October weather forecast
Cascais, Portugal

October introduces the city of Cascais to noticeable autumnal changes, with gradually cooler temperatures than those observed in September. Drawing in more moisture, the rainfall jumps to 89mm (3.5"), creating a palpable shift from the drier summer months. The declining hours of daylight and leveling-off sea temperatures set the stage for more peaceful and quiet late autumn months. Despite these changes, October still delivers several pleasing mild and sunny days.

Temperature

The start of October involves a subtle temperature drop, shifting from a moderately hot 26°C (78.8°F) in September to a pleasant 22°C (71.6°F). Cascais's nights in October experience an average temperature drop to a moderate 14°C (57.2°F).

Rainfall

In October, the rain falls for 11 days. Throughout October, 89mm (3.5") of precipitation is accumulated. In Cascais, during the entire year, the rain falls for 116 days and collects up to 841mm (33.11") of precipitation.

Sea temperature

In Cascais, in October, the average water temperature is 19.8°C (67.6°F).
Note: Swimming in water with a temperature of 19.8°C (67.6°F) is not a pleasurable experience for the majority. As the temperature falls below 21°C (69.8°F), it becomes increasingly hard to control one's breathing.

Daylight

In October, the average length of the day is 11h and 11min.
On the first day of October in Cascais, Portugal, sunrise is at 07:34 and sunset at 19:20 WEST. On the last day of the month, sunrise is at 07:04 and sunset at 17:38 WET.
Note: On Sunday, 27. October 2024, at 02:00, Daylight Saving Time ends, and the time zone changes from WEST to WET. Daylight Saving Time starts again on Sunday, 30. March 2025, at 01:00; consequently, the time zone reverts from WET to WEST.

Sunshine

The average sunshine in October in Cascais is 7h.

UV index

In Cascais, Portugal, the average daily maximum UV index in October is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In October, the average maximum UV index of 4 translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.