September Weather in Arraiolos, Portugal

Last updated: August 27, 2025

In September, the average temperature in Arraiolos, Portugal is a pleasant 23°C (73°F), with a range that can dip to a cool 9°C (48°F) and peak at a sweltering 38°C (100°F). Visitors can expect approximately 25 mm (1.0 in) of rainfall spread over 3 days, accompanied by an average humidity of 67%. Ideal for those looking to enjoy a warm and slightly humid climate!

September Temperature in Arraiolos

In September in Arraiolos, the average temperature is 23°C (73°F). Maximums can reach 38°C (100°F), while minimums can drop as low as 9°C (48°F). Pack accordingly to enjoy a comfortable stay, as temperatures can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Arraiolos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arraiolos, September typically has an average temperature of 23°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in Arraiolos

In Arraiolos in September, the precipitation amount is 25 mm (1.0 in) over the course of 3 days.

September Precipitation Trends in Arraiolos

The chart displays monthly precipitation patterns in Arraiolos, 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 Arraiolos, September typically receives around 25 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.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Arraiolos

In Arraiolos in September humidity is 67%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket that makes the air feel thick and slightly sticky, which can be challenging for travelers who prefer cooler, drier conditions.

September Average Humidity in Arraiolos

This chart illustrates the average monthly humidity levels in Arraiolos, 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 Arraiolos 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 Arraiolos

In Arraiolos in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Arraiolos.

Maximum UV Index Levels in Arraiolos for September

The chart shows the monthly maximum UV Index (UVI) for Arraiolos 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 Arraiolos typically reaches 9, which falls under the very high exposure category.

Data source: Arraiolos 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 Arraiolos Compares to Other Months

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

This table compares monthly weather conditions in Arraiolos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	34 mm (1.3 inches)	85%	moderate
February Weather	12°C (53°F)	51 mm (2.0 inches)	75%	moderate
March Weather	13°C (55°F)	91 mm (3.6 inches)	72%	high
April Weather	15°C (59°F)	88 mm (3.5 inches)	70%	very high
May Weather	19°C (66°F)	39 mm (1.5 inches)	70%	very high
June Weather	21°C (70°F)	15 mm (0.6 inches)	63%	extreme
July Weather	24°C (75°F)	5 mm (0.2 inches)	60%	very high
August Weather	24°C (76°F)	5 mm (0.2 inches)	60%	very high
September Weather	23°C (73°F)	25 mm (1.0 inches)	67%	very high
October Weather	19°C (66°F)	43 mm (1.7 inches)	74%	high
November Weather	13°C (56°F)	68 mm (2.7 inches)	83%	moderate
December Weather	11°C (52°F)	63 mm (2.5 inches)	85%	moderate