September Weather in Castilho, Brazil

Last updated: August 22, 2025

In September, the average temperature in Castilho, Brazil is a warm 27°C (81°F). While you might experience a minimum of 12°C (54°F) on cooler days, temperatures can soar to a sizzling 42°C (107°F). Expect a modest 21 mm (0.8 in) of precipitation over 2 days, complemented by an average humidity level of 33%, making for a comfortable yet vibrant atmosphere.

September Temperature in Castilho

In September in Castilho, the average temperature is 27°C (81°F), with maximums reaching up to 42°C (107°F) and minimums dropping as low as 12°C (54°F). It's advisable to pack accordingly to enjoy a range of activities in the warm climate while being prepared for cooler evenings.

September Weather in Castilho: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castilho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castilho, September typically has an average temperature of 27°C (81°F), with highs reaching up to 42°C (107°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Castilho

In Castilho in September, the precipitation amount is 21 mm (0.8 in) over a period of 2 days.

September Precipitation Trends in Castilho

The chart displays monthly precipitation patterns in Castilho, 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 Castilho, September typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 2 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 Castilho

In Castilho in September humidity is 33%. With an average temperature of 27°C (81°F), this humidity feels like a comfortable breeze on a warm day, making it quite pleasant for traveling and exploring the surroundings.

September Average Humidity in Castilho

This chart illustrates the average monthly humidity levels in Castilho, 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 Castilho is approximately 33%, 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 Castilho

In Castilho in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Castilho.

Maximum UV Index Levels in Castilho for September

The chart shows the monthly maximum UV Index (UVI) for Castilho 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 Castilho typically reaches 12, which falls under the extreme exposure category.

Data source: Castilho 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 Castilho Compares to Other Months

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

This table compares monthly weather conditions in Castilho, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	153 mm (6.0 inches)	84%	extreme
February Weather	27°C (81°F)	132 mm (5.2 inches)	85%	extreme
March Weather	27°C (81°F)	109 mm (4.3 inches)	84%	extreme
April Weather	25°C (78°F)	46 mm (1.8 inches)	76%	extreme
May Weather	23°C (73°F)	42 mm (1.7 inches)	60%	very high
June Weather	22°C (73°F)	15 mm (0.6 inches)	48%	high
July Weather	21°C (71°F)	4 mm (0.2 inches)	44%	very high
August Weather	23°C (74°F)	17 mm (0.7 inches)	38%	very high
September Weather	27°C (81°F)	21 mm (0.8 inches)	33%	extreme
October Weather	27°C (81°F)	94 mm (3.7 inches)	31%	extreme
November Weather	27°C (81°F)	115 mm (4.5 inches)	62%	extreme
December Weather	27°C (81°F)	155 mm (6.1 inches)	82%	extreme