September Weather in Bolama, Guinea-Bissau

Last updated: August 23, 2025

In September, the average temperature in Bolama, Guinea-Bissau hovers around 27°C (81°F), with a minimum of 24°C (75°F) and a maximum reaching up to 32°C (89°F). Expect high humidity levels at 84%, coupled with significant rainfall, averaging 388 mm (15.3 in) over 27 days. Be prepared for a warm, wet climate!

September Temperature in Bolama

In September in Bolama, the average temperature is 27°C (81°F), with maximums reaching up to 32°C (89°F) and minimums dropping to as low as 24°C (75°F). This pleasant climate makes it an ideal time to explore and enjoy outdoor activities in Bolama.

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

The chart illustrates September temperature patterns in Bolama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bolama, September typically has an average temperature of 27°C (81°F), with highs reaching up to 32°C (89°F) and lows dropping to around 24°C (75°F).

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

September Precipitation in Bolama

In Bolama in September, the precipitation amount is 388 mm (15.3 in) spread over 27 days.

September Precipitation Trends in Bolama

The chart displays monthly precipitation patterns in Bolama, 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 Bolama, September typically receives around 388 mm (15.3 inches) of precipitation spread over approximately 27 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 Bolama

In Bolama in September humidity is 84%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, moist blanket, making travel uncomfortable and sticky, as every step seems to weigh you down with the heavy air.

September Average Humidity in Bolama

This chart illustrates the average monthly humidity levels in Bolama, 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 Bolama is approximately 84%, 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 Bolama

In Bolama in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Bolama, you can check here.

Maximum UV Index Levels in Bolama for September

The chart shows the monthly maximum UV Index (UVI) for Bolama 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 Bolama typically reaches 14, which falls under the extreme exposure category.

Data source: Bolama 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 Bolama Compares to Other Months

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

This table compares monthly weather conditions in Bolama, 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 (80°F)	0 mm (0.0 inches)	57%	very high
February Weather	27°C (80°F)	0 mm (0.0 inches)	64%	very high
March Weather	27°C (81°F)	0 mm (0.0 inches)	64%	extreme
April Weather	27°C (81°F)	0 mm (0.0 inches)	73%	extreme
May Weather	27°C (81°F)	2 mm (0.1 inches)	76%	extreme
June Weather	28°C (82°F)	60 mm (2.4 inches)	80%	extreme
July Weather	27°C (80°F)	555 mm (21.8 inches)	81%	extreme
August Weather	26°C (80°F)	598 mm (23.5 inches)	86%	extreme
September Weather	27°C (81°F)	388 mm (15.3 inches)	84%	extreme
October Weather	28°C (83°F)	130 mm (5.1 inches)	80%	extreme
November Weather	29°C (84°F)	27 mm (1.1 inches)	73%	very high
December Weather	27°C (82°F)	0 mm (0.0 inches)	65%	very high