September Weather in Boa Vista, Brazil

Last updated: August 22, 2025

In September, the average temperature in Boa Vista, Brazil is a warm 28°C (83°F), with minimums dipping to 23°C (73°F) and maximums reaching up to 35°C (95°F). Expect 119 mm (4.7 in) of precipitation spread over 17 days, accompanied by an average humidity of 60%. Perfect for those who enjoy mild tropical climates!

September Temperature in Boa Vista

In September in Boa Vista, the average temperature is 28°C (83°F), with maximums reaching 35°C (95°F) and minimums dropping to as low as 23°C (73°F). This warm climate makes Boa Vista an ideal destination for sun-seekers and outdoor enthusiasts.

September Weather in Boa Vista: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Boa Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boa Vista, September typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (95°F) and lows dropping to around 23°C (73°F).

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

September Precipitation in Boa Vista

In Boa Vista in September, the precipitation amount is 119 mm (4.7 in) spread across 17 days.

September Precipitation Trends in Boa Vista

The chart displays monthly precipitation patterns in Boa Vista, 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 Boa Vista, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 17 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 Boa Vista

In Boa Vista in September, humidity is 60%. With an average temperature of 28°C (83°F), this humidity feels like a warm, enveloping blanket, making travel feel both invigorating and a bit sticky, as the air clings to you while you explore.

September Average Humidity in Boa Vista

This chart illustrates the average monthly humidity levels in Boa Vista, 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 Boa Vista is approximately 60%, 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 Boa Vista

In Boa Vista 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 Boa Vista.

Maximum UV Index Levels in Boa Vista for September

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

Data source: Boa Vista 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 Boa Vista Compares to Other Months

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

This table compares monthly weather conditions in Boa Vista, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (83°F)	52 mm (2.1 inches)	44%	extreme
February Weather	29°C (84°F)	33 mm (1.3 inches)	40%	extreme
March Weather	29°C (84°F)	70 mm (2.7 inches)	38%	extreme
April Weather	28°C (83°F)	164 mm (6.5 inches)	39%	extreme
May Weather	27°C (80°F)	384 mm (15.1 inches)	60%	extreme
June Weather	26°C (80°F)	360 mm (14.2 inches)	89%	extreme
July Weather	26°C (79°F)	304 mm (12.0 inches)	84%	extreme
August Weather	27°C (81°F)	183 mm (7.2 inches)	77%	extreme
September Weather	28°C (83°F)	119 mm (4.7 inches)	60%	extreme
October Weather	29°C (84°F)	71 mm (2.8 inches)	40%	extreme
November Weather	29°C (84°F)	135 mm (5.3 inches)	44%	extreme
December Weather	28°C (83°F)	75 mm (3.0 inches)	49%	extreme