September Weather in Alcacer do Sal, Portugal

Last updated: August 27, 2025

In Alcacer do Sal, Portugal, the average temperature in September hovers around 22°C (71°F), offering a pleasant climate. However, be prepared for a range, as temperatures can dip to a cool 10°C (51°F) and soar to a hot 38°C (100°F). Rainfall is light, with only 18 mm (0.7 in) expected over 2 days, and the average humidity sits at a comfortable 67%.

September Temperature in Alcacer do Sal

In September in Alcacer do Sal, the average temperature is 22°C (71°F). Maximums can reach 38°C (100°F) and minimums can be as low as 10°C (51°F). This makes Alcacer do Sal an ideal destination for travelers seeking a warm getaway during the day while enjoying cooler evenings.

September Weather in Alcacer do Sal: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Alcacer do Sal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alcacer do Sal, September typically has an average temperature of 22°C (71°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (51°F).

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

September Precipitation in Alcacer do Sal

In Alcacer do Sal in September, the precipitation amount is 18 mm (0.7 in) over the course of 2 days.

September Precipitation Trends in Alcacer do Sal

The chart displays monthly precipitation patterns in Alcacer do Sal, 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 Alcacer do Sal, September typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 2 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 Alcacer do Sal

In Alcacer do Sal in September, humidity is 67%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet slightly uncomfortable, as the air hangs thick, reminding travelers to stay hydrated and seek shade during the midday sun.

September Average Humidity in Alcacer do Sal

This chart illustrates the average monthly humidity levels in Alcacer do Sal, 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 Alcacer do Sal 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 Alcacer do Sal

In Alcacer do Sal 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 Alcacer do Sal.

Maximum UV Index Levels in Alcacer do Sal for September

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

Data source: Alcacer do Sal 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 Alcacer do Sal Compares to Other Months

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

This table compares monthly weather conditions in Alcacer do Sal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	30 mm (1.2 inches)	85%	moderate
February Weather	12°C (55°F)	52 mm (2.0 inches)	75%	moderate
March Weather	14°C (57°F)	81 mm (3.2 inches)	72%	high
April Weather	15°C (60°F)	73 mm (2.9 inches)	70%	very high
May Weather	19°C (66°F)	30 mm (1.2 inches)	70%	very high
June Weather	20°C (69°F)	9 mm (0.4 inches)	63%	extreme
July Weather	22°C (72°F)	3 mm (0.1 inches)	60%	very high
August Weather	23°C (74°F)	2 mm (0.1 inches)	60%	very high
September Weather	22°C (71°F)	18 mm (0.7 inches)	67%	very high
October Weather	19°C (66°F)	42 mm (1.6 inches)	74%	high
November Weather	14°C (58°F)	56 mm (2.2 inches)	83%	moderate
December Weather	12°C (54°F)	49 mm (1.9 inches)	85%	moderate