March Weather in Castro, Brazil

Last updated: August 22, 2025

In Castro, Brazil, the average temperature in March hovers around 20°C (69°F), offering a pleasant climate for outdoor activities. Expect minimums of 12°C (53°F) and maximums reaching 30°C (86°F), providing a comfortable range for all. However, be prepared for some rain, with a total precipitation of 132 mm (5.2 in) over 21 days. The air tends to be quite humid, with an average humidity level of 80%, so dress accordingly!

March Temperature in Castro

In March in Castro, the average temperature is 20°C (69°F). Maximums can reach 30°C (86°F), and minimums can be as low as 12°C (53°F). This pleasant climate makes Castro an ideal destination for travelers looking to enjoy mild weather during their visit.

March Weather in Castro: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Castro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castro, March typically has an average temperature of 20°C (69°F), with highs reaching up to 30°C (86°F) and lows dropping to around 12°C (53°F).

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

March Precipitation in Castro

In Castro in March, the total precipitation amount is 132 mm (5.2 in) spread over 21 days.

March Precipitation Trends in Castro

The chart displays monthly precipitation patterns in Castro, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Castro, March typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 21 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Castro

In Castro in March, humidity is 80%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making every step slightly more challenging as you navigate the air that clings to your skin, often leaving you longing for a cool breeze while exploring the sights.

March Average Humidity in Castro

This chart illustrates the average monthly humidity levels in Castro, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Castro is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Castro

In Castro in March, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Castro.

Maximum UV Index Levels in Castro for March

The chart shows the monthly maximum UV Index (UVI) for Castro in March, 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 March, the maximum UV index in Castro typically reaches 13, which falls under the extreme exposure category.

Data source: Castro March 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 March Weather in Castro Compares to Other Months

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

This table compares monthly weather conditions in Castro, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	193 mm (7.6 inches)	85%	extreme
February Weather	21°C (70°F)	136 mm (5.3 inches)	80%	extreme
March Weather	20°C (69°F)	132 mm (5.2 inches)	80%	extreme
April Weather	18°C (65°F)	49 mm (1.9 inches)	77%	extreme
May Weather	16°C (61°F)	74 mm (2.9 inches)	76%	very high
June Weather	15°C (59°F)	102 mm (4.0 inches)	74%	high
July Weather	14°C (57°F)	28 mm (1.1 inches)	66%	high
August Weather	15°C (59°F)	74 mm (2.9 inches)	57%	very high
September Weather	18°C (65°F)	65 mm (2.6 inches)	58%	extreme
October Weather	19°C (66°F)	166 mm (6.5 inches)	60%	extreme
November Weather	19°C (67°F)	106 mm (4.2 inches)	78%	extreme
December Weather	21°C (69°F)	176 mm (6.9 inches)	86%	extreme