January weather forecast
Rio Grande do Piauí, Brazil

January, the same as December, in Rio Grande do Piauí, Brazil, is another hot summer month, with an average temperature varying between 31.6°C (88.9°F) and 22.8°C (73°F).

Temperature

Rio Grande do Piauí records a slight change with January's average high-temperatures adjusting to a still hot 31.6°C (88.9°F) from December's 33.2°C (91.8°F). Rio Grande do Piauí cools down to an average low-temperature of 22.8°C (73°F) throughout the month of January.

Heat index

For most parts of January, the heat index is estimated at a scorching 40°C (104°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In January, the average relative humidity is 73%.

Rainfall

In January, in Rio Grande do Piauí, the rain falls for 23.5 days. Throughout January, 96mm (3.78") of precipitation is accumulated. In Rio Grande do Piauí, during the entire year, the rain falls for 157.4 days and collects up to 636mm (25.04") of precipitation.

Daylight

In January, the average length of the day in Rio Grande do Piauí, Brazil, is 12h and 31min.
On the first day of January, sunrise is at 05:38 and sunset at 18:12. On the last day of the month, sunrise is at 05:52 and sunset at 18:19 -03.

Sunshine

In Rio Grande do Piauí, Brazil, the average sunshine in January is 9.2h.

UV index

The months with the lowest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 7 in January translates into this advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. 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. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.