Climate and monthly weather forecast
Lisbon, Portugal

The beautiful hillside city of Lisbon in Portugal, with a high, far view of the Sao Jorge Castle
The beautiful hillside city of Lisbon in Portugal, with a high, far view of the Sao Jorge Castle

The climate of Lisbon

In the city of Lisbon, Portugal, the prevailing climate is identified as Mediterranean hot summer, as indicated by the Köppen climate classification (Csa). Characterised by warm to hot, dry summers and mild to cool, wet winters, this climate type is reflective of Lisbon's prime geographical positioning with respect to the Atlantic Ocean.

Assessing the climatological parameters recorded for the region, it is observable that temperatures fluctuate between 8.3°C to 28.3°C throughout the year. The burgeoning warmth of spring transitions into the sultry heat of summer, with the months from June to August experiencing the year's peak temperatures, reaching up to 28.3°C. Conversely, the cooler months from December to February offer a respite from this heat, with temperatures dropping to a cooler range of between 8.3°C and 15.3°C.

Rainfall predominantly takes place during the colder months, with November and December receiving the highest amounts, amassing 128mm and 127mm, respectively. On the contrary, the hot, dry summer months from July to August experience almost negligible rainfall, recording only 4mm and 6mm respectively during this period. The number of rainfall days follows a similar pattern, with an increased frequency observed during the wetter months.

As for Lisbon's sunshine and UV index, the two are interconnected. The city relishes in up to 11 hours of sunshine from June to August, coinciding with a high UV index of 9. These factors diminish as winter nears, with a decrease in daylight hours and a corresponding drop in the UV index to 2 by December.

The best time to visit Lisbon

For those planning a trip to Lisbon, the city's favourable climate lends itself to tourism throughout most of the year. However, if warm weather and long days are desired, the ideal period to visit is between early June and late August. During this timeframe, temperatures peak between 25.7°C and 28.3°C, the sea temperature averages 18.9°C to 19.6°C, and daylight extends up to 14.8 hours per day. The UV index is at its highest, as are the hours of sunshine, ensuring optimal conditions for outdoor activities.

The worst time to visit Lisbon

Visitors may prefer to avoid Lisbon during November and December when the city experiences its maximum rainfall, measuring 128mm and 127mm, respectively. These months also hold a record for the highest number of rainfall days, limiting outdoor activities. Though the temperatures during this period range from 9.4°C to 15.3°C, the shorter daylight hours and the lower amount of sunshine, coming down to five hours per day, may not be ideal for social exploration or activities.

Spring weather in Lisbon

The spring months in Lisbon, extending from March to May, herald a significant change in weather patterns. The temperatures rise from a mild 14.8°C in March to a warmer 22.1°C by May. Concurrently, rainfall decreases over these months, from 53mm to 54mm, while the number of daylight hours increases from 12.0 to an impressive 14.3. Moreover, the spring season sees a growth in the amount of daily sunshine and UV index, displaying a gentle rise through the period.

Summer weather in Lisbon

Summer in Lisbon, lasting from June to August, is characterised by soaring temperatures, lengthening daylight hours, and a noticeable decline in rainfall. The months of July and August mark the highest temperatures of the year, averaging between 28.2°C and 28.3°C. Rainfall is minimal, recording just 4mm and 6mm, and the sea warms up to an appealing 18.9°C to 19.6°C. Consequently, the UV index reaches its peak at 9, mirroring the high volume of sunshine that endures for up to 11 hours per day.

Autumn weather in Lisbon

Autumn in Lisbon, which runs from September to November, displays a gradual lowering of the temperature and an increase in rainfall. Temperatures steadily transition from a warm 26.5°C in September to a cooler 18.2°C by November. Rainfall, simultaneously, rises from 33mm to a substantial 128mm in November. While daylight hours and the amount of sunshine decrease over this season, the UV index follows a steady downward trend, beginning at 6 and ending at 3 by November's end.

Winter weather in Lisbon

Winter in Lisbon, from December to February, brings lower temperatures and increased rainfall. During these months, the temperatures hover between 8.3°C and 15.3°C while rainfall peaks in December with 127mm accompanied by the highest number of rainfall days. With shorter daylight hours and reduced sunshine, it is noteworthy that the UV index also drops to its lowest yearly average of 2. Despite the colder climate, the city remains relatively mild compared to other European regions, maintaining sea temperatures between 15.8°C to 16.6°C.

Weather in January

Starting the year off, January in Lisbon, Portugal, typically experiences chillier temperatures, a cloudy sky, and frequent rainfall. This is the time when Lisbon sees the highest rainfall of the year, with an average of 100mm recorded. Weather in January »

Weather in February

Moving into February, the weather in Lisbon starts showing the first signs of transition from winter to spring. The temperature sees a slight increase from January, however, rainfall remains frequent with an average of 14 days of downpours. Weather in February »

Weather in March

Transitioning towards spring, March in Lisbon brings a new sense of vitality to the city’s weather. There is a clear surge in the temperature, with the maximum rising to 18.8°C. This month marks one of the most significant diversions from winter, with the rainfall not only decreasing, but the city also enjoying more hours of daylight. Weather in March »

Weather in April

April exhibits renowned spring weather in Lisbon, marked by stretch in the daylight hours. The increase in sunshine showcases the city in a beautiful light, despite the occurrence of rainfall increasing to 68mm. Average sea temperatures continue with their steady climb, pushing towards the warmer end of spectrum. Weather in April »

