January weather forecast
Alcântara, Brazil

January, like December, in Alcântara, Brazil, is a moderately hot summer month, with temperature in the range of an average low of 25.1°C (77.2°F) and an average high of 29.7°C (85.5°F).

Temperature

January records an average high-temperature of a warm 29.7°C (85.5°F), indicating a minor variation from the preceding month. Throughout January, a minimal difference from peak daytime temperatures is noted, marking a steady low-temperature average of 25.1°C (77.2°F).

Heat index

In January, the average heat index is estimated at a very hot 37°C (98.6°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in January is 80%.

Rainfall

In Alcântara, during January, the rain falls for 29.3 days and regularly aggregates up to 285mm (11.22") of precipitation. In Alcântara, during the entire year, the rain falls for 291.1 days and collects up to 2596mm (102.2") of precipitation.

Sea temperature

In January, the average sea temperature in Alcântara is 28.6°C (83.5°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In Alcântara, the average length of the day in January is 12h and 14min.
On the first day of the month, sunrise is at 05:53 and sunset at 18:08. On the last day of January, sunrise is at 06:04 and sunset at 18:17 -03.

Sunshine

In January, the average sunshine is 8.5h.

UV index

The months with the lowest UV index in Alcântara are January through March, May and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, an average UV index of 6 transforms into the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Watch out! Reflections from sand and water can surge UV radiation exposure.