April Weather in Castro, Brazil

Last updated: August 22, 2025

In April, the average temperature in Castro, Brazil hovers around 18°C (65°F), offering a pleasant climate. Expect temperatures to range from a cool 5°C (41°F) to a warm 28°C (83°F). Be prepared for some rain, as precipitation averages 49 mm (1.9 in) over 7 days, and humidity tends to be around 77%, adding a touch of moisture to the air.

April Temperature in Castro

In April in Castro, the average temperature is 18°C (65°F). The maximum can reach 28°C (83°F), and the minimum can be as low as 5°C (41°F). It's a great time to explore Castro while enjoying mild weather and comfortable temperatures.

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

The chart illustrates April 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, April typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (83°F) and lows dropping to around 5°C (41°F).

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

April Precipitation in Castro

In Castro in April, the precipitation amount is 49 mm (1.9 in) over the course of 7 days.

April Precipitation Trends in Castro

The chart displays monthly precipitation patterns in Castro, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Castro, April typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 7 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Castro

In Castro in April humidity is 77%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace that's both refreshing and slightly stifling, making it essential for travelers to stay hydrated and take frequent breaks to enjoy the vibrant surroundings without feeling overly fatigued.

April Average Humidity in Castro

This chart illustrates the average monthly humidity levels in Castro, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Castro is approximately 77%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Castro

In Castro in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Castro.

Maximum UV Index Levels in Castro for April

The chart shows the monthly maximum UV Index (UVI) for Castro in April, 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 April, the maximum UV index in Castro typically reaches 11, which falls under the extreme exposure category.

Data source: Castro April 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 April 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 April’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 April’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