September Weather in Castillos, Uruguay

Last updated: August 28, 2025

In September, the average temperature in Castillos, Uruguay hovers around 14°C (58°F). Expect minimums reaching 5°C (42°F) and maximums soaring to 27°C (82°F). This month also brings 95 mm (3.7 in) of rainfall over about 9 days, contributing to an average humidity level of 81%. Stay prepared for a mix of mild weather and moisture!

September Temperature in Castillos

In September in Castillos, the average temperature is 14°C (58°F). The maximum can reach 27°C (82°F), and the minimum can be as low as 5°C (42°F). This moderate climate makes Castillos an ideal destination for travelers seeking comfortable weather and a pleasant atmosphere.

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

The chart illustrates September temperature patterns in Castillos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castillos, September typically has an average temperature of 14°C (58°F), with highs reaching up to 27°C (82°F) and lows dropping to around 5°C (42°F).

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

September Precipitation in Castillos

In Castillos in September, the precipitation amount is 95 mm (3.7 in) over the course of 9 days.

September Precipitation Trends in Castillos

The chart displays monthly precipitation patterns in Castillos, 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 Castillos, September typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 9 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 Castillos

In Castillos in September, humidity is 81%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor adventures sticky and challenging, while also providing a lush, vibrant atmosphere perfect for exploring.

September Average Humidity in Castillos

This chart illustrates the average monthly humidity levels in Castillos, 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 Castillos is approximately 81%, 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 Castillos

In Castillos 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 Castillos.

Maximum UV Index Levels in Castillos for September

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

Data source: Castillos 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 Castillos Compares to Other Months

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

This table compares monthly weather conditions in Castillos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (73°F)	86 mm (3.4 inches)	75%	extreme
February Weather	22°C (72°F)	97 mm (3.8 inches)	79%	extreme
March Weather	21°C (70°F)	77 mm (3.0 inches)	79%	extreme
April Weather	19°C (67°F)	91 mm (3.6 inches)	79%	high
May Weather	16°C (61°F)	70 mm (2.8 inches)	80%	moderate
June Weather	13°C (56°F)	143 mm (5.6 inches)	80%	moderate
July Weather	12°C (54°F)	100 mm (3.9 inches)	76%	moderate
August Weather	12°C (54°F)	106 mm (4.2 inches)	78%	high
September Weather	14°C (58°F)	95 mm (3.7 inches)	81%	very high
October Weather	16°C (61°F)	117 mm (4.6 inches)	79%	extreme
November Weather	19°C (66°F)	60 mm (2.4 inches)	78%	extreme
December Weather	20°C (69°F)	46 mm (1.8 inches)	76%	extreme