September Weather in Arouca, Portugal

Last updated: August 27, 2025

In September, the average temperature in Arouca, Portugal hovers around 19°C (66°F), with a minimum dipping to 6°C (44°F) and a maximum soaring to 33°C (92°F). Expect 57 mm (2.3 in) of precipitation spread over approximately 7 days, contributing to an average humidity level of 71%. So, be prepared for a mix of weather as you enjoy your time in this vibrant locale!

September Temperature in Arouca

In September in Arouca, the average temperature is 19°C (66°F). Maximums can reach 33°C (92°F), and minimums can be as low as 6°C (44°F). This variation makes it essential for travelers to pack versatile clothing to comfortably enjoy the diverse weather conditions.

September Weather in Arouca: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Arouca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arouca, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (44°F).

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

September Precipitation in Arouca

In Arouca in September, the precipitation amount is 57 mm (2.3 in) over a span of 7 days.

September Precipitation Trends in Arouca

The chart displays monthly precipitation patterns in Arouca, 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 Arouca, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Arouca

In Arouca in September humidity is 71%. With an average temperature of 19°C (66°F), this humidity feels like a warm, balmy embrace that enhances the tropical atmosphere, making it a perfect backdrop for leisurely strolls and outdoor adventures, though it may also lead to a slightly sticky feeling as you explore.

September Average Humidity in Arouca

This chart illustrates the average monthly humidity levels in Arouca, 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 Arouca is approximately 71%, 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 Arouca

In Arouca 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 Arouca.

Maximum UV Index Levels in Arouca for September

The chart shows the monthly maximum UV Index (UVI) for Arouca 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 Arouca typically reaches 8, which falls under the very high exposure category.

Data source: Arouca 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 Arouca Compares to Other Months

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

This table compares monthly weather conditions in Arouca, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	104 mm (4.1 inches)	87%	low
February Weather	9°C (49°F)	165 mm (6.5 inches)	81%	moderate
March Weather	10°C (51°F)	172 mm (6.8 inches)	78%	high
April Weather	13°C (55°F)	177 mm (6.9 inches)	79%	very high
May Weather	16°C (61°F)	96 mm (3.8 inches)	78%	very high
June Weather	17°C (63°F)	71 mm (2.8 inches)	71%	extreme
July Weather	20°C (68°F)	30 mm (1.2 inches)	63%	very high
August Weather	20°C (69°F)	23 mm (0.9 inches)	64%	very high
September Weather	19°C (66°F)	57 mm (2.3 inches)	71%	very high
October Weather	15°C (60°F)	127 mm (5.0 inches)	79%	high
November Weather	10°C (51°F)	189 mm (7.4 inches)	86%	moderate
December Weather	9°C (48°F)	231 mm (9.1 inches)	87%	low