September Weather in Altamira, Brazil

Last updated: August 22, 2025

In Altamira, Brazil, the average temperature in September reaches a warm 28°C (83°F). Expect minimums around 22°C (72°F) and maximums soaring up to 36°C (97°F). During this month, precipitation totals 34 mm (1.3 in) over about 6 days, while the average humidity sits comfortably at 47%.

September Temperature in Altamira

In September in Altamira, the average temperature is 28°C (83°F). Maximum temperatures can reach 36°C (97°F), while the minimum can drop to as low as 22°C (72°F). It's a great time to visit for those who enjoy warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Altamira, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altamira, September typically has an average temperature of 28°C (83°F), with highs reaching up to 36°C (97°F) and lows dropping to around 22°C (72°F).

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

September Precipitation in Altamira

In Altamira in September, the total precipitation amount is 34 mm (1.3 in) spread over 6 days.

September Precipitation Trends in Altamira

The chart displays monthly precipitation patterns in Altamira, 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 Altamira, September typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 6 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 Altamira

In Altamira in September humidity is 47%. With an average temperature of 28°C (83°F), this humidity feels like a warm, comfortable embrace, making it ideal for exploring the sights while staying refreshed in the pleasant climate.

September Average Humidity in Altamira

This chart illustrates the average monthly humidity levels in Altamira, 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 Altamira is approximately 47%, 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 Altamira

In Altamira 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 Altamira.

Maximum UV Index Levels in Altamira for September

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

Data source: Altamira 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 Altamira Compares to Other Months

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

This table compares monthly weather conditions in Altamira, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	223 mm (8.8 inches)	85%	extreme
February Weather	26°C (79°F)	271 mm (10.7 inches)	69%	extreme
March Weather	26°C (79°F)	281 mm (11.1 inches)	70%	extreme
April Weather	26°C (79°F)	293 mm (11.5 inches)	85%	extreme
May Weather	26°C (80°F)	175 mm (6.9 inches)	90%	extreme
June Weather	27°C (80°F)	62 mm (2.5 inches)	82%	extreme
July Weather	27°C (81°F)	34 mm (1.3 inches)	66%	extreme
August Weather	28°C (83°F)	36 mm (1.4 inches)	51%	extreme
September Weather	28°C (83°F)	34 mm (1.3 inches)	47%	extreme
October Weather	28°C (84°F)	41 mm (1.6 inches)	46%	extreme
November Weather	28°C (82°F)	134 mm (5.3 inches)	46%	extreme
December Weather	27°C (80°F)	202 mm (8.0 inches)	70%	extreme