April weather forecast
Cascais, Portugal

Weather in April

April, like March, in Cascais, Portugal, is another enjoyable spring month, with temperature in the range of an average low of 11°C (51.8°F) and an average high of 18°C (64.4°F).

Temperature

In Cascais, the average high-temperature in April is practically the same as in March - a still enjoyable 18°C (64.4°F). In April, the average low-temperature is 11°C (51.8°F).

Rainfall

In Cascais, in April, it is raining for 12 days, with typically 70mm (2.76") of accumulated precipitation. Throughout the year, in Cascais, Portugal, there are 116 rainfall days, and 841mm (33.11") of precipitation is accumulated.

Sea temperature

In April, the average sea temperature is 16.3°C (61.3°F).
Note: Swimming in 16.3°C (61.3°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

The average length of the day in April in Cascais is 13h and 14min.
On the first day of April, sunrise is at 07:22 and sunset at 20:00. On the last day of the month, sunrise is at 06:41 and sunset at 20:28 WEST.

Sunshine

The average sunshine in April in Cascais is 8h.

UV index

The average daily maximum UV index in April in Cascais is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In April, the average maximum UV index of 6 translate into the following recommendations:
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 the 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.
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FAQ

How many days does it rain in April in Cascais?

In Cascais, Portugal, in April, it is raining for 12 days, with typically 70mm (2.76") of accumulated precipitation.

What is the sea water temperature in April in Cascais?

In Cascais, in April, the average water temperature is 16.3°C (61.3°F). 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).

What is the average length of the day in April in Cascais?

In Cascais, the average day length in April is 13h and 14min.

When is the sunrise / sunset in April in Cascais?

On the first day of April in Cascais, Portugal, sunrise is at 07:22 and sunset at 20:00. On the last day of the month, sunrise is at 06:41 and sunset at 20:28 WEST.

How long on average sun shines in April in Cascais?

In Cascais, the average sunshine duration in April is 8h.

What is the UV index intensity in April in Cascais?

The average daily maximum UV index in April in Cascais, Portugal, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in April
Cascais, Portugal

Average temperature in April - Cascais, Portugal
  • Average high temperature in April: 18°C

The warmest month (with the highest average high temperature) is August (27°C).
The month with the lowest average high temperature is January (14°C).

  • Average low temperature in April: 11°C

The months with the highest average low temperature are July, August and September (17°C).
The coldest month (with the lowest average low temperature) is January (8°C).

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Average rainfall in April
Cascais, Portugal

Average rainfall in April - Cascais, Portugal
  • Average rainfall in April: 70mm

The wettest month (with the highest rainfall) is January (123mm).
The driest month (with the least rainfall) is July (7mm).

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Average rainfall days in April
Cascais, Portugal

Average rainfall days in April - Cascais, Portugal
  • Average rainfall days in April: 12 days

The month with the highest number of rainy days is January (15 days).
The months with the least rainy days are July and August (2 days).

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Average sea temperature in April
Cascais, Portugal

Average sea temperature in April - Cascais, 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
Cascais, Portugal

Average daylight in April / Average sunshine in April - Cascais, Portugal
  • Average daylight in April: 13h and 14min

The month with the longest days is June (Average daylight: 14h and 50min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in April: 8h

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).

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Average UV index in April
Cascais, Portugal

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

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

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