Weather in Lisbon

Lisbon is in Portugal at 38.7°N. The 2001–2020 NASA POWER daily record describes a Mediterranean pattern: dry summers and wetter winters. Rain is wet season runs from October to January, inside an annual total of 541 mm. The wettest month is November at 92 mm; the driest is July at 3 mm.

August is the warmest month (average 20.7°C, high 23.3°C) and February is the coolest (average 12.8°C, low 10.9°C). From the coolest night in February (10.9°C) to the hottest afternoon in August (23.3°C), the raw range is 12.4°C. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are June, July, and August.

Hot and cool months in Lisbon

The heat peaks in August, when the typical afternoon is 23.3°C. The opposite pole is February, when mornings average 10.9°C.

Mean high across all twelve months is 18.8°C and mean low is 14.6°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Rain through the year

The wet season in Lisbon starts in October and ends in January (October, November, December, and January). November is the core of it at 92 mm. July is the other extreme, with 3 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. November averages 13 such days; July averages 1.

Distinctive months in Lisbon

The year bottoms out in February. Plan for 10.9°C at night and 14.8°C in the afternoon. July is the driest month, averaging only 3 mm across 1 rainy days. Highs sit near 22.5°C. Peak heat arrives in August: 23.3°C by day, 18.2°C at night, and 81% humidity.

October is when the wet season typically starts in Lisbon: highs near 20.7°C, and rainfall jumps to 80 mm (11 rainy days). November is the wettest month — 92 mm and 13 rainy days, with 80% humidity.

Best months to visit Lisbon

The three months with the highest comfort score are June, July, and August: June (19.0°C average, 11 mm, 80% humidity); July (20.1°C average, 3 mm, 81% humidity); August (20.7°C average, 6 mm, 81% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at October–January instead of the score.

How Lisbon compares inside Portugal

Lisbon is the only Portugal city in this dataset, so the figures on this page are the national sample we publish. They still come from the same NASA POWER daily series (2001–2020) used everywhere else on the site.