January weather forecast
Dois Irmãos, Brazil

January, the same as December, is another warm summer month in Dois Irmãos, Brazil, with temperature in the range of an average low of 18.8°C (65.8°F) and an average high of 29.1°C (84.4°F).

Temperature

With the onset of January, the average high-temperature stands at a still moderately hot 29.1°C (84.4°F), closely aligned with December's 28.7°C (83.7°F). During January, Dois Irmãos consistently records a temperature low averaging an enjoyable 18.8°C (65.8°F).

Heat index

Throughout January, the heat index is estimated at a torrid 35°C (95°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. 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 highly critical for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in January in Dois Irmãos is 78%.

Rainfall

The months with the most rainfall in Dois Irmãos are January and October, with an average 30mm (1.18") of precipitation.

Daylight

In January, the average length of the day is 13h and 47min.
On the first day of January, sunrise is at 05:27 and sunset at 19:27. On the last day of the month, sunrise is at 05:52 and sunset at 19:22 -03.

Sunshine

In Dois Irmãos, the average sunshine in January is 8.4h.

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index in Dois Irmãos. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 6 during January translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.