September Weather in Sao Sebastiao do Cai, Brazil

Last updated: August 22, 2025

In September, the average temperature in Sao Sebastiao do Cai, Brazil hovers around 17°C (64°F). Expect minimum temperatures dropping to 2°C (35°F), while the mercury can peak at a maximum of 35°C (94°F). Be prepared for some rain as well, with 193 mm (7.6 in) of precipitation spread over about 12 days. The air will feel humid too, with an average humidity level of 80%.

September Temperature in Sao Sebastiao do Cai

In September in Sao Sebastiao do Cai, the average temperature is 17°C (64°F). Maximum temperatures can reach 35°C (94°F), while minimums can dip as low as 2°C (35°F). Be sure to pack layers to accommodate the wide range of temperatures when traveling.

September Weather in Sao Sebastiao do Cai: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sao Sebastiao do Cai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Sebastiao do Cai, September typically has an average temperature of 17°C (64°F), with highs reaching up to 35°C (94°F) and lows dropping to around 2°C (35°F).

Data source: Temperature data for Sao Sebastiao do Cai generated using information from the Copernicus Climate Change Service.

September Precipitation in Sao Sebastiao do Cai

In Sao Sebastiao do Cai in September, the precipitation amount is 193 mm (7.6 in) spread over 12 days.

September Precipitation Trends in Sao Sebastiao do Cai

The chart displays monthly precipitation patterns in Sao Sebastiao do Cai, 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 Sao Sebastiao do Cai, September typically receives around 193 mm (7.6 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Sao Sebastiao do Cai

In Sao Sebastiao do Cai in September, humidity is 80%. With an average temperature of 17°C (64°F), this humidity feels like a warm blanket wrapping around you, making travel somewhat uncomfortable as the air feels heavy and oppressive.

September Average Humidity in Sao Sebastiao do Cai

This chart illustrates the average monthly humidity levels in Sao Sebastiao do Cai, 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 Sao Sebastiao do Cai is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sao Sebastiao do Cai

In Sao Sebastiao do Cai in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Sao Sebastiao do Cai.

Maximum UV Index Levels in Sao Sebastiao do Cai for September

The chart shows the monthly maximum UV Index (UVI) for Sao Sebastiao do Cai 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 Sao Sebastiao do Cai typically reaches 9, which falls under the very high exposure category.

Data source: Sao Sebastiao do Cai 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 Sao Sebastiao do Cai Compares to Other Months

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

This table compares monthly weather conditions in Sao Sebastiao do Cai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	160 mm (6.3 inches)	80%	extreme
February Weather	23°C (74°F)	142 mm (5.6 inches)	77%	extreme
March Weather	22°C (71°F)	136 mm (5.4 inches)	79%	extreme
April Weather	20°C (68°F)	100 mm (3.9 inches)	83%	very high
May Weather	16°C (61°F)	177 mm (7.0 inches)	88%	high
June Weather	15°C (59°F)	140 mm (5.5 inches)	86%	moderate
July Weather	14°C (57°F)	140 mm (5.5 inches)	82%	moderate
August Weather	15°C (60°F)	93 mm (3.7 inches)	77%	high
September Weather	17°C (64°F)	193 mm (7.6 inches)	80%	very high
October Weather	19°C (66°F)	174 mm (6.9 inches)	84%	extreme
November Weather	21°C (69°F)	147 mm (5.8 inches)	83%	extreme
December Weather	23°C (73°F)	114 mm (4.5 inches)	87%	extreme