October Weather in Castelo, Brazil

Last updated: August 22, 2025

The average temperature in Castelo, Brazil during October is a pleasant 22°C (72°F). However, don't be surprised by the temperature fluctuations; it can dip to a low of 13°C (55°F) while peaking at a warm 35°C (96°F). Expect a precipitation amount of 114 mm (4.5 in) spread over 15 days, and enjoy the average humidity of 66% that adds to the overall atmosphere of the season.

October Temperature in Castelo

In October in Castelo, the average temperature is 22°C (72°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 13°C (55°F). This makes it an ideal time for travelers to enjoy warm days while being prepared for cooler evenings.

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

The chart illustrates October temperature patterns in Castelo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelo, October typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (96°F) and lows dropping to around 13°C (55°F).

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

October Precipitation in Castelo

In Castelo in October, the precipitation amount is 114 mm (4.5 in) spread over a duration of 15 days.

October Precipitation Trends in Castelo

The chart displays monthly precipitation patterns in Castelo, 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 Castelo, October typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 15 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 Castelo

In Castelo in October, humidity is 66%. With an average temperature of 22°C (72°F), this humidity feels like walking through a warm, enveloping blanket, making it essential to stay hydrated while exploring the sights and taking regular breaks in shaded areas.

October Average Humidity in Castelo

This chart illustrates the average monthly humidity levels in Castelo, 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 Castelo is approximately 66%, 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 Castelo

In Castelo 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 Castelo, you can check here.

Maximum UV Index Levels in Castelo for October

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

Data source: Castelo 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 Castelo Compares to Other Months

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

This table compares monthly weather conditions in Castelo, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	86 mm (3.4 inches)	80%	extreme
February Weather	24°C (75°F)	176 mm (6.9 inches)	85%	extreme
March Weather	23°C (74°F)	131 mm (5.1 inches)	86%	extreme
April Weather	22°C (71°F)	76 mm (3.0 inches)	85%	extreme
May Weather	20°C (68°F)	46 mm (1.8 inches)	82%	very high
June Weather	19°C (67°F)	24 mm (1.0 inches)	81%	high
July Weather	18°C (64°F)	18 mm (0.7 inches)	79%	very high
August Weather	18°C (65°F)	33 mm (1.3 inches)	75%	very high
September Weather	21°C (70°F)	50 mm (2.0 inches)	72%	extreme
October Weather	22°C (72°F)	114 mm (4.5 inches)	66%	extreme
November Weather	22°C (71°F)	167 mm (6.6 inches)	69%	extreme
December Weather	23°C (74°F)	175 mm (6.9 inches)	72%	extreme