December Weather in Bissau, Guinea-Bissau

Last updated: August 23, 2025

In December, the average temperature in Bissau, Guinea-Bissau is a warm 27°C (81°F), with temperatures ranging from a refreshing 18°C (64°F) to a sizzling 37°C (99°F). Expect dry conditions with precipitation at 0 mm (0.0 in) over the entire month, complemented by a comfortable average humidity of 65%.

December Temperature in Bissau

In December in Bissau, the average temperature is 27°C (81°F). Maximum temperatures can reach up to 37°C (99°F), while minimums can dip as low as 18°C (64°F). It’s an ideal time for travelers to enjoy warm weather and outdoor activities in Bissau.

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

The chart illustrates December 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, December typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 18°C (64°F).

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

December Precipitation in Bissau

In Bissau in December, the precipitation amount is 0 mm (0.0 in) during 0 days.

December Precipitation Trends in Bissau

The chart displays monthly precipitation patterns in Bissau, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Bissau, December typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 days.

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

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December Humidity in Bissau

In Bissau in December, humidity is 65%. With an average temperature of 27°C (81°F), this humidity feels like a warm embrace, making travel feel both refreshing and slightly sticky as you explore the sights and sounds around you.

December Average Humidity in Bissau

This chart illustrates the average monthly humidity levels in Bissau, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Bissau is approximately 65%, offering insight into how humid the weather typically is during this month.

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

December UV Index in Bissau

In Bissau in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Bissau.

Maximum UV Index Levels in Bissau for December

The chart shows the monthly maximum UV Index (UVI) for Bissau in December, 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 December, the maximum UV index in Bissau typically reaches 9, which falls under the very high exposure category.

Data source: Bissau December 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 December 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 December’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 December’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