September Weather in Serro, Brazil

Last updated: August 22, 2025

In September, the average temperature in Serro, Brazil is a comfortable 20°C (68°F), with daily highs reaching up to 33°C (92°F) and lows dipping to 9°C (49°F). Expect about 32 mm (1.2 in) of rainfall spread over 4 days, contributing to an average humidity of 61%. It's a month that perfectly balances warmth with a refreshing breeze!

September Temperature in Serro

In September in Serro, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop to as low as 9°C (49°F). It's advisable to pack layers to comfortably enjoy your travels during this time.

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

The chart illustrates September temperature patterns in Serro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Serro, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Serro

In Serro in September, the total precipitation amount is 32 mm (1.2 in) over a span of 4 days.

September Precipitation Trends in Serro

The chart displays monthly precipitation patterns in Serro, 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 Serro, September typically receives around 32 mm (1.2 inches) of precipitation spread over approximately 4 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 Serro

In Serro in September humidity is 61%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making travel quite comfortable yet slightly sticky, as the air carries a gentle moisture that adds vibrancy to the surroundings.

September Average Humidity in Serro

This chart illustrates the average monthly humidity levels in Serro, 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 Serro is approximately 61%, 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 Serro

In Serro 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 Serro.

Maximum UV Index Levels in Serro for September

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

Data source: Serro 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 Serro Compares to Other Months

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

This table compares monthly weather conditions in Serro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	22°C (72°F)	130 mm (5.1 inches)	80%	extreme
February Weather	21°C (71°F)	268 mm (10.5 inches)	84%	extreme
March Weather	21°C (70°F)	161 mm (6.3 inches)	86%	extreme
April Weather	20°C (68°F)	80 mm (3.2 inches)	83%	extreme
May Weather	18°C (65°F)	47 mm (1.8 inches)	78%	very high
June Weather	17°C (63°F)	12 mm (0.5 inches)	77%	very high
July Weather	16°C (62°F)	8 mm (0.3 inches)	74%	very high
August Weather	17°C (63°F)	18 mm (0.7 inches)	69%	extreme
September Weather	20°C (68°F)	32 mm (1.2 inches)	61%	extreme
October Weather	21°C (71°F)	139 mm (5.5 inches)	47%	extreme
November Weather	21°C (70°F)	207 mm (8.2 inches)	54%	extreme
December Weather	21°C (71°F)	274 mm (10.8 inches)	60%	extreme