September Weather in Castelo do Piaui, Brazil

Last updated: August 22, 2025

In Castelo do Piaui, Brazil, the average temperature in September is a warm 31°C (88°F), with lows reaching 22°C (72°F) and highs soaring up to 38°C (101°F). Expect very little rain, with an average precipitation of just 1 mm (0.0 in) over 0 days. Enjoy the comfortable climate with an average humidity of 41%!

September Temperature in Castelo do Piaui

In September in Castelo do Piaui, the average temperature is 31°C (88°F). Maximums can reach 38°C (101°F), and minimums can be as low as 22°C (72°F). Be sure to prepare for warm weather and stay hydrated while exploring the attractions in Castelo do Piaui.

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

The chart illustrates September 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, September typically has an average temperature of 31°C (88°F), with highs reaching up to 38°C (101°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Castelo do Piaui

In Castelo do Piaui in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in Castelo do Piaui

The chart displays monthly precipitation patterns in Castelo do Piaui, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Castelo do Piaui, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Castelo do Piaui

In Castelo do Piaui in September humidity is 41%. With an average temperature of 31°C (88°F), this humidity feels like a warm embrace, making it comfortable for exploration and outdoor activities, as long as travelers stay hydrated and take breaks in the shade.

September Average Humidity in Castelo do Piaui

This chart illustrates the average monthly humidity levels in Castelo do Piaui, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Castelo do Piaui is approximately 41%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Castelo do Piaui

In Castelo do Piaui in September, 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 September

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

Data source: Castelo do Piaui September 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 September 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 September’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 September’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