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September Weather in Alegre, Brazil

Last updated: August 22, 2025

In September, the average temperature in Alegre, Brazil hovers around 21°C (71°F). Expect a comfortable range, with minimums dipping to 10°C (50°F) and maximums rising to 35°C (96°F). Be prepared for 60 mm (2.3 in) of precipitation spread over 7 days, and a relatively high average humidity of 72%.

September Temperature in Alegre

In September in Alegre, the average temperature is 21°C (71°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 10°C (50°F). This makes Alegre a great destination for travelers seeking warm days and cooler nights, perfect for outdoor activities and exploring the local culture.

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

The chart illustrates September temperature patterns in Alegre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alegre, September typically has an average temperature of 21°C (71°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec777575716867646570727174
Data source: Temperature data for Alegre 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 Alegre

In Alegre in September, the total precipitation amount is 60 mm (2.3 in) spread over a duration of 7 days.

September Precipitation Trends in Alegre

The chart displays monthly precipitation patterns in Alegre, 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 Alegre, September typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec1082291771025831193860136197230
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alegre

In Alegre in September, humidity is 72%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, creating a thick, sultry atmosphere that can be quite heavy for traveling.

September Average Humidity in Alegre

This chart illustrates the average monthly humidity levels in Alegre, 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 Alegre is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%85%86%85%82%81%79%75%72%67%69%72%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alegre

In Alegre 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 Alegre.

Maximum UV Index Levels in Alegre for September

The chart shows the monthly maximum UV Index (UVI) for Alegre 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 Alegre typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161514129781012141515
Data source: Alegre 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 Alegre Compares to Other Months

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

This table compares monthly weather conditions in Alegre, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)108 mm (4.3 inches)80%extreme
February Weather24°C (75°F)229 mm (9.0 inches)85%extreme
March Weather24°C (75°F)177 mm (7.0 inches)86%extreme
April Weather22°C (72°F)102 mm (4.0 inches)85%extreme
May Weather20°C (68°F)58 mm (2.3 inches)82%very high
June Weather19°C (67°F)31 mm (1.2 inches)81%high
July Weather18°C (65°F)19 mm (0.8 inches)79%very high
August Weather18°C (66°F)38 mm (1.5 inches)75%very high
September Weather21°C (71°F)60 mm (2.3 inches)72%extreme
October Weather22°C (72°F)136 mm (5.4 inches)66%extreme
November Weather22°C (71°F)197 mm (7.8 inches)69%extreme
December Weather23°C (74°F)230 mm (9.0 inches)72%extreme

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