September Weather in Sinop, Brazil

Last updated: August 22, 2025

In Sinop, Brazil, the average temperature in September hovers around 28°C (83°F), with a range that can dip to a cool 18°C (64°F) and soar to a scorching 39°C (102°F). Expect 28 mm (1.1 in) of precipitation spread over 5 days, accompanied by a relatively low average humidity of 25%. Ideal for those who enjoy warm, dry weather!

September Temperature in Sinop

In September in Sinop, the average temperature is 28°C (83°F). Maximum temperatures can reach 39°C (102°F), while minimums can drop to as low as 18°C (64°F). This makes it an ideal time for travelers looking for warm weather while enjoying both the heat of the day and cooler evenings.

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

The chart illustrates September temperature patterns in Sinop, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sinop, September typically has an average temperature of 28°C (83°F), with highs reaching up to 39°C (102°F) and lows dropping to around 18°C (64°F).

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

September Precipitation in Sinop

In Sinop in September, the precipitation amount is 28 mm (1.1 in) over a period of 5 days.

September Precipitation Trends in Sinop

The chart displays monthly precipitation patterns in Sinop, 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 Sinop, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 5 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 Sinop

In Sinop in September, humidity is 25%. With an average temperature of 28°C (83°F), this humidity feels like a comfortable embrace, making it quite pleasant for traveling, as you'll likely enjoy the warm weather without excessive stickiness or discomfort.

September Average Humidity in Sinop

This chart illustrates the average monthly humidity levels in Sinop, 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 Sinop is approximately 25%, 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 Sinop

In Sinop 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 Sinop.

Maximum UV Index Levels in Sinop for September

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

Data source: Sinop 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 Sinop Compares to Other Months

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

This table compares monthly weather conditions in Sinop, 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)	224 mm (8.8 inches)	89%	extreme
February Weather	25°C (77°F)	305 mm (12.0 inches)	88%	extreme
March Weather	25°C (78°F)	244 mm (9.6 inches)	89%	extreme
April Weather	25°C (78°F)	140 mm (5.5 inches)	89%	extreme
May Weather	26°C (78°F)	27 mm (1.0 inches)	78%	extreme
June Weather	25°C (78°F)	2 mm (0.1 inches)	57%	very high
July Weather	25°C (77°F)	0 mm (0.0 inches)	43%	very high
August Weather	27°C (81°F)	4 mm (0.1 inches)	33%	extreme
September Weather	28°C (83°F)	28 mm (1.1 inches)	25%	extreme
October Weather	27°C (80°F)	108 mm (4.3 inches)	24%	extreme
November Weather	25°C (78°F)	260 mm (10.2 inches)	55%	extreme
December Weather	25°C (77°F)	287 mm (11.3 inches)	82%	extreme