September Weather in Bissau, India

Last updated: August 23, 2025

In September, the average temperature in Bissau, India soars to an inviting 31°C (87°F). However, expect a varied range, with minimums dipping to 22°C (71°F) and peaks reaching a sizzling 42°C (108°F). During this time, the area experiences approximately 68 mm (2.7 in) of precipitation spread over 10 days, maintaining an average humidity of around 80%. Stay prepared for both warmth and moisture!

September Temperature in Bissau

In September in Bissau, the average temperature is 31°C (87°F), with maximums reaching up to 42°C (108°F) and minimums dropping as low as 22°C (71°F). It's essential to stay hydrated and protect yourself from the sun while enjoying your travels during this warm month.

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

The chart illustrates September temperature patterns in Bissau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bissau, September typically has an average temperature of 31°C (87°F), with highs reaching up to 42°C (108°F) and lows dropping to around 22°C (71°F).

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

September Precipitation in Bissau

In Bissau in September, the precipitation amount is 68 mm (2.7 in) over a span of 10 days.

September Precipitation Trends in Bissau

The chart displays monthly precipitation patterns in Bissau, 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 Bissau, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 10 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 Bissau

In Bissau in September humidity is 80%. With an average temperature of 31°C (87°F), this humidity feels like a heavy blanket enveloping you, making traveling feel like a sweaty endeavor as you navigate through the thick, muggy air.

September Average Humidity in Bissau

This chart illustrates the average monthly humidity levels in Bissau, 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 Bissau is approximately 80%, 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 Bissau

In Bissau 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 Bissau.

Maximum UV Index Levels in Bissau for September

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

Data source: Bissau 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 Bissau Compares to Other Months

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

This table compares monthly weather conditions in Bissau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	14°C (57°F)	13 mm (0.5 inches)	43%	high
February Weather	19°C (66°F)	3 mm (0.1 inches)	34%	high
March Weather	25°C (77°F)	13 mm (0.5 inches)	21%	very high
April Weather	32°C (89°F)	8 mm (0.3 inches)	17%	extreme
May Weather	35°C (94°F)	12 mm (0.5 inches)	19%	extreme
June Weather	35°C (95°F)	57 mm (2.2 inches)	21%	extreme
July Weather	32°C (91°F)	70 mm (2.7 inches)	52%	extreme
August Weather	31°C (88°F)	77 mm (3.0 inches)	81%	extreme
September Weather	31°C (87°F)	68 mm (2.7 inches)	80%	extreme
October Weather	28°C (84°F)	4 mm (0.1 inches)	75%	very high
November Weather	21°C (70°F)	13 mm (0.5 inches)	67%	high
December Weather	15°C (59°F)	4 mm (0.1 inches)	61%	moderate