September Weather in Castellar de Santiago, Spain

Last updated: August 27, 2025

In September, the average temperature in Castellar de Santiago, Spain is a pleasant 23°C (73°F), with temperature fluctuations ranging from a minimum of 9°C (49°F) to a maximum of 37°C (99°F). You can expect an average precipitation of 28 mm (1.1 in) spread over 5 days, and the humidity levels typically hover around 53%. Ideal for those who enjoy mild weather with a hint of moisture in the air!

September Temperature in Castellar de Santiago

In September in Castellar de Santiago, the average temperature is 23°C (73°F). The maximum can reach 37°C (99°F) and the minimum can be as low as 9°C (49°F). This makes it a great destination for travelers who enjoy warm weather but should also be prepared for cooler evenings.

September Weather in Castellar de Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castellar de Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castellar de Santiago, September typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Castellar de Santiago

In Castellar de Santiago in September, the precipitation amount is 28 mm (1.1 in) over a period of 5 days.

September Precipitation Trends in Castellar de Santiago

The chart displays monthly precipitation patterns in Castellar de Santiago, 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 Castellar de Santiago, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 5 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 Castellar de Santiago

In Castellar de Santiago in September, humidity is 53%. With an average temperature of 23°C (73°F), this humidity feels like a comfortable embrace, making it ideal for leisurely strolls or exploring the sights without feeling overwhelmed.

September Average Humidity in Castellar de Santiago

This chart illustrates the average monthly humidity levels in Castellar de Santiago, 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 Castellar de Santiago is approximately 53%, 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 Castellar de Santiago

In Castellar de Santiago 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 Castellar de Santiago.

Maximum UV Index Levels in Castellar de Santiago for September

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

Data source: Castellar de Santiago 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 Castellar de Santiago Compares to Other Months

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

This table compares monthly weather conditions in Castellar de Santiago, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	34 mm (1.3 inches)	85%	moderate
February Weather	9°C (49°F)	35 mm (1.4 inches)	78%	moderate
March Weather	11°C (52°F)	76 mm (3.0 inches)	66%	high
April Weather	13°C (56°F)	92 mm (3.6 inches)	60%	very high
May Weather	19°C (66°F)	36 mm (1.4 inches)	56%	very high
June Weather	24°C (75°F)	16 mm (0.6 inches)	44%	extreme
July Weather	28°C (82°F)	8 mm (0.3 inches)	44%	extreme
August Weather	28°C (83°F)	16 mm (0.6 inches)	42%	very high
September Weather	23°C (73°F)	28 mm (1.1 inches)	53%	very high
October Weather	17°C (63°F)	41 mm (1.6 inches)	70%	high
November Weather	10°C (51°F)	70 mm (2.7 inches)	83%	moderate
December Weather	8°C (46°F)	56 mm (2.2 inches)	86%	moderate