October Weather in Castro, Brazil

Last updated: August 22, 2025

In October, the average temperature in Castro, Brazil hovers around 19°C (66°F). You'll experience a wide range with minimum temperatures dipping to 8°C (47°F) and highs soaring up to 34°C (93°F). Be prepared for 166 mm (6.5 in) of precipitation spread across 17 days, while enjoying an average humidity of 60%.

October Temperature in Castro

In October in Castro, the average temperature is 19°C (66°F). Maximum temperatures can reach 34°C (93°F), while minimums can dip as low as 8°C (47°F). This pleasant climate makes Castro an ideal destination for travelers looking to enjoy a mix of warm and cool weather.

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

The chart illustrates October 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, October typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (47°F).

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

October Precipitation in Castro

In Castro in October, the precipitation amount is 166 mm (6.5 in) over a span of 17 days.

October Precipitation Trends in Castro

The chart displays monthly precipitation patterns in Castro, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Castro, October typically receives around 166 mm (6.5 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Castro

In Castro in October, humidity is 60%. With an average temperature of 19°C (66°F), this humidity feels like a warm, slightly sticky embrace, making traveling enjoyable yet necessitating occasional breaks to stay refreshed.

October Average Humidity in Castro

This chart illustrates the average monthly humidity levels in Castro, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Castro is approximately 60%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Castro

In Castro in October, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Castro, you can check here.

Maximum UV Index Levels in Castro for October

The chart shows the monthly maximum UV Index (UVI) for Castro in October, 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 October, the maximum UV index in Castro typically reaches 14, which falls under the extreme exposure category.

Data source: Castro October 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 October 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 October’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 October’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