September weather forecast
Vilamoura, Portugal

September starts to hint at cooler temperature changes as Vilamoura, Portugal leaves the peak summer months behind. Rainfall sees a slight increase, with the amount of precipitation rising to 15mm (0.59"), a significant uptick from 2mm (0.08") in August. Despite the cooler nights, the warm daytime temperature that fluctuates from 27°C (80.6°F) during the day to 17°C (62.6°F) at night, maintains a comfortable balance. A gradual reduction in the UV index to 7 indicates softer sunlight as the region transitions into the autumn season.

Temperature

September's weather in Vilamoura, Portugal, displays an average high-temperature of a still moderately hot 27°C (80.6°F), slightly varied from August's 28°C (82.4°F). In September, the recorded average low-temperature in Vilamoura is an enjoyable 17°C (62.6°F).

Rainfall

In September, in Vilamoura, the rain falls for 2 days. Throughout September, 15mm (0.59") of precipitation is accumulated. In Vilamoura, during the entire year, the rain falls for 77 days and collects up to 557mm (21.93") of precipitation.

Sea temperature

The months with the warmest seawater are August and September, with an average sea temperature of 21°C (69.8°F).
Note: For the majority of people, swimming in water at 21°C (69.8°F) is not enjoyable. The challenge of controlling breathing escalates as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September in Vilamoura, sunrise is at 07:03 and sunset at 20:00. On the last day of the month, sunrise is at 07:27 and sunset at 19:17 WEST.

Sunshine

The average sunshine in September is 9h.

UV index

In Vilamoura, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 in September translates into this advice:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.