December weather forecast
Saint Louis, Senegal

December in Saint Louis ushers in a shift towards cooler weather, with the average lowest dropping to 16.4°C (61.5°F). This month is also subject to minor rainfall of only 1mm (0.04"), continuing the dry streak initiated in November. Throughout December, high temperatures hover around 31°C (87.8°F), and the city experiences decreasing humidity, marking an excellent time to walk around and explore. The sea temperature stands at 23.3°C (73.9°F), making a swim in the sea a brisk but enjoyable experience. As the daylight hours draw in, the city becomes a spectacle of twinkling lights, offering a charming holiday ambiance.

Temperature

The transition into December in Saint Louis reveals an average high-temperature of a still tropical 31°C (87.8°F), mirroring a close resemblance to November. In December, a remarkable difference from daytime highs is noted, as Saint Louis records an average temperature of 16.4°C (61.5°F) during the night.

Heat index

The heat index value for December is computed to be a tropical 32°C (89.6°F). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

In Saint Louis, Senegal, the average relative humidity in December is 45%.

Rainfall

Throughout December, 1mm (0.04") of precipitation is accumulated. During the entire year, Saint Louis aggregates up to 261mm (10.28") of precipitation.

Sea temperature

In Saint Louis, in December, the average water temperature is 23.3°C (73.9°F).
Note: Considering one's resistance to cold, elements like sunshine, wind, and the prevailing temperature matter when taking a swim in 23.3°C (73.9°F) waters. (For comparison, the Olympic swimming standard is set between 25°C (77°F) and 28°C (82.4°F).)

Daylight

December has the shortest days of the year in Saint Louis, with an average of 11h and 12min of daylight.
On the first day of December in Saint Louis, sunrise is at 07:17 and sunset at 18:32. On the last day of the month, sunrise is at 07:33 and sunset at 18:44 GMT.

Sunshine

The average sunshine in December is 7.5h.

UV index

January and December, with an average maximum UV index of 8, are months with the lowest UV index. A UV Index reading of 8 to 10 represents a very high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 8 in December transforms into the following instructions:
Don't neglect protection; skin and eyes can be burned swiftly if left exposed. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Caution! Sand and water surfaces escalate the UV intensity from the Sun.