September Weather in Castro Barros, Argentina

Last updated: August 22, 2025

In Castro Barros, Argentina, the average temperature in September hovers around 20°C (68°F). Here, you can expect a minimum chill of 4°C (40°F) and the occasional warmth reaching up to 39°C (103°F). Rainfall is modest, with about 25 mm (1.0 in) of precipitation spread over 3 days, while average humidity remains at a comfortable 45%. Enjoy the delightful climate!

September Temperature in Castro Barros

In September in Castro Barros, the average temperature is 20°C (68°F). Maximum temperatures can reach as high as 39°C (103°F), while the minimum can drop to a cool 4°C (40°F). Be prepared for a diverse range of temperatures, making it essential to pack versatile clothing for your travels.

September Weather in Castro Barros: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castro Barros, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castro Barros, September typically has an average temperature of 20°C (68°F), with highs reaching up to 39°C (103°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Castro Barros

In Castro Barros in September, the precipitation amount is 25 mm (1.0 in) over the course of 3 days.

September Precipitation Trends in Castro Barros

The chart displays monthly precipitation patterns in Castro Barros, 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 Castro Barros, September typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 3 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 Castro Barros

In Castro Barros in September humidity is 45%. With an average temperature of 20°C (68°F), this humidity feels like a refreshing embrace, making it comfortable for traveling and exploring the sights without feeling overly sticky or weighed down.

September Average Humidity in Castro Barros

This chart illustrates the average monthly humidity levels in Castro Barros, 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 Castro Barros is approximately 45%, 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 Castro Barros

In Castro Barros 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 Castro Barros.

Maximum UV Index Levels in Castro Barros for September

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

Data source: Castro Barros 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 Castro Barros Compares to Other Months

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

This table compares monthly weather conditions in Castro Barros, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	29°C (84°F)	83 mm (3.3 inches)	49%	extreme
February Weather	27°C (81°F)	61 mm (2.4 inches)	54%	extreme
March Weather	25°C (77°F)	71 mm (2.8 inches)	57%	extreme
April Weather	22°C (71°F)	69 mm (2.7 inches)	73%	very high
May Weather	17°C (62°F)	31 mm (1.2 inches)	75%	high
June Weather	13°C (56°F)	7 mm (0.3 inches)	67%	moderate
July Weather	13°C (55°F)	6 mm (0.2 inches)	54%	moderate
August Weather	16°C (61°F)	1 mm (0.0 inches)	43%	high
September Weather	20°C (68°F)	25 mm (1.0 inches)	45%	very high
October Weather	23°C (75°F)	22 mm (0.9 inches)	41%	extreme
November Weather	26°C (79°F)	66 mm (2.6 inches)	51%	extreme
December Weather	28°C (83°F)	66 mm (2.6 inches)	49%	extreme