January weather forecast
Barreirinhas, Brazil

January, like December, is another hot summer month in Barreirinhas, Brazil, with an average temperature varying between 25.7°C (78.3°F) and 30°C (86°F).

Temperature

January's advent notes a subtle adjustment in average high-temperature to a still hot 30°C (86°F) from December. The January nights show a slight decrease to a mean low-temperature of 25.7°C (78.3°F).

Heat index

The heat index value for January is appraised at a very hot 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In Barreirinhas, the average relative humidity in January is 78%.

Rainfall

In Barreirinhas, in January, during 22 rainfall days, 131mm (5.16") of precipitation is typically accumulated. Throughout the year, there are 225.4 rainfall days, and 1281mm (50.43") 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 05:46 and sunset at 18:03. On the last day of the month, sunrise is at 05:57 and sunset at 18:11 -03.

Sunshine

The month with the most sunshine is January, with an average of 10h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Barreirinhas are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: During January, 7 as the daily maximum UV index converts into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.