January weather forecast
Maria Helena, Brazil

January, like December, in Maria Helena, Brazil, is a moderately hot summer month, with an average temperature varying between 29.8°C (85.6°F) and 20.8°C (69.4°F).

Temperature

The arrival of January sees a recorded average high-temperature of a still warm 29.8°C (85.6°F), showing little divergence from the previous month's conditions. An average low-temperature of 20.8°C (69.4°F) marks the month of January in Maria Helena, Brazil.

Heat index

In January, the average heat index is estimated at a very hot 38°C (100.4°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Maria Helena, the average relative humidity in January is 83%.

Rainfall

The month with the most rainfall is January, when the rain falls for 22 days and typically aggregates up to 127mm (5") of precipitation.

Daylight

In Maria Helena, the average length of the day in January is 13h and 24min.
On the first day of January, sunrise is at 05:49 and sunset at 19:23. On the last day of the month, sunrise is at 06:10 and sunset at 19:21 -03.

Sunshine

In January, the average sunshine is 7.8h.

UV index

The months with the highest UV index are January through March, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 6 in January translates into this advice:
Resist extreme sun exposure. Guarding against solar damage is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.