September Weather in Caxias, Portugal

Last updated: August 27, 2025

In September, the average temperature in Caxias, Portugal hovers around 20°C (68°F), with a minimum dipping to 14°C (58°F) and a maximum soaring to 29°C (84°F). Expect a moderate precipitation of 27 mm (1.1 in) over the course of 2 days, contributing to an average humidity level of 67%.

September Temperature in Caxias

In September in Caxias, the average temperature is 20°C (68°F). Maximum temperatures can reach 29°C (84°F), while minimums can drop to as low as 14°C (58°F). This mild climate makes Caxias an ideal destination for travelers looking to enjoy comfortable outdoor activities.

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

The chart illustrates September temperature patterns in Caxias, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caxias, September typically has an average temperature of 20°C (68°F), with highs reaching up to 29°C (84°F) and lows dropping to around 14°C (58°F).

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

September Precipitation in Caxias

In Caxias in September, the precipitation amount is 27 mm (1.1 in) over the course of 2 days.

September Precipitation Trends in Caxias

The chart displays monthly precipitation patterns in Caxias, 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 Caxias, September typically receives around 27 mm (1.1 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 Caxias

In Caxias in September humidity is 67%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, as the air clings to your skin and invites you to enjoy the sights at a leisurely pace.

September Average Humidity in Caxias

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

In Caxias 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 Caxias.

Maximum UV Index Levels in Caxias for September

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

Data source: Caxias 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 Caxias Compares to Other Months

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

This table compares monthly weather conditions in Caxias, 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 (53°F)	37 mm (1.5 inches)	85%	moderate
February Weather	13°C (55°F)	53 mm (2.1 inches)	75%	moderate
March Weather	14°C (57°F)	66 mm (2.6 inches)	72%	high
April Weather	15°C (59°F)	73 mm (2.9 inches)	70%	very high
May Weather	17°C (63°F)	36 mm (1.4 inches)	70%	very high
June Weather	18°C (66°F)	11 mm (0.4 inches)	63%	extreme
July Weather	20°C (68°F)	5 mm (0.2 inches)	60%	very high
August Weather	20°C (69°F)	3 mm (0.1 inches)	60%	very high
September Weather	20°C (68°F)	27 mm (1.1 inches)	67%	very high
October Weather	18°C (65°F)	46 mm (1.8 inches)	74%	high
November Weather	15°C (59°F)	80 mm (3.2 inches)	83%	moderate
December Weather	13°C (56°F)	62 mm (2.4 inches)	85%	moderate