January weather forecast
São Francisco do Piauí, Brazil

January, like December, is another hot summer month in São Francisco do Piauí, Brazil, with an average temperature ranging between min 22.6°C (72.7°F) and max 32.4°C (90.3°F).

Temperature

São Francisco do Piauí experiences an average high-temperature of a still tropical 32.4°C (90.3°F) in January, marking an insignificant shift from 33.9°C (93°F) in December. In the month of January, São Francisco do Piauí's average low-temperature falls to a pleasant 22.6°C (72.7°F).

Heat index

The heat index value for January is computed to be a blistering 42°C (107.6°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The average relative humidity in January is 70%.

Rainfall

In São Francisco do Piauí, in January, during 24.9 rainfall days, 130mm (5.12") of precipitation is typically accumulated. Throughout the year, in São Francisco do Piauí, there are 159.4 rainfall days, and 844mm (33.23") of precipitation is accumulated.

Daylight

In São Francisco do Piauí, the average length of the day in January is 12h and 29min.
On the first day of January, sunrise is at 05:37 and sunset at 18:09. On the last day of the month, sunrise is at 05:50 and sunset at 18:16 -03.

Sunshine

The average sunshine in January in São Francisco do Piauí is 9.3h.

UV index

The month with the lowest UV index in São Francisco do Piauí, Brazil, is January, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In January, the UV index of 6 transforms into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.