September Weather in Assai, Brazil

Last updated: August 22, 2025

In September, the average temperature in Assai, Brazil hovers around 24°C (75°F). While you can expect pleasant days, temperatures can dip as low as 11°C (52°F) and soar to a scorching 38°C (101°F). During this month, rainfall totals about 38 mm (1.5 in), typically spread over 4 days, and the air maintains an average humidity of 47%.

September Temperature in Assai

In September in Assai, the average temperature is 24°C (75°F). Maximum temperatures can reach 38°C (101°F), while minimums can drop to as low as 11°C (52°F). Be prepared for warm days and cool nights, making it ideal for a range of outdoor activities.

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

The chart illustrates September temperature patterns in Assai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Assai, September typically has an average temperature of 24°C (75°F), with highs reaching up to 38°C (101°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Assai

In Assai in September, the total precipitation amount is 38 mm (1.5 in) spread over the course of 4 days.

September Precipitation Trends in Assai

The chart displays monthly precipitation patterns in Assai, 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 Assai, September typically receives around 38 mm (1.5 inches) of precipitation spread over approximately 4 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 Assai

In Assai in September, humidity is 47%. With an average temperature of 24°C (75°F), this humidity feels like a refreshing embrace, making outdoor activities enjoyable but also reminding travelers to stay hydrated and take breaks in the shade.

September Average Humidity in Assai

This chart illustrates the average monthly humidity levels in Assai, 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 Assai is approximately 47%, 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 Assai

In Assai in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Assai.

Maximum UV Index Levels in Assai for September

The chart shows the monthly maximum UV Index (UVI) for Assai 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 Assai typically reaches 11, which falls under the extreme exposure category.

Data source: Assai 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 Assai Compares to Other Months

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

This table compares monthly weather conditions in Assai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	172 mm (6.8 inches)	84%	extreme
February Weather	25°C (77°F)	130 mm (5.1 inches)	81%	extreme
March Weather	25°C (78°F)	92 mm (3.6 inches)	81%	extreme
April Weather	23°C (74°F)	49 mm (1.9 inches)	75%	extreme
May Weather	20°C (69°F)	65 mm (2.5 inches)	68%	very high
June Weather	19°C (67°F)	69 mm (2.7 inches)	64%	high
July Weather	19°C (66°F)	24 mm (0.9 inches)	58%	high
August Weather	20°C (68°F)	71 mm (2.8 inches)	49%	very high
September Weather	24°C (75°F)	38 mm (1.5 inches)	47%	extreme
October Weather	24°C (75°F)	118 mm (4.6 inches)	44%	extreme
November Weather	25°C (76°F)	88 mm (3.5 inches)	68%	extreme
December Weather	25°C (78°F)	132 mm (5.2 inches)	82%	extreme