Bissau
Guinea-Bissau
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Bissau, Guinea-Bissau

Trees along the golden sandy shores of Bijagos Islands in Bissau, Guinea Bissau in West Africa, with ships sailing on the calm waters under clear blue skies
Trees along the golden sandy shores of Bijagos Islands in Bissau, Guinea Bissau in West Africa, with ships sailing on the calm waters under clear blue skies
The first month of the winter, December, is still a hot month in Bissau, Guinea-Bissau, with average temperature ranging between min 18.9°C (66°F) and max 30.6°C (87.1°F).

Temperature

In December, the average high-temperature is almost the same as in November - a still tropical 30.6°C (87.1°F). In Bissau, the average low-temperature is 18.9°C (66°F).

Rainfall

In Bissau, during December, the rain falls for 1 days and regularly aggregates up to 2mm (0.1") of precipitation. In Bissau, during the entire year, the rain falls for 86 days and collects up to 2022.8mm (79.6") of precipitation.

Sea temperature

In Bissau, Guinea-Bissau, the average seawater temperature in December is 27.2°C (81°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The month with the shortest days is December, with an average of 11.4h of daylight.

Sunshine

The average sunshine in Bissau, Guinea-Bissau, is 8h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 9. A UV Index value of 8 to 10 symbolizes a very high threat to health from the exposure to the Sun's UV rays for average individuals.
In December, the average maximum UV index of 9 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in December in Bissau?

In December, the average high-temperature is 30.6°C (87.1°F), and the average low-temperature is 18.9°C (66°F).

How many days does it rain in December in Bissau?

In Bissau, Guinea-Bissau, in December, during 1 rainfall days, 2mm (0.1") of precipitation is typically accumulated.

What is the sea water temperature in December in Bissau?

In Bissau, in December, the average water temperature is 27.2°C (81°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Bissau?

December has the shortest days of the year, with an average of 11.4h of daylight.

How many hours of daylight does Bissau have in December?

The average length of the day in December in Bissau is 11.4h.

How long on average sun shines in December in Bissau?

The average sunshine in December in Bissau is 8h.

When is the lowest UV index in Bissau?

With an average maximum UV index of 9, December is the month with the lowest UV index in Bissau.

What is the UV index intensity in December in Bissau?

The average daily maximum UV index in December in Bissau, Guinea-Bissau, is 9. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays.
Average temperature in December - Bissau, Guinea-Bissau
  • Average high temperature in December: 30.6°C

The warmest month (with the highest average high temperature) is March (33.9°C).
The month with the lowest average high temperature is July (29.4°C).

  • Average low temperature in December: 18.9°C

Months with the highest average low temperature are June, July, August, September and October (22.8°C).
The coldest month (with the lowest average low temperature) is January (17.8°C).

Average rainfall in December - Bissau, Guinea-Bissau
  • Average rainfall in December: 2mm

The wettest month (with the highest rainfall) is August (682.5mm).
Driest months (with the lowest rainfall) are January and March (0.5mm).

Average rainfall days in December - Bissau, Guinea-Bissau
  • Average rainfall days in December: 1 days

The month with the highest number of rainy days is August (22 days).
Months with the lowest number of rainy days are January, February and March (0 days).

Average sea temperature in December - Bissau, Guinea-Bissau
  • Average sea temperature in December: 27.2°C

Best months for swimming (with the highest average sea temperature) are October and November (28.8°C).
The coldest month (with the lowest average sea temperature) is February (24.8°C).

Average daylight in December / Average sunshine in December - Bissau, Guinea-Bissau
  • Average daylight in December: 11.4h

The month with the longest days is June (Average daylight: 12.8h).
The month with shortest days is December (Average daylight: 11.4h).

  • Average sunshine in December: 8h

Months with most sunshine are March and April (Average sunshine: 9h).
The month with least sunshine is August (Average sunshine: 5h).

Average UV index in December - Bissau, Guinea-Bissau
  • Average UV index in December: 9

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).