January weather forecast
Poiso Alto, São Tomé and Príncipe

The calendar year in Poiso Alto, São Tomé and Príncipe, begins with the month of January that introduces a moderate climate. Intriguingly, January and its subsequent month share the same average daily sunlight hours, a relatively brisk trend that prevails throughout the year. Moreover, the prevailing wind speed and cloud cover show a minimal yet noticeable monthly increase. The month's most noticeable characteristic features include the temperature fluctuating from 27°C (80.6°F) to 28°C (82.4°F) and the gravity of 130mm (5.12") rainfall. Consistently, the weather pattern promotes a rather mild period to start the year.

Temperature

Poiso Alto observes a minor difference in average high-temperatures between December's 27.5°C (81.5°F) and January's 28°C (82.4°F). In Poiso Alto, the nightly January temperatures experience a slight descent from daily highs to an average low of 27°C (80.6°F).

Heat index

The heat index value during January is calculated to be a tropical 32°C (89.6°F). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate 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. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

In Poiso Alto, the average relative humidity in January is 77%.

Rainfall

In Poiso Alto, during January, the rain falls for 27.1 days and regularly aggregates up to 130mm (5.12") of precipitation. In Poiso Alto, 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

The months with the shortest days in Poiso Alto are January, November and December, with an average of 12h and 6min of daylight.
On the first day of the month, sunrise is at 05:33 and sunset at 17:40. On the last day of January, sunrise is at 05:43 and sunset at 17:50 GMT.

Sunshine

In January, the average sunshine in Poiso Alto is 8.3h.

UV index

The months with the highest UV index are January through May, October through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high daily UV index of 7 during January translates into the following directions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.