December weather forecast
Mayumba, Gabon

In December, Mayumba sees weather conditions stabilize, marking a tapering off of the rainy season. The city receives reduced rainfall in December, down to 164mm (6.46"), from the high of November, signaling a drier end to the year. The coast boasts of warm, enjoyable evenings due to the moderate sea temperatures. While preparations for year-end celebrations are underway, the local landscapes exhibit a rich, deep green sheen. The friendly conditions, teamed with extended daylight hours, make December an attractive time for tourist activities and year-end celebrations in this Gabonese town.

Temperature

The onset of December in Mayumba brings an average high-temperature of a still warm 27.2°C (81°F), nearly matching the November temperature. Mayumba registers a gentle descent to an average nighttime low of 22.9°C (73.2°F) in December from its daytime highs.

Heat index

December's heat index is evaluated at a tropical 31°C (87.8°F). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

The average relative humidity in December in Mayumba, Gabon, is 87%.

Rainfall

In Mayumba, in December, during 11.5 rainfall days, 164mm (6.46") of precipitation is typically accumulated. Throughout the year, there are 124.6 rainfall days, and 1673mm (65.87") of precipitation is accumulated.

Sea temperature

In Mayumba, in December, the average water temperature is 26.3°C (79.3°F).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 25°C (77°F) to 29°C (84.2°F) is very pleasurable for extended periods, without any discomfort.

Daylight

The month with the longest days is December, with an average of 12h and 18min of daylight.
On the first day of the month, sunrise is at 05:57 and sunset at 18:15. On the last day of December, sunrise is at 06:10 and sunset at 18:30 WAT.

Sunshine

In Mayumba, the average sunshine in December is 4h.

UV index

The months with the highest UV index are January through April, August through December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 12 in December translates into the following instructions:
Take all critical precautions, unprotected skin might burn swiftly. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Use liberally and reapply a broad-spectrum sunscreen with at least SPF 30 every two hours and right after outdoor activities or a swim. Heads up! UV intensity is amplified by reflections from water and sand.