September Weather in Altura, Portugal

Last updated: August 27, 2025

In September, the average temperature in Altura, Portugal is a pleasant 24°C (75°F). Expect minimum temperatures to dip to 13°C (56°F) and peak at 35°C (95°F). Be prepared for a bit of moisture, as precipitation reaches 19 mm (0.8 in), typically spread over 1 day. The average humidity hovers around 71%, adding a tropical feel to the warm days.

September Temperature in Altura

In September in Altura, the average temperature is 24°C (75°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 13°C (56°F). This makes it an ideal time for travelers to enjoy a pleasant climate while exploring the area.

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

The chart illustrates September temperature patterns in Altura, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altura, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (95°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Altura

In Altura in September, the precipitation amount is 19 mm (0.8 in) over the course of 1 day.

September Precipitation Trends in Altura

The chart displays monthly precipitation patterns in Altura, 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 Altura, September typically receives around 19 mm (0.8 inches) of precipitation spread over approximately 1 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 Altura

In Altura in September, humidity is 71%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making outdoor activities for traveling both refreshing and sometimes a bit stifling, prompting travelers to seek shaded spots or refreshing drinks while exploring.

September Average Humidity in Altura

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

In Altura 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 Altura.

Maximum UV Index Levels in Altura for September

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

Data source: Altura 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 Altura Compares to Other Months

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

This table compares monthly weather conditions in Altura, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	22 mm (0.9 inches)	80%	moderate
February Weather	13°C (55°F)	38 mm (1.5 inches)	73%	moderate
March Weather	14°C (58°F)	54 mm (2.1 inches)	71%	high
April Weather	16°C (61°F)	55 mm (2.2 inches)	69%	very high
May Weather	20°C (68°F)	19 mm (0.8 inches)	69%	very high
June Weather	22°C (73°F)	5 mm (0.2 inches)	67%	extreme
July Weather	25°C (78°F)	2 mm (0.1 inches)	69%	very high
August Weather	26°C (79°F)	1 mm (0.0 inches)	68%	very high
September Weather	24°C (75°F)	19 mm (0.8 inches)	71%	very high
October Weather	20°C (68°F)	25 mm (1.0 inches)	75%	high
November Weather	15°C (59°F)	54 mm (2.1 inches)	78%	moderate
December Weather	13°C (55°F)	37 mm (1.4 inches)	81%	moderate