January weather forecast
Barreirinha, Brazil

January, the same as December, in Barreirinha, Brazil, is a hot summer month, with an average temperature varying between 23°C (73.4°F) and 31.4°C (88.5°F).

Temperature

The arrival of January brings an average high-temperature of a still tropical 31.4°C (88.5°F), nearly identical to December's 33.2°C (91.8°F). During January, the average low-temperature in Barreirinha is a moderately hot 23°C (73.4°F).

Heat index

The heat index for January is estimated at a blisteringly hot 43°C (109.4°F). Watchful: Heat cramps and heat exhaustion are predicted. Continued exertion could lead to heatstroke.
Understand that the heat index values take into account shaded locations and mild 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 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In January, the average relative humidity is 81%.

Rainfall

In Barreirinha, in January, it is raining for 22.8 days, with typically 62mm (2.44") of accumulated precipitation. Throughout the year, there are 201.8 rainfall days, and 607mm (23.9") of precipitation is accumulated.

Daylight

The average length of the day in January is 12h and 16min.
On the first day of January, sunrise is at 05:43 and sunset at 18:00. On the last day of the month, sunrise is at 05:54 and sunset at 18:08 -04.

Sunshine

The average sunshine in January is 8h.

UV index

In January, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 7 during January translates into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.