Weather in May

The arrival of May marks the onset of the city’s summer season. Despite the rainfall decreasing to 54mm in May, sporadic showers continue to maintain Lisbon’s lush landscapes. Gradually, the city begins to warm up with temperature highs moving past the 20°C mark. Weather in May »

Weather in June

June brings forth perfect summer weather in Lisbon. The city experiences a drastic drop in rainfall, reducing to a mere average of 16mm. This significant reduction is matched with an almost equal increase in temperatures, setting the right mood for sunbathing on the coastal beaches. Weather in June »

Weather in July

July is the epitome of summer in Lisbon. The city records the highest temperature of the year, reaching an average peak of 28.2°C. Even though the city experiences a minimal amount of rain, it does not deter visitors from flocking to the beaches to enjoy the warm sea temperatures. Weather in July »

Weather in August

Riding the wave of summer, August in Lisbon continues with conditions similar to July. With the temperature reaching a peak of 28.3°C, this is the only month to rival July in terms of warmth. The rain remains a scarce occurrence, and tourists can enjoy clear blue skies above. Weather in August »

Weather in September

September sees a subtle shift in weather patterns in Lisbon, marking the beginning of the cooling down process. Despite the average temperature falling to 26.5°C, the sun continues to shine bright, albeit for fewer hours. Though the city experiences marginally more rainfall than the previous month, the weather remains conducive for outdoor activities. Weather in September »

Weather in October

October in Lisbon bears witness to the onset of autumn, with temperatures gradually declining. As the city braces for winter, rainfall frequency increases, with an average precipitation of 101mm. Despite this, Lisbon retains its charm, with alternating periods of sun and showers. Weather in October »

Weather in November

November is characterized by a noticeable shift in Lisbon’s weather as winter approaches. The temperatures drop further, signaling the city to brace for the chilly winds of December. Rainfall reaches its second-highest volume of the year, recording an average of 128mm. Weather in November »

Weather in December

During December, Lisbon finally succumbs to winter, with temperatures hitting near-year lows at around 15.3°C. Despite experiencing substantial rainfall at 127mm, Lisbon retains its charm, morphing into a winter wonderland under the Mediterranean sun. Weather in December »


What time of the year is the coldest in Lisbon?

In Lisbon, Portugal, the average lowest temperatures are observed in January, with a high of 14.8°C and a low of 8.3°C.

How much does it rain in Lisbon?

Throughout the year, in Lisbon, there are 112 rainfall days, and 774mm of precipitation is accumulated.

What are the months with the least sunshine in Lisbon?

The months with the least sunshine in Lisbon are January, February, November and December, with an average of 5h of sunshine.

What are the months with the lowest UV index in Lisbon?

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Lisbon, Portugal.

What is the month with the coldest sea water in Lisbon?

The month with the coldest seawater in Lisbon is March, with an average sea temperature of 15.1°C.

When is Daylight Saving Time (DST) in Lisbon?

On Sunday, 26. March 2023, at 01:00, Daylight Saving Time starts in Lisbon, Portugal, and the time zone changes from WET to WEST. Daylight Saving Time ends on Sunday, 29. October 2023, at 02:00, and the time zone reverts from WEST to WET.

When are the longest days in Lisbon?

The month with the longest days is June, with an average of 14h and 48min of daylight.

What are the months with the highest UV index in Lisbon?

The months with the highest UV index in Lisbon, Portugal, are June and July, with an average maximum UV index of 9.

What is the driest month in Lisbon?

July is the month with the least rainfall in Lisbon, Portugal. Rain falls for 2 days and accumulates 4mm of precipitation.

What are the months with the most sunshine in Lisbon?

The months with the most sunshine are July and August, with an average of 11h of sunshine.

What are the warmest months in Lisbon?

August is Lisbon's warmest month, registering average high temperatures of 28.3°C and lows of 18.6°C.

What month is the sea warmest in Lisbon?

With an average sea temperature of 19.9°C, September is the month with the warmest seawater in Lisbon.

What is the rainiest month in Lisbon?

The month with the most rainfall is November, when the rain falls for 13 days and typically aggregates up to 128mm of precipitation.

What is the month with the shortest days in Lisbon?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Lisbon.

Average temperature
Lisbon, Portugal

Average temperature - Lisbon, Portugal

The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (14.8°C).

The month with the highest average low temperature is August (18.6°C).
The coldest month (with the lowest average low temperature) is January (8.3°C).


Average rainfall
Lisbon, Portugal

Average rainfall - Lisbon, Portugal

The wettest month (with the highest rainfall) is November (127.6mm).
The driest month (with the least rainfall) is July (4.2mm).


Average rainfall days
Lisbon, Portugal

Average rainfall days - Lisbon, Portugal

The months with the highest number of rainy days are January, February and December (14 days).
The months with the least rainy days are July and August (2 days).


Average sea temperature
Lisbon, Portugal

Average sea temperature - Lisbon, Portugal

The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).


Average daylight / Average sunshine
Lisbon, Portugal

Average daylight / Average sunshine - Lisbon, Portugal

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The months with the most sunshine are July and August (Average sunshine: 11h).
The months with the least sunshine are January, February, November and December (Average sunshine: 5h).


Lisbon, Portugal

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