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September Weather in Alta Floresta, Brazil

Last updated: August 22, 2025

In September, the average temperature in Alta Floresta, Brazil hovers around 28°C (83°F), offering a warm and inviting climate. Expect minimums dropping to 19°C (66°F) and maximums soaring up to 38°C (101°F), perfect for those who love the heat. During this month, precipitation is relatively low at 37 mm (1.4 in) spread over 7 days, with an average humidity of just 25%. Whether you're basking in the sun or exploring the surroundings, it's a great time to enjoy this vibrant destination!

September Temperature in Alta Floresta

In September in Alta Floresta, the average temperature is 28°C (83°F). Maximum temperatures can reach 38°C (101°F), while minimums can drop to as low as 19°C (66°F). This makes Alta Floresta an ideal destination for travelers seeking warm weather and plenty of sunshine.

September Weather in Alta Floresta: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Alta Floresta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alta Floresta, September typically has an average temperature of 28°C (83°F), with highs reaching up to 38°C (101°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec787778787979798282807877
Data source: Temperature data for Alta Floresta generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Alta Floresta

In Alta Floresta in September, the precipitation amount is measured at 37 mm (1.4 in) over a span of 7 days.

September Precipitation Trends in Alta Floresta

The chart displays monthly precipitation patterns in Alta Floresta, 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 Alta Floresta, September typically receives around 37 mm (1.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec2383173042013950337109277337
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alta Floresta

In Alta Floresta in September, humidity is 25%. With an average temperature of 28°C (83°F), this humidity feels like a comfortable embrace, making it quite pleasant for traveling, as you'll likely enjoy the warm weather without excessive stickiness or discomfort.

September Average Humidity in Alta Floresta

This chart illustrates the average monthly humidity levels in Alta Floresta, 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 Alta Floresta is approximately 25%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%89%89%78%57%43%33%25%24%56%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alta Floresta

In Alta Floresta 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 Alta Floresta.

Maximum UV Index Levels in Alta Floresta for September

The chart shows the monthly maximum UV Index (UVI) for Alta Floresta 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 Alta Floresta typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161616151210101112131515
Data source: Alta Floresta 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 Alta Floresta Compares to Other Months

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

This table compares monthly weather conditions in Alta Floresta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)238 mm (9.4 inches)89%extreme
February Weather25°C (77°F)317 mm (12.5 inches)88%extreme
March Weather25°C (78°F)304 mm (12.0 inches)89%extreme
April Weather26°C (78°F)201 mm (7.9 inches)89%extreme
May Weather26°C (79°F)39 mm (1.5 inches)78%extreme
June Weather26°C (79°F)4 mm (0.2 inches)57%very high
July Weather26°C (79°F)0 mm (0.0 inches)43%very high
August Weather28°C (82°F)3 mm (0.1 inches)33%extreme
September Weather28°C (83°F)37 mm (1.4 inches)25%extreme
October Weather27°C (81°F)109 mm (4.3 inches)24%extreme
November Weather26°C (79°F)277 mm (10.9 inches)55%extreme
December Weather25°C (78°F)337 mm (13.3 inches)82%extreme

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