May Weather in Castro, Brazil

Last updated: August 22, 2025

In May, the average temperature in Castro, Brazil is a comfortable 16°C (61°F), with a minimum of 3°C (37°F) and a maximum soaring to 27°C (82°F). During this month, expect 74 mm (2.9 in) of precipitation spread over 9 days, and enjoy a notable average humidity of 76%.

May Temperature in Castro

In May in Castro, the average temperature is 16°C (61°F). The maximum can reach 27°C (82°F), while the minimum can be as low as 3°C (37°F). It's a great time to visit for mild weather and enjoyable outdoor activities.

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

The chart illustrates May 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, May typically has an average temperature of 16°C (61°F), with highs reaching up to 27°C (82°F) and lows dropping to around 3°C (37°F).

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

May Precipitation in Castro

In Castro in May, the precipitation amount is 74 mm (2.9 in), which occurs over a span of 9 days.

May Precipitation Trends in Castro

The chart displays monthly precipitation patterns in Castro, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Castro, May typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Castro

In Castro in May humidity is 76%. With an average temperature of 16°C (61°F), this humidity feels like a warm embrace that makes traveling feel slightly heavy yet refreshing, often prompting you to seek shade or indulge in ice-cold drinks to stay comfortable.

May Average Humidity in Castro

This chart illustrates the average monthly humidity levels in Castro, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Castro is approximately 76%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Castro

In Castro in May, 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 Castro.

Maximum UV Index Levels in Castro for May

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

Data source: Castro May 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 May 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 May’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 May’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