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September Weather in Guapimirim, Brazil

Last updated: August 22, 2025

In September, the average temperature in Guapimirim, Brazil is a pleasant 21°C (70°F), with fluctuations ranging from a cool 11°C (52°F) to a warm 34°C (93°F). Expect around 77 mm (3.0 in) of precipitation over 10 days, contributing to the region's average humidity of 68%. Ideal for enjoying the climate, be prepared for both sunny days and refreshing showers!

September Temperature in Guapimirim

In September in Guapimirim, the average temperature is 21°C (70°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as 11°C (52°F). This makes Guapimirim an ideal destination for travelers looking to enjoy warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Guapimirim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guapimirim, 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 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec777575716867646570727174
Data source: Temperature data for Guapimirim 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 Guapimirim

In Guapimirim in September, the total precipitation amount is 77 mm (3.0 in) spread over a duration of 10 days.

September Precipitation Trends in Guapimirim

The chart displays monthly precipitation patterns in Guapimirim, 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 Guapimirim, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec2253112261067150377377156261309
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Guapimirim

In Guapimirim 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 Guapimirim

This chart illustrates the average monthly humidity levels in Guapimirim, 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 Guapimirim 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 Guapimirim

In Guapimirim 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 Guapimirim.

Maximum UV Index Levels in Guapimirim for September

The chart shows the monthly maximum UV Index (UVI) for Guapimirim 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 Guapimirim typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16151311867912131415
Data source: Guapimirim 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 Guapimirim Compares to Other Months

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

This table compares monthly weather conditions in Guapimirim, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)225 mm (8.9 inches)85%extreme
February Weather24°C (75°F)311 mm (12.2 inches)85%extreme
March Weather24°C (75°F)226 mm (8.9 inches)86%extreme
April Weather22°C (71°F)106 mm (4.2 inches)83%extreme
May Weather20°C (68°F)71 mm (2.8 inches)81%very high
June Weather19°C (67°F)50 mm (2.0 inches)80%high
July Weather18°C (65°F)37 mm (1.4 inches)76%high
August Weather18°C (65°F)73 mm (2.9 inches)73%very high
September Weather21°C (70°F)77 mm (3.0 inches)68%extreme
October Weather22°C (72°F)156 mm (6.1 inches)61%extreme
November Weather22°C (71°F)261 mm (10.3 inches)72%extreme
December Weather23°C (74°F)309 mm (12.2 inches)75%extreme

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