Lisbon Weather by Month: What to Expect and Pack

Lisbon has mild, wetter winters and warm, very dry summers. At the city’s Instituto Geofísico station, the 1991–2020 average high runs from 59°F (15.1°C) in January to 84°F (28.8°C) in August. November has the highest average monthly rainfall; July has almost none.

Those figures describe climate, not the weather on a booked Tuesday. Averages smooth out heat waves, cool spells, and concentrated downpours. Use this guide to build the suitcase and a flexible outline, then check the IPMA Lisbon forecast shortly before departure.

Lisbon Weather by Month at a Glance

The table uses IPMA’s official 1991–2020 climate normal for Lisboa/Instituto Geofísico. Temperatures are average daily maximums and minimums; rainfall is an average monthly total. Fahrenheit and inches are rounded for easier US trip planning.

Lisbon in Winter: December, January, and February

December: mild afternoons, damp evenings

December averages 60°F (15.4°C) by day and 49°F (9.4°C) at night, with about 4.3 inches (109 mm) of rain. A sweater under a waterproof jacket is more useful than an expedition-weight coat. Pack closed shoes with tread for wet calçada pavement, and keep an indoor museum or long lunch ready when a shower makes a viewpoint less persuasive.

January: coolest on average

January has the year’s lowest average high, 59°F (15.1°C), and an average low of 47°F (8.6°C). The surprise is often indoors. Public traveler discussions repeatedly describe older apartments feeling colder than the outdoor number because insulation and heating vary. That is not true of every hotel, but it is worth checking recent reviews for heating and packing warm sleepwear for a rental.

February: slightly warmer, still changeable

February rises to an average high of 62°F (16.4°C), while rainfall drops to about 3.1 inches (78 mm). It can deliver a bright lunch outdoors and a wet, windy walk home on the same trip. Use removable layers: long sleeves, a sweater, and a light waterproof shell. A rigid all-outdoor schedule is the item to leave behind.

Lisbon in Spring: March, April, and May

March: warming, not reliably warm

March averages 66°F (18.9°C) by day and 52°F (11°C) at night. Rain remains possible, with about 2.7 inches (69 mm) across the month. Pack a light jacket and a compact rain layer, not twelve versions of spring. On cooler days, group nearby sights from the guide to the best things to do in Lisbon and avoid crossing the city between showers.

April: the suitcase needs range

April’s average high reaches 69°F (20.4°C), but the average low is 54°F (12.3°C), and monthly rain is similar to March. A T-shirt, thin knit, and water-resistant jacket cover more situations than one bulky coat. Public packing discussions frequently warn that a sunny afternoon can feel warmer than expected where shade is scarce; sunscreen belongs beside the umbrella.

May: warm days, cooler late hours

May averages 74°F (23.1°C) by day and 58°F (14.4°C) at night. Bring breathable daytime clothes, sunglasses, a hat, and one light layer for evenings or riverfront wind. Rainfall averages 2.3 inches (58 mm), so abandoning rain protection entirely is premature. A packable shell can spend the trip compressed, which is still better than spending one downpour buying another umbrella.

Lisbon in Summer: June, July, and August

June: dry, sunny, and increasingly hot

June averages 79°F (26.1°C) by day, 62°F (16.8°C) at night, and only 0.6 inch (14 mm) of rain. Favor linen, cotton, or other breathable fabrics, plus a hat, sunscreen, and a reusable bottle. A thin overshirt earns its place for wind, strong air-conditioning, and later dinners. Rain gear can be minimal, but the forecast still gets the final vote.

July: very dry, with real heat risk

July’s average high is 83°F (28.2°C), yet the IPMA normal also records roughly eight days in the month reaching at least 86°F (30°C). Heat waves can go well above the average. Schedule steep outdoor walks earlier, reserve shaded or indoor options for midafternoon, and carry more water than the photogenic bottle suggests. The 0.1-inch (3 mm) rainfall average is not a sun-safety policy.

August: hottest averages and warm nights

August averages 84°F (28.8°C) by day and 66°F (18.8°C) at night, with almost no rain. Lightweight clothing and serious sun protection do the work; a very thin layer handles breezy waterfront evenings. If a coastal escape is part of the plan, the guide to beaches near Lisbon explains why Atlantic wind and water conditions matter more than the city temperature.

Lisbon in Fall: September, October, and November

September: summer warmth with returning rain

September still averages 80°F (26.6°C) by day and 64°F (17.6°C) at night. Average rain climbs to 1.5 inches (39 mm): modest beside November, but noticeably more than August. Pack summer clothes, a light layer, and a compact waterproof shell. Check the short-range forecast before treating the whole month as borrowed August.

October: the weather pivot

October’s average high is a comfortable 73°F (22.8°C), but average rainfall jumps to 4.4 inches (111 mm). Rain may arrive in concentrated episodes rather than a polite daily drizzle. Closed shoes with grip, a light sweater, and a waterproof jacket form the useful middle ground. Make one outdoor plan and one indoor substitute for each half day instead of scheduling both.

November: wettest average month

November averages 65°F (18.1°C) by day and 53°F (11.8°C) at night, with the highest monthly rainfall in the 1991–2020 normal: 5.3 inches (134 mm). This does not mean continuous rain. It means a traveler should expect wet spells and preserve flexibility. A waterproof outer layer, grippy shoes, and a warm midlayer solve more than a heavy coat without rain protection.

Four Lisbon Weather Realities Averages Miss

Rain changes the hills

Lisbon’s polished stone paving can become slick, especially on slopes. Public discussions mention this far more often than dramatic cold. Choose broken-in shoes with useful tread and take a tram, Metro ride, or taxi when a steep descent becomes a small municipal skating event.

Indoor temperature deserves a question

In winter, ask whether the accommodation has effective heating; in summer, ask about air-conditioning if sleeping hot is a concern. The Lisbon neighborhood guide helps with location, but recent property reviews are the better source for a particular room.

Waterfront wind edits the outfit

Belém, the Tagus riverfront, and Atlantic day trips can feel cooler or windier than sheltered central streets. One light, packable layer handles that difference without turning a summer suitcase into a winter archive.

The forecast should finish the packing list

Climate normals are the starting point. Three to seven days before departure, check IPMA for daily highs, lows, rain probability, wind, and active warnings, then remove what the actual pattern does not support. The broader Europe packing list covers the non-weather essentials.

This guide deliberately does not rank months by prices, crowds, festivals, or overall value. Those decisions belong in the planned guide to the best time to visit Lisbon. Here, the answer is simpler: pack for the monthly range, respect the live forecast, and keep one indoor Plan B that does not feel like punishment.

Frequently Asked Questions

What is the weather like in Lisbon by month?

Lisbon has mild, wetter winters and warm, very dry summers. The 1991-2020 average high runs from 59F (15.1C) in January to 84F (28.8C) in August, based on IPMA's official climate normal.

What month has the most rain in Lisbon?

November has the highest average monthly rainfall in Lisbon, while July has almost none, based on the IPMA Instituto Geofisico climate normal.