August Weather in Bissau, Guinea-Bissau

Last updated: August 23, 2025

In Bissau, Guinea-Bissau, the average temperature in August hovers around 27°C (80°F). Expect a comfortable range, with minimums dipping to 23°C (74°F) and maximums soaring to 32°C (90°F). However, be prepared for significant rain, with an average precipitation of 539 mm (21.2 in) spread over 29 days. The air is often quite humid, with an average humidity level of 86%.

August Temperature in Bissau

In August in Bissau, the average temperature is 27°C (80°F). The maximum can reach 32°C (90°F), while the minimum can drop to as low as 23°C (74°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the vibrant attractions of Bissau.

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

The chart illustrates August 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, August typically has an average temperature of 27°C (80°F), with highs reaching up to 32°C (90°F) and lows dropping to around 23°C (74°F).

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

August Precipitation in Bissau

In Bissau in August, the total precipitation amount is 539 mm (21.2 in) spread over 29 days.

August Precipitation Trends in Bissau

The chart displays monthly precipitation patterns in Bissau, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Bissau, August typically receives around 539 mm (21.2 inches) of precipitation spread over approximately 29 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Bissau

In Bissau in August, humidity is 86%. With an average temperature of 27°C (80°F), this humidity feels like a warm, sticky blanket enveloping you, making travel feel heavy and exhausting as you navigate the sultry air.

August Average Humidity in Bissau

This chart illustrates the average monthly humidity levels in Bissau, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Bissau is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Bissau

In Bissau in August, 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 Bissau, you can check here.

Maximum UV Index Levels in Bissau for August

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

Data source: Bissau August 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 August 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 August’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 August’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 (82°F)	0 mm (0.0 inches)	64%	very high
March Weather	28°C (83°F)	0 mm (0.0 inches)	64%	extreme
April Weather	29°C (84°F)	0 mm (0.0 inches)	73%	extreme
May Weather	28°C (84°F)	1 mm (0.1 inches)	76%	extreme
June Weather	28°C (84°F)	52 mm (2.0 inches)	80%	extreme
July Weather	27°C (81°F)	453 mm (17.8 inches)	81%	extreme
August Weather	27°C (80°F)	539 mm (21.2 inches)	86%	extreme
September Weather	27°C (81°F)	369 mm (14.5 inches)	84%	extreme
October Weather	28°C (83°F)	134 mm (5.3 inches)	80%	extreme
November Weather	29°C (84°F)	24 mm (0.9 inches)	73%	very high
December Weather	27°C (81°F)	0 mm (0.0 inches)	65%	very high