December weather forecast
Boa Esperança, São Tomé and Príncipe

December sees a slight decrease in temperature and rainfall while maintaining high relative humidity and sunlight levels in Boa Esperança, São Tomé and Príncipe. The climate becomes slightly cooler with the average high temperature dropping to 27.5°C (81.5°F). Cloud cover diminishes, improving visibility, while the days fill with ample sunlight enhancing the overall experience of the city. Evening breezes lower temperature, making the climate rather enjoyable despite it being the wet season. Rainfall continues but at a lower scale, reminding that December is still part of the tropical wet season.

Temperature

November's transformation into December witnesses an average high-temperature of a still warm 27.5°C (81.5°F), noting a minor change from the preceding month. With a barely noticeable fluctuation in temperature, Boa Esperança reaches an average low of 26.6°C (79.9°F) during the December nights.

Heat index

During December, the heat index is calculated to be a tropical 31°C (87.8°F). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
Heat index data is primarily for areas with shade and subjected to light winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

The average relative humidity in December in Boa Esperança, São Tomé and Príncipe, is 79%.

Rainfall

In Boa Esperança, São Tomé and Príncipe, in December, during 28.6 rainfall days, 159mm (6.26") of precipitation is typically accumulated. In Boa Esperança, São Tomé and Príncipe, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.

Daylight

December has the shortest days of the year in Boa Esperança, with an average of 12h and 6min of daylight.
On the first day of December in Boa Esperança, sunrise is at 05:19 and sunset at 17:25. On the last day of the month, sunrise is at 05:33 and sunset at 17:39 GMT.

Sunshine

In Boa Esperança, São Tomé and Príncipe, the average sunshine in December is 8.2h.

UV index

January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 7 in December translates into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.