April weather forecast and climate
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

Weather in April

April, like March, in Lisbon, Portugal, is another comfortable spring month, with average temperature fluctuating between 11.9°C (53.4°F) and 19.8°C (67.6°F).

Temperature

In Lisbon, Portugal, the average high-temperature is almost the same as in March - a still comfortable 19.8°C (67.6°F). In Lisbon, in April, the average low-temperature is 11.9°C (53.4°F).

Rainfall

In Lisbon, during 11 rainfall days, 68.1mm (2.68") of precipitation is typically accumulated. Throughout the year, in Lisbon, Portugal, there are 112 rainfall days, and 774mm (30.47") of precipitation is accumulated.

Sea temperature

In April, the average sea temperature is 16.3°C (61.3°F).
Note: For swimming, a surface water temperature of 16.3°C (61.3°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

The average length of the day in Lisbon is 13.2h.

Sunshine

In April, the average sunshine in Lisbon, Portugal, is 8h.

UV index

In April, the average daily maximum UV index in Lisbon is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in April transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

How much does it rain in Lisbon in April?

In Lisbon, during April, the rain falls for 11 days and regularly aggregates up to 68.1mm (2.68") of precipitation.

What is the sea temperature in April in Lisbon?

In April, the average sea temperature in Lisbon, Portugal, is 16.3°C (61.3°F). For most, swimming in 16.3°C (61.3°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

How many hours of daylight does Lisbon have in April?

In April, the average length of the day in Lisbon, Portugal, is 13.2h.

How long on average sun shines in April in Lisbon?

In April, the average sunshine in Lisbon, Portugal, is 8h.

How high is the UV index in April in Lisbon?

The average daily maximum UV index in April is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.

Average temperature in April
Lisbon, Portugal

Average temperature in April - Lisbon, Portugal
  • Average high temperature in April: 19.8°C

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).

  • Average low temperature in April: 11.9°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).

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Average rainfall in April
Lisbon, Portugal

Average rainfall in April - Lisbon, Portugal
  • Average rainfall in April: 68.1mm

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

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Average rainfall days in April
Lisbon, Portugal

Average rainfall days in April - Lisbon, Portugal
  • Average rainfall days in April: 11 days

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

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Average sea temperature in April
Lisbon, Portugal

Average sea temperature in April - Lisbon, Portugal
  • Average sea temperature in April: 16.3°C

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).

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Average daylight in April /
Average sunshine in April
Lisbon, Portugal

Average daylight in April / Average sunshine in April - Lisbon, Portugal
  • Average daylight in April: 13.2h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in April: 8h

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

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Average UV index in April
Lisbon, Portugal

Average UV index in April - Lisbon, Portugal
  • Average UV index in April: 6

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).

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