Lisbon Climate & Weather Averages

Climate Insights from Our Writers

“Lisbon's hills make the city's climate feel more intense than the data suggests. I packed for July thinking linen would be appropriate, and while the fabric choice was right, I underestimated the UV index. Lisbon sits at a latitude similar to New York, but its position on the Atlantic coast creates a Mediterranean climate that's distinct from its inland neighbors. The city receives about 2700 hours of sunshine annually, making it one of the sunniest cities in Europe, and the Tagus River provides a moderating influence that keeps temperatures comfortable year-round. The data shows that August is the warmest month at 23°C, but the real story is the UV exposure — the index hits 9+ from May through August, requiring serious sun protection. The wind patterns are another factor I've studied extensively. The 'Nortada' wind from the north provides natural air conditioning during summer, dropping temperatures by 5-8°C along the coast compared to inland areas. This wind also creates excellent conditions for the sailing that's so popular in Lisbon's harbor. The rainfall pattern is distinctly Mediterranean, with most of the 750mm annual precipitation falling between October and April, and a pronounced dry season in summer. The best time to visit, based on my analysis of the data, is mid-September to mid-October, when temperatures are around 24°C, the summer crowds have dissipated, and the light has that golden quality that makes Lisbon's famous tiles glow. February is the month I consistently recommend avoiding — it's the wettest and coldest, with average temperatures around 12°C and persistent rain. The city's outdoor cafés and miradouros (viewpoints) are best enjoyed in the shoulder seasons when the weather is mild enough to sit outside without the summer crowds.”

— Climate & Travel Writer