September Weather in Altos, Brazil

Last updated: August 22, 2025

In September, the average temperature in Altos, Brazil reaches a warm 31°C (87°F). Temperatures can fluctuate, with a minimum of 23°C (73°F) and a sweltering maximum of 39°C (103°F). With only a light 2 mm (0.1 in) of precipitation spread over 0 days, you can expect predominantly dry conditions, complemented by an average humidity of just 36%. Prepare for some sunny weather!

September Temperature in Altos

In September in Altos, the average temperature is 31°C (87°F). Maximums can reach 39°C (103°F), while minimums can drop to as low as 23°C (73°F). Be prepared for warm weather and stay hydrated while exploring!

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

The chart illustrates September temperature patterns in Altos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altos, September typically has an average temperature of 31°C (87°F), with highs reaching up to 39°C (103°F) and lows dropping to around 23°C (73°F).

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

September Precipitation in Altos

In Altos in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Altos

The chart displays monthly precipitation patterns in Altos, 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 Altos, September typically receives around 2 mm (0.1 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 Altos

In Altos in September humidity is 36%. With an average temperature of 31°C (87°F), this humidity feels like a warm embrace, making it quite comfortable for traveling, as you can enjoy the outdoors without feeling overly sticky or suffocated.

September Average Humidity in Altos

This chart illustrates the average monthly humidity levels in Altos, 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 Altos is approximately 36%, 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 Altos

In Altos 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 Altos.

Maximum UV Index Levels in Altos for September

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

Data source: Altos 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 Altos Compares to Other Months

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

This table compares monthly weather conditions in Altos, 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)	199 mm (7.8 inches)	90%	extreme
February Weather	27°C (80°F)	366 mm (14.4 inches)	91%	extreme
March Weather	26°C (80°F)	387 mm (15.2 inches)	92%	extreme
April Weather	27°C (80°F)	294 mm (11.6 inches)	93%	extreme
May Weather	27°C (81°F)	81 mm (3.2 inches)	88%	extreme
June Weather	28°C (83°F)	9 mm (0.3 inches)	75%	extreme
July Weather	28°C (83°F)	12 mm (0.5 inches)	52%	extreme
August Weather	29°C (85°F)	3 mm (0.1 inches)	42%	extreme
September Weather	31°C (87°F)	2 mm (0.1 inches)	36%	extreme
October Weather	31°C (88°F)	11 mm (0.4 inches)	35%	extreme
November Weather	30°C (86°F)	45 mm (1.8 inches)	43%	extreme
December Weather	29°C (84°F)	95 mm (3.7 inches)	76%	extreme