January weather forecast
Ribeira Afonso, São Tomé and Príncipe

The weather in Ribeira Afonso, São Tomé and Príncipe starts off the year with warm temperatures and a humid climate. This sets the tone for a predominantly tropical weather pattern throughout the year. As the month progresses, there is a noticeable decrease in wind speed from 11.1 Kph to 11.6 Kph, creating calmer atmospheric conditions. Rainfall totals hit 130mm (5.12"), making January one of the wettest months of the year. The frequent rain combined with average temperatures between 27°C (80.6°F) to 28°C (82.4°F), make January a time of lush greenery and vibrant plant life.

Temperature

Ribeira Afonso's shift from December to January is accompanied by an average high-temperature of a still moderately hot 28°C (82.4°F), a slight deviation from 27.5°C (81.5°F). Ribeira Afonso, in January, registers an average low temperature of 27°C (80.6°F), showing a minute reduction from daily highs.

Heat index

For January, the heat index is computed to be a hot 32°C (89.6°F). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
Heat index specifics point out values are for conditions of shade and a slight breeze. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. 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 primarily vital for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

The average relative humidity in January in Ribeira Afonso is 77%.

Rainfall

In Ribeira Afonso, São Tomé and Príncipe, during January, the rain falls for 27.1 days and regularly aggregates up to 130mm (5.12") of precipitation. In Ribeira Afonso, during the entire year, the rain falls for 241.7 days and collects up to 1287mm (50.67") of precipitation.

Daylight

The average length of the day in January in Ribeira Afonso is 12h and 7min.
On the first day of January in Ribeira Afonso, sunrise is at 05:33 and sunset at 17:39. On the last day of the month, sunrise is at 05:43 and sunset at 17:49 GMT.

Sunshine

In Ribeira Afonso, the average sunshine in January is 8.3h.

UV index

The months with the highest UV index in Ribeira Afonso are January through May, October through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, the maximum UV index of 7 suggests this advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.