December weather forecast
Bissau, Guinea-Bissau

In December, Bissau rounds off the year with a mere 2mm (0.08") of rainfall, indicating the fullest transition to the dry season. The metropolis basks in the mercifully cooler winter sun under 11.4 hours of daylight. As temperatures begin to drop, sea temperatures follow suit, recording a still-warm 27.2°C (81°F). The barely discernible drop in UV index is indicative of the persistent radiant conditions. December provides an ideal setting for indulging in the vibrant nightlife and varied cuisine on offer in Bissau, making it a perfect prelude to the coming year.

Temperature

A minimal variation is noted in Bissau's average high-temperature at the onset of December, reaching a still tropical 30.6°C (87.1°F) from November's 31.7°C (89.1°F). Bissau records a steady low-temperature average of 18.9°C (66°F) during December.

Rainfall

In Bissau, during December, the rain falls for 1 days and regularly aggregates up to 2mm (0.08") of precipitation. Throughout the year, there are 86 rainfall days, and 2023mm (79.65") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature in Bissau is 27.2°C (81°F).
Note: Swimming, diving, and similar water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as very agreeable and pleasurable for lengthy periods without discomfort.

Daylight

The month with the shortest days in Bissau is December, with an average of 11h and 24min of daylight.
On the first day of December, sunrise is at 07:07 and sunset at 18:36. On the last day of the month, sunrise is at 07:22 and sunset at 18:48 GMT.

Sunshine

In December, the average sunshine is 8h.

UV index

The month with the lowest UV index in Bissau is December, with an average maximum UV index of 9. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 9 transforms into these recommendations:
Ensure you're always protected. Unprotected skin can get damaged in moments. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Applying and reapplying a broad-spectrum sunscreen with a minimum SPF 30 after every two hours, outdoor workout, or swim is recommended. Attention! The reflection of both water and sand can increase the intensity of UV rays.