September Weather in Santiago do Cacem, Portugal

Last updated: August 27, 2025

In September, the average temperature in Santiago do Cacem, Portugal is a pleasant 21°C (70°F), making it an ideal time for outdoor activities. Expect a minimum of 12°C (54°F) and a maximum reach of 33°C (92°F). The weather is relatively dry, with only 13 mm (0.5 in) of precipitation spread over 2 days. Enjoy the comfortable climate with an average humidity of 71%, perfect for exploring!

September Temperature in Santiago do Cacem

In September in Santiago do Cacem, the average temperature is 21°C (70°F). The maximum can reach 33°C (92°F), and the minimum can be as low as 12°C (54°F). This makes it an ideal time for travelers looking to enjoy pleasant weather while exploring the region.

September Weather in Santiago do Cacem: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santiago do Cacem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago do Cacem, September typically has an average temperature of 21°C (70°F), with highs reaching up to 33°C (92°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Santiago do Cacem

In Santiago do Cacem in September, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.

September Precipitation Trends in Santiago do Cacem

The chart displays monthly precipitation patterns in Santiago do Cacem, 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 Santiago do Cacem, September typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 2 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 Santiago do Cacem

In Santiago do Cacem in September, humidity is 71%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace, making outdoor activities feel slightly heavy and requiring regular breaks to stay refreshed while exploring.

September Average Humidity in Santiago do Cacem

This chart illustrates the average monthly humidity levels in Santiago do Cacem, 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 Santiago do Cacem 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 Santiago do Cacem

In Santiago do Cacem 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 Santiago do Cacem.

Maximum UV Index Levels in Santiago do Cacem for September

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

Data source: Santiago do Cacem 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 Santiago do Cacem Compares to Other Months

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

This table compares monthly weather conditions in Santiago do Cacem, 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)	31 mm (1.2 inches)	80%	moderate
February Weather	13°C (55°F)	55 mm (2.2 inches)	73%	moderate
March Weather	14°C (57°F)	82 mm (3.2 inches)	71%	high
April Weather	15°C (59°F)	70 mm (2.7 inches)	69%	very high
May Weather	18°C (65°F)	27 mm (1.1 inches)	69%	very high
June Weather	19°C (67°F)	9 mm (0.4 inches)	67%	extreme
July Weather	21°C (70°F)	3 mm (0.1 inches)	69%	very high
August Weather	21°C (71°F)	2 mm (0.1 inches)	68%	very high
September Weather	21°C (70°F)	13 mm (0.5 inches)	71%	very high
October Weather	18°C (65°F)	45 mm (1.8 inches)	75%	high
November Weather	15°C (59°F)	62 mm (2.4 inches)	78%	moderate
December Weather	13°C (55°F)	52 mm (2.0 inches)	81%	moderate