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September Weather in Joinville, Brazil

Last updated: August 22, 2025

In September, the average temperature in Joinville, Brazil is a pleasant 20°C (68°F). However, be prepared for fluctuations, as temperatures can dip as low as 9°C (49°F) or soar up to 31°C (87°F). Expect some rainy days, with a total precipitation of 106 mm (4.2 in) spread across 14 days. Coupled with an average humidity of 82%, this month offers a unique blend of warm weather and refreshing showers, perfect for enjoying the local scenery!

September Temperature in Joinville

In September in Joinville, the average temperature is 20°C (68°F). The maximum can reach 31°C (87°F), and the minimum can be as low as 9°C (49°F). This mild weather makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Joinville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joinville, September typically has an average temperature of 20°C (68°F), with highs reaching up to 31°C (87°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec787776726765636467707275
Data source: Temperature data for Joinville 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 Joinville

In Joinville in September, the precipitation amount is 106 mm (4.2 in) over a period of 14 days.

September Precipitation Trends in Joinville

The chart displays monthly precipitation patterns in Joinville, 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 Joinville, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec2652042001081121083370106166145209
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Joinville

In Joinville in September humidity is 82%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit sluggish but surprisingly refreshing, as long as you take breaks in shaded areas to cool off.

September Average Humidity in Joinville

This chart illustrates the average monthly humidity levels in Joinville, 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 Joinville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%83%85%85%86%85%80%79%82%82%86%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Joinville

In Joinville in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Joinville.

Maximum UV Index Levels in Joinville for September

The chart shows the monthly maximum UV Index (UVI) for Joinville 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 Joinville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141210766810131415
Data source: Joinville 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 Joinville Compares to Other Months

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

This table compares monthly weather conditions in Joinville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)264 mm (10.4 inches)86%extreme
February Weather25°C (77°F)204 mm (8.0 inches)83%extreme
March Weather24°C (76°F)199 mm (7.9 inches)85%extreme
April Weather22°C (72°F)108 mm (4.3 inches)85%very high
May Weather20°C (67°F)112 mm (4.4 inches)86%high
June Weather18°C (65°F)108 mm (4.3 inches)85%high
July Weather17°C (63°F)33 mm (1.3 inches)80%high
August Weather18°C (64°F)70 mm (2.7 inches)79%very high
September Weather20°C (68°F)106 mm (4.2 inches)82%very high
October Weather21°C (70°F)166 mm (6.5 inches)82%extreme
November Weather22°C (72°F)145 mm (5.7 inches)86%extreme
December Weather24°C (75°F)209 mm (8.2 inches)88%extreme

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