September Weather in Salir do Porto, Portugal

Last updated: August 27, 2025

In September, the average temperature in Salir do Porto, Portugal hovers around 19°C (67°F). Expect minimums of 14°C (58°F) and maximums peaking at 30°C (86°F). With an average humidity of 67%, you'll feel the warmth and moisture in the air. Over the course of the month, anticipate around 24 mm (1.0 in) of precipitation across just 3 days.

September Temperature in Salir do Porto

In September in Salir do Porto, the average temperature is 19°C (67°F). The maximum can reach 30°C (86°F) and the minimum can be as low as 14°C (58°F). This moderate climate makes it a perfect time for outdoor activities and exploring the local sights.

September Weather in Salir do Porto: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Salir do Porto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Salir do Porto, September typically has an average temperature of 19°C (67°F), with highs reaching up to 30°C (86°F) and lows dropping to around 14°C (58°F).

Data source: Temperature data for Salir do Porto generated using information from the Copernicus Climate Change Service.

September Precipitation in Salir do Porto

In Salir do Porto in September, the total precipitation amount is 24 mm (1.0 in) accumulated over a period of 3 days.

September Precipitation Trends in Salir do Porto

The chart displays monthly precipitation patterns in Salir do Porto, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Salir do Porto, September typically receives around 24 mm (1.0 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Salir do Porto

In Salir do Porto in September, humidity is 67%. With an average temperature of 19°C (67°F), this humidity feels like walking through a warm, soft blanket, making sightseeing and outdoor activities a bit more challenging but still enjoyable for those prepared with light clothing and plenty of hydration.

September Average Humidity in Salir do Porto

This chart illustrates the average monthly humidity levels in Salir do Porto, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Salir do Porto is approximately 67%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Salir do Porto

In Salir do Porto in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Salir do Porto.

Maximum UV Index Levels in Salir do Porto for September

The chart shows the monthly maximum UV Index (UVI) for Salir do Porto in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Salir do Porto typically reaches 8, which falls under the very high exposure category.

Data source: Salir do Porto September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Salir do Porto Compares to Other Months

Weather in Salir do Porto varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Salir do Porto, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Salir do Porto, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	50 mm (2.0 inches)	85%	moderate
February Weather	13°C (56°F)	55 mm (2.1 inches)	75%	moderate
March Weather	13°C (57°F)	73 mm (2.9 inches)	72%	high
April Weather	15°C (59°F)	80 mm (3.1 inches)	70%	very high
May Weather	17°C (63°F)	39 mm (1.5 inches)	70%	very high
June Weather	18°C (65°F)	24 mm (1.0 inches)	63%	extreme
July Weather	19°C (67°F)	12 mm (0.5 inches)	60%	very high
August Weather	20°C (68°F)	7 mm (0.3 inches)	60%	very high
September Weather	19°C (67°F)	24 mm (1.0 inches)	67%	very high
October Weather	18°C (64°F)	69 mm (2.7 inches)	74%	high
November Weather	15°C (59°F)	91 mm (3.6 inches)	83%	moderate
December Weather	13°C (56°F)	73 mm (2.9 inches)	85%	moderate