October Weather in Castelo do Piaui, Brazil

Last updated: August 22, 2025

In Castelo do Piaui, Brazil during October, the weather is typically warm, with an average temperature of 31°C (89°F). Expect temperatures to range from a comfortable 23°C (74°F) to a sizzling 40°C (104°F). Rain is scarce, with only about 7 mm (0.3 in) of precipitation falling over 2 days. The atmosphere is relatively dry, boasting an average humidity of just 38%.

October Temperature in Castelo do Piaui

In October in Castelo do Piaui, the average temperature is 31°C (89°F). Maximums can reach 40°C (104°F) and minimums can be as low as 23°C (74°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

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

The chart illustrates October temperature patterns in Castelo do Piaui, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelo do Piaui, October typically has an average temperature of 31°C (89°F), with highs reaching up to 40°C (104°F) and lows dropping to around 23°C (74°F).

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

October Precipitation in Castelo do Piaui

In Castelo do Piaui in October, the precipitation amount is 7 mm (0.3 in) over a period of 2 days.

October Precipitation Trends in Castelo do Piaui

The chart displays monthly precipitation patterns in Castelo do Piaui, 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 do Piaui, October typically receives around 7 mm (0.3 inches) of precipitation spread over approximately 2 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 do Piaui

In Castelo do Piaui in October, humidity is 38%. With an average temperature of 31°C (89°F), this humidity feels like a warm, pleasant embrace, making it quite comfortable for traveling, as it allows for enjoyable outdoor activities without feeling overly muggy.

October Average Humidity in Castelo do Piaui

This chart illustrates the average monthly humidity levels in Castelo do Piaui, 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 do Piaui is approximately 38%, 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 do Piaui

In Castelo do Piaui 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 Castelo do Piaui.

Maximum UV Index Levels in Castelo do Piaui for October

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

Data source: Castelo do Piaui 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 do Piaui Compares to Other Months

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

This table compares monthly weather conditions in Castelo do Piaui, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (83°F)	116 mm (4.6 inches)	90%	extreme
February Weather	27°C (81°F)	263 mm (10.4 inches)	91%	extreme
March Weather	27°C (80°F)	298 mm (11.7 inches)	93%	extreme
April Weather	27°C (80°F)	177 mm (7.0 inches)	93%	extreme
May Weather	27°C (82°F)	42 mm (1.7 inches)	88%	extreme
June Weather	28°C (83°F)	3 mm (0.1 inches)	75%	extreme
July Weather	28°C (83°F)	7 mm (0.3 inches)	55%	extreme
August Weather	30°C (86°F)	1 mm (0.0 inches)	46%	extreme
September Weather	31°C (88°F)	1 mm (0.0 inches)	41%	extreme
October Weather	31°C (89°F)	7 mm (0.3 inches)	38%	extreme
November Weather	31°C (88°F)	20 mm (0.8 inches)	43%	extreme
December Weather	30°C (86°F)	38 mm (1.5 inches)	67%	extreme