September (26.4 °C) are easier.
What is the rainiest month in Lisbon?
November is wettest, with 11 rain days and highs of just 18 °C. March and April also see 10 rain days, while July and August are driest at 1 rain day each.
Is winter worth visiting Lisbon?
Yes, if you want quiet and don't mind damp weather. January stays mild at 14.9 °C but brings 8 rain days and only 7.5 hours of sunshine a day, so pack for showers.
Know when to go? Now decide where to stay — our Lisbon area guide →
Areas of Lisbon
Best time to visit near here
Sources
- Open-Meteo historical weather API — monthly climate normals, 2016–2025 (CC BY 4.0)
- ERA5 reanalysis (ECMWF / Copernicus) — the underlying temperature, precipitation and sunshine data
- ReasonStay methodology — how the best months are computed and checked
An independent guide to Lisbon — honest, verified, no invented data. Climate figures: ERA5 via Open-Meteo, 2016–2025 averages; the best months are computed from them, not opinion.