September Weather in Teresina, Brazil

Last updated: August 22, 2025

In Teresina, Brazil, the average temperature in September reaches a warm 30°C (86°F), with lows dipping to 21°C (71°F) and highs soaring up to a scorching 39°C (102°F). Expect minimal precipitation, averaging just 3 mm (0.1 in) over 0 days, and enjoy the dry atmosphere with an average humidity of 36%.

September Temperature in Teresina

In September in Teresina, the average temperature is 30°C (86°F). Maximum temperatures can reach 39°C (102°F), while the minimum can drop to as low as 21°C (71°F). It's an ideal time for travelers who enjoy warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Teresina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Teresina, September typically has an average temperature of 30°C (86°F), with highs reaching up to 39°C (102°F) and lows dropping to around 21°C (71°F).

Data source: Temperature data for Teresina generated using information from the Copernicus Climate Change Service.

September Precipitation in Teresina

In Teresina in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

September Precipitation Trends in Teresina

The chart displays monthly precipitation patterns in Teresina, 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 Teresina, September typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 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 Teresina

In Teresina in September humidity is 36%. With an average temperature of 30°C (86°F), this humidity feels like a warm and comfortable embrace, making it enjoyable for exploring the local sights and indulging in outdoor activities.

September Average Humidity in Teresina

This chart illustrates the average monthly humidity levels in Teresina, 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 Teresina is approximately 36%, 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 Teresina

In Teresina in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Teresina.

Maximum UV Index Levels in Teresina for September

The chart shows the monthly maximum UV Index (UVI) for Teresina 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 Teresina typically reaches 13, which falls under the extreme exposure category.

Data source: Teresina 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 Teresina Compares to Other Months

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

This table compares monthly weather conditions in Teresina, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	173 mm (6.8 inches)	90%	extreme
February Weather	27°C (80°F)	312 mm (12.3 inches)	91%	extreme
March Weather	27°C (80°F)	320 mm (12.6 inches)	92%	extreme
April Weather	27°C (81°F)	263 mm (10.4 inches)	93%	extreme
May Weather	27°C (82°F)	74 mm (2.9 inches)	88%	extreme
June Weather	28°C (82°F)	9 mm (0.3 inches)	75%	extreme
July Weather	28°C (82°F)	12 mm (0.5 inches)	52%	extreme
August Weather	29°C (84°F)	3 mm (0.1 inches)	42%	extreme
September Weather	30°C (86°F)	3 mm (0.1 inches)	36%	extreme
October Weather	31°C (87°F)	11 mm (0.4 inches)	35%	extreme
November Weather	30°C (86°F)	50 mm (2.0 inches)	43%	extreme
December Weather	29°C (84°F)	100 mm (3.9 inches)	76%	extreme