September Weather in Guaira, Brazil

Last updated: August 22, 2025

In September, the average temperature in Guaira, Brazil hovers around 27°C (81°F). However, be prepared for a wide range: temperatures can dip to a minimum of 13°C (56°F) and soar to a maximum of 40°C (104°F). Expect a modest precipitation amount of 20 mm (0.8 in) over just 2 days, while average humidity rests comfortably at 41%.

September Temperature in Guaira

In September in Guaira, the average temperature is 27°C (81°F). Maximums can reach 40°C (104°F), while minimums can drop as low as 13°C (56°F). It's a great time to visit, so pack accordingly to enjoy a mix of warm days and cooler nights!

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

The chart illustrates September temperature patterns in Guaira, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guaira, September typically has an average temperature of 27°C (81°F), with highs reaching up to 40°C (104°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Guaira

In Guaira in September, the precipitation amount is 20 mm (0.8 in) over the course of 2 days.

September Precipitation Trends in Guaira

The chart displays monthly precipitation patterns in Guaira, 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 Guaira, September typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 2 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Guaira

In Guaira in September humidity is 41%. With an average temperature of 27°C (81°F), this humidity feels like a warm embrace, making it comfortable for exploring outdoor attractions without overwhelming discomfort.

September Average Humidity in Guaira

This chart illustrates the average monthly humidity levels in Guaira, 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 Guaira is approximately 41%, 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 Guaira

In Guaira 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 Guaira.

Maximum UV Index Levels in Guaira for September

The chart shows the monthly maximum UV Index (UVI) for Guaira 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 Guaira typically reaches 12, which falls under the extreme exposure category.

Data source: Guaira 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 Guaira Compares to Other Months

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

This table compares monthly weather conditions in Guaira, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	145 mm (5.7 inches)	85%	extreme
February Weather	26°C (79°F)	160 mm (6.3 inches)	87%	extreme
March Weather	26°C (79°F)	100 mm (3.9 inches)	86%	extreme
April Weather	25°C (77°F)	47 mm (1.9 inches)	79%	extreme
May Weather	22°C (73°F)	23 mm (0.9 inches)	68%	very high
June Weather	22°C (72°F)	2 mm (0.1 inches)	60%	high
July Weather	21°C (71°F)	4 mm (0.2 inches)	57%	very high
August Weather	24°C (75°F)	10 mm (0.4 inches)	48%	very high
September Weather	27°C (81°F)	20 mm (0.8 inches)	41%	extreme
October Weather	27°C (81°F)	82 mm (3.2 inches)	35%	extreme
November Weather	26°C (79°F)	164 mm (6.5 inches)	65%	extreme
December Weather	26°C (79°F)	172 mm (6.8 inches)	80%	extreme