August Weather in Castanhal, Brazil

Last updated: August 22, 2025

In August, the average temperature in Castanhal, Brazil hovers around 27°C (81°F), making it a warm destination. Expect a comfortable minimum of 21°C (70°F), while the mercury can rise to a sizzling 35°C (96°F). However, be prepared for some wet days, as 56 mm (2.2 in) of rainfall is typical over 13 days. With an average humidity of 72%, it's perfect for those who enjoy a tropical climate!

August Temperature in Castanhal

In August in Castanhal, the average temperature is 27°C (81°F). Maximums can reach 35°C (96°F), while minimums can drop to 21°C (70°F). It's a great time to visit for warm weather and outdoor activities!

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

The chart illustrates August 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, August typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (96°F) and lows dropping to around 21°C (70°F).

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

August Precipitation in Castanhal

In Castanhal in August, the precipitation amount is 56 mm (2.2 in) over the course of 13 days.

August Precipitation Trends in Castanhal

The chart displays monthly precipitation patterns in Castanhal, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Castanhal, August typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Castanhal

In Castanhal in August humidity is 72%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, damp blanket, making travel a bit uncomfortable as you navigate through the thick, sticky air.

August Average Humidity in Castanhal

This chart illustrates the average monthly humidity levels in Castanhal, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Castanhal is approximately 72%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Castanhal

In Castanhal in August, 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 August

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

Data source: Castanhal August 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 August 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 August’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 August’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