April weather forecast and climate
Lisbon, Portugal

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

Temperature

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

Rainfall

In Lisbon, during April, the rain falls for 11 days and regularly aggregates up to 68.1mm (2.68") of precipitation. In Lisbon, during the entire year, the rain falls for 112 days and collects up to 774mm (30.47") of precipitation.

Sea temperature

In Lisbon, the average water 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

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

Sunshine

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

UV index

In Lisbon, Portugal, the average daily maximum UV index in April is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.