Climate Overview
Lisbon has a Mediterranean climate with warm, dry Jul–Aug around 29°C (under 2mm rain) and mild, rainy winters near 15°C (81–97mm Nov–Feb). Humidity stays 67–83% year-round tempered by Atlantic breezes. Apr–Jun and Sep–Oct are the prime windows — warm days for tiled alleys, cool evenings for fado bars.
Monthly Climate
Temperature range, rainfall, and humidity by month
Monthly Data
| Month | High | Low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 15.9° | 10° | 150mm | 81% |
| Feb | 16.5° | 9.8° | 68mm | 84% |
| Mar | 16.7° | 10.1° | 167mm | 79% |
| Apr | 19.9° | 12.7° | 112mm | 77% |
| May | 23.3° | 14.3° | 36mm | 68% |
| Jun | 27.9° | 17.6° | 2mm | 64% |
| Jul | 29° | 18.7° | 1mm | 60% |
| Aug | 29.9° | 18.9° | 0mm | 61% |
| Sep | 26.4° | 16.7° | 16mm | 62% |
| Oct | 24.9° | 16.8° | 63mm | 71% |
| Nov | 17.9° | 11.8° | 166mm | 78% |
| Dec | 14.8° | 9.4° | 131mm | 83% |
When to Visit
Experiences to seek out and peak periods to plan around
Experiences & Highlights
Sardine grills and bunting fill Alfama, Graça and Bica all month; Santo António peaks the night of 12 June with neighbourhood parties and warm 22°C evenings.
Three-day riverside festival at Passeio Marítimo de Algés in early-to-mid July; dry, ~28°C days and 67% humidity make open-air sets easy to endure.
Rainfall drops below 30mm from June through September while highs sit 25–29°C; trains to Cascais in 40 minutes, ferry + bus to Caparica's 30km of sand.
Europe's largest tech conference fills the Altice Arena for four days in early November; expect 18°C drizzle (96mm avg) and hotel prices across the city doubling.
Peak Periods & Travel Advisories
Hottest months (avg highs 28–29°C, driest of the year at 1–2mm rainfall); Alfama miradouros queue from midday and Tram 28 runs standing-room only.
City-wide sardine festivals and the parade of marchas populares down Avenida da Liberdade; central hotels sell out weeks ahead and metro runs through the night.
70,000+ attendees descend on Parque das Nações; hotel rates spike across Lisbon and airport transfers stretch despite cool, rainy 18°C weather.
Official Resources
Government portals and tourism boards for Lisbon, Portugal