October Weather in Castanhal, Brazil

Last updated: August 22, 2025

In October, the average temperature in Castanhal, Brazil reaches a warm 28°C (83°F), with comfortable lows around 22°C (71°F) and highs peaking at 35°C (96°F). Expect mild precipitation, totaling 58 mm (2.3 in) over approximately 13 days, and a pleasant humidity average of 69%.

October Temperature in Castanhal

In October in Castanhal, the average temperature is 28°C (83°F). The maximum can reach 35°C (96°F), while the minimum can be as low as 22°C (71°F). This pleasant weather makes it an ideal destination for travelers seeking warmth and sunshine.

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

The chart illustrates October temperature patterns in Castanhal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castanhal, October typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (96°F) and lows dropping to around 22°C (71°F).

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

October Precipitation in Castanhal

In Castanhal in October, the total precipitation amount is 58 mm (2.3 in), occurring over the course of 13 days.

October Precipitation Trends in Castanhal

The chart displays monthly precipitation patterns in Castanhal, 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 Castanhal, October typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 13 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 Castanhal

In Castanhal in October, humidity is 69%. With an average temperature of 28°C (83°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor exploration a bit more strenuous and requiring plenty of hydration and breaks in the shade.

October Average Humidity in Castanhal

This chart illustrates the average monthly humidity levels in Castanhal, 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 Castanhal is approximately 69%, 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 Castanhal

In Castanhal in October, 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 Castanhal.

Maximum UV Index Levels in Castanhal for October

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

Data source: Castanhal 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 Castanhal Compares to Other Months

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

This table compares monthly weather conditions in Castanhal, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	265 mm (10.4 inches)	89%	extreme
February Weather	26°C (79°F)	525 mm (20.7 inches)	81%	extreme
March Weather	26°C (79°F)	535 mm (21.1 inches)	81%	extreme
April Weather	26°C (79°F)	445 mm (17.5 inches)	85%	extreme
May Weather	26°C (80°F)	350 mm (13.8 inches)	89%	extreme
June Weather	27°C (80°F)	132 mm (5.2 inches)	86%	extreme
July Weather	27°C (80°F)	86 mm (3.4 inches)	81%	extreme
August Weather	27°C (81°F)	56 mm (2.2 inches)	72%	extreme
September Weather	28°C (82°F)	53 mm (2.1 inches)	69%	extreme
October Weather	28°C (83°F)	58 mm (2.3 inches)	69%	extreme
November Weather	28°C (82°F)	98 mm (3.9 inches)	71%	extreme
December Weather	27°C (81°F)	202 mm (8.0 inches)	82%	extreme