January weather forecast
Mata de São João, Brazil

January, like December, is another tropical summer month in Mata de São João, Brazil, with an average temperature ranging between min 24°C (75.2°F) and max 30.1°C (86.2°F).

Temperature

In January, Mata de São João experiences a minor shift in meteorological conditions with average high-temperatures marked at a still tropical 30.1°C (86.2°F), closely mirroring the climate in December. Mata de São João, during January nights, observes an average temperature of 24°C (75.2°F).

Heat index

January's mean heat index is computed to be a sweltering 37°C (98.6°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The months with the lowest humidity are January and February, with an average relative humidity of 75%.

Rainfall

In January, the rain falls for 16.8 days. Throughout January, 39mm (1.54") of precipitation is accumulated. Throughout the year, in Mata de São João, there are 209.9 rainfall days, and 701mm (27.6") of precipitation is accumulated.

Daylight

In Mata de São João, the average length of the day in January is 12h and 46min.
On the first day of the month, sunrise is at 05:11 and sunset at 18:02. On the last day of January, sunrise is at 05:26 and sunset at 18:06 -03.

Sunshine

With an average of 10.6h of sunshine, January has the most sunshine of the year in Mata de São João.

UV index

The months with the highest UV index in Mata de São João are January through April, October through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 7 in January, converts into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.