January weather forecast
Arco-Íris, Brazil

January, like December, in Arco-Íris, Brazil, is a moderately hot summer month, with an average temperature varying between 20.8°C (69.4°F) and 29.2°C (84.6°F).

Temperature

The start of January sees the average high-temperature at a still warm 29.2°C (84.6°F), showing little difference from December's 29.6°C (85.3°F). During the month of January, an average low-temperature of 20.8°C (69.4°F) is recorded in Arco-Íris.

Heat index

January's average heat index is calculated to be a sweltering 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in January in Arco-Íris is 83%.

Rainfall

The month with the most rainfall is January, when the rain falls for 28.3 days and typically aggregates up to 203mm (7.99") of precipitation.

Daylight

In January, the average length of the day is 13h and 17min.
On the first day of January in Arco-Íris, Brazil, sunrise is at 05:42 and sunset at 19:08. On the last day of the month, sunrise is at 06:02 and sunset at 19:07 -03.

Sunshine

With an average of 7h of sunshine, January has the least sunshine of the year in Arco-Íris.

UV index

January through March, July through December, with an average maximum UV index of 6, are months with the highest UV index in Arco-Íris. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In January, a regular UV index of 6 translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.