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September Weather in Cachoeiras de Macacu, Brazil

Last updated: August 22, 2025

In September, the average temperature in Cachoeiras de Macacu, Brazil hovers around 21°C (70°F). You can expect a minimum of 10°C (50°F) and a maximum that can reach up to 34°C (93°F). During this month, precipitation amounts to approximately 83 mm (3.3 in) spread over 11 days, contributing to an average humidity level of 68%.

September Temperature in Cachoeiras de Macacu

In September in Cachoeiras de Macacu, the average temperature is 21°C (70°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 10°C (50°F). This makes Cachoeiras de Macacu a great destination for travelers seeking comfortable weather and a variety of outdoor activities.

September Weather in Cachoeiras de Macacu: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Cachoeiras de Macacu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cachoeiras de Macacu, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec767474706766646469717073
Data source: Temperature data for Cachoeiras de Macacu 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 Cachoeiras de Macacu

In Cachoeiras de Macacu in September, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

September Precipitation Trends in Cachoeiras de Macacu

The chart displays monthly precipitation patterns in Cachoeiras de Macacu, 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 Cachoeiras de Macacu, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec2553342471247650347383165290345
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cachoeiras de Macacu

In Cachoeiras de Macacu in September humidity is 68%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making the air feel slightly heavy and sticky, which can be quite exhausting for travelers.

September Average Humidity in Cachoeiras de Macacu

This chart illustrates the average monthly humidity levels in Cachoeiras de Macacu, 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 Cachoeiras de Macacu is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%83%81%80%76%73%68%61%72%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cachoeiras de Macacu

In Cachoeiras de Macacu 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 Cachoeiras de Macacu.

Maximum UV Index Levels in Cachoeiras de Macacu for September

The chart shows the monthly maximum UV Index (UVI) for Cachoeiras de Macacu 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 Cachoeiras de Macacu typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16151411867912131416
Data source: Cachoeiras de Macacu 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 Cachoeiras de Macacu Compares to Other Months

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

This table compares monthly weather conditions in Cachoeiras de Macacu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)255 mm (10.1 inches)85%extreme
February Weather24°C (75°F)334 mm (13.2 inches)85%extreme
March Weather23°C (74°F)247 mm (9.7 inches)86%extreme
April Weather21°C (71°F)124 mm (4.9 inches)83%extreme
May Weather19°C (67°F)76 mm (3.0 inches)81%very high
June Weather19°C (66°F)50 mm (2.0 inches)80%high
July Weather18°C (64°F)34 mm (1.3 inches)76%high
August Weather18°C (65°F)73 mm (2.9 inches)73%very high
September Weather21°C (70°F)83 mm (3.3 inches)68%extreme
October Weather22°C (71°F)164 mm (6.5 inches)61%extreme
November Weather21°C (71°F)290 mm (11.4 inches)72%extreme
December Weather23°C (74°F)345 mm (13.6 inches)75%extreme

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