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September Weather in Casa Branca, Brazil

Last updated: August 22, 2025

In September, the average temperature in Casa Branca, Brazil is a pleasant 24°C (76°F). Expect a minimum chill of 9°C (49°F) and occasional peaks at a sizzling 37°C (99°F). With an average precipitation of 29 mm (1.1 in) over just 4 days, you’ll experience a relatively dry month paired with a comfortable average humidity of 49%. Enjoy the mild climate while exploring!

September Temperature in Casa Branca

In September in Casa Branca, the average temperature is 24°C (76°F). Maximums can reach 37°C (99°F), while minimums can be as low as 9°C (49°F). This diverse temperature range makes Casa Branca an ideal destination for travelers seeking both warmth and cooler respite.

September Weather in Casa Branca: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Casa Branca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casa Branca, September typically has an average temperature of 24°C (76°F), with highs reaching up to 37°C (99°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec767576736867656875767576
Data source: Temperature data for Casa Branca 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 Casa Branca

In Casa Branca in September, the precipitation amount is 29 mm (1.1 in) over a span of 4 days.

September Precipitation Trends in Casa Branca

The chart displays monthly precipitation patterns in Casa Branca, 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 Casa Branca, September typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec1671401145634159222999139150
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Casa Branca

In Casa Branca in September, humidity is 49%. With an average temperature of 24°C (76°F), this humidity feels like a comfortable embrace, making it pleasant for traveling as the warm air envelops you without feeling too oppressive.

September Average Humidity in Casa Branca

This chart illustrates the average monthly humidity levels in Casa Branca, 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 Casa Branca is approximately 49%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%87%87%80%74%72%67%58%49%36%65%72%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Casa Branca

In Casa Branca 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 Casa Branca.

Maximum UV Index Levels in Casa Branca for September

The chart shows the monthly maximum UV Index (UVI) for Casa Branca 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 Casa Branca typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161613118781012131416
Data source: Casa Branca 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 Casa Branca Compares to Other Months

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

This table compares monthly weather conditions in Casa Branca, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)167 mm (6.6 inches)85%extreme
February Weather24°C (76°F)140 mm (5.5 inches)87%extreme
March Weather24°C (76°F)114 mm (4.5 inches)87%extreme
April Weather23°C (73°F)56 mm (2.2 inches)80%extreme
May Weather20°C (68°F)34 mm (1.3 inches)74%very high
June Weather19°C (67°F)15 mm (0.6 inches)72%high
July Weather18°C (65°F)9 mm (0.4 inches)67%very high
August Weather20°C (69°F)22 mm (0.9 inches)58%very high
September Weather24°C (76°F)29 mm (1.1 inches)49%extreme
October Weather24°C (76°F)99 mm (3.9 inches)36%extreme
November Weather24°C (75°F)139 mm (5.5 inches)65%extreme
December Weather24°C (76°F)150 mm (5.9 inches)72%extreme

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