January weather forecast
Alto Parnaíba, Brazil

January, like December, is another hot summer month in Alto Parnaíba, Brazil, with an average temperature fluctuating between 30.2°C (86.4°F) and 21.4°C (70.5°F).

Temperature

Alto Parnaíba marks the start of January with an average high-temperature of a still tropical 30.2°C (86.4°F), hinting at a slight fluctuation from December's 31.5°C (88.7°F). Alto Parnaíba encounters an average low-temperature of 21.4°C (70.5°F) during January nights.

Heat index

Throughout January, the heat index is evaluated at a very hot 39°C (102.2°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The average relative humidity in January is 81%.

Rainfall

January is the month with the most rainfall in Alto Parnaíba, Brazil. Rain falls for 26.2 days and accumulates 133mm (5.24") of precipitation.

Daylight

In January, the average length of the day is 12h and 35min.
On the first day of the month, sunrise is at 05:47 and sunset at 18:26. On the last day of January, sunrise is at 06:01 and sunset at 18:32 -03.

Sunshine

In January, the average sunshine in Alto Parnaíba is 8h.

UV index

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Alto Parnaíba, Brazil. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 6 in January translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.