January weather forecast
Santo Antonio, São Tomé and Príncipe

High humidity levels characterize the weather in Santo Antonio in January, typically reaching an average of 88%. With the temperature lingering between 22°C (71.6°F) and 29°C (84.2°F), warm and moist conditions persist throughout the month. In comparison to the following February, the weather in January is relatively cooler with increased rainfall. January sees prolonged daylight hours, contributing to the warm climate. The equatorial setting of São Tomé and Príncipe orchestrates a robust UV index that demands appropriate protection.

Temperature

The shift into January uncovers an average high-temperature of a still warm 29°C (84.2°F), subtly different from the previous month. Throughout January, the temperature tends to fall to a consistent average low of 22°C (71.6°F).

Heat index

During January, the heat index is computed to be a very hot 37°C (98.6°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

The average relative humidity in January in Santo Antonio is 88%.

Rainfall

In January, in Santo Antonio, São Tomé and Príncipe, the rain falls for 14 days. Throughout January, 113mm (4.45") of precipitation is accumulated. Throughout the year, in Santo Antonio, there are 188 rainfall days, and 1872mm (73.7") of precipitation is accumulated.

Sea temperature

In Santo Antonio, the average seawater temperature in January is 28°C (82.4°F).
Note: For swimming, diving, or other water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) provide the most enjoyable experience for extended periods without discomfort.

Daylight

The average length of the day in January in Santo Antonio is 12h and 2min.
On the first day of January in Santo Antonio, sunrise is at 05:32 and sunset at 17:34. On the last day of the month, sunrise is at 05:42 and sunset at 17:45 GMT.

Sunshine

January through June, November and December, with an average of 4h of sunshine, are months with the most sunshine in Santo Antonio.

UV index

January through May, August through November, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an excessive health risk from unsafe exposure to UV radiation for average individuals.
Note: In January, the maximum UV index of 12 transforms into these recommendations:
Enforce all necessary precautions, unprotected skin might burn swiftly. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. One should apply and reapply liberally a broad-spectrum sunscreen of SPF 30+ every two hours and immediately after a swim or an outdoor exercise. Notice! Sand and water reflections contribute to a stronger UV exposure.