January weather forecast
Aracaju, Brazil

The year begins in Aracaju with mild temperatures and clear skies. January enjoys a high average temperature of 30°C (86°F), with pleasant lows of 25°C (77°F). Relative humidity levels this month maintain a comfortable 73%. Locals and tourists alike find this month inviting for outdoor activities, as the weather conditions contribute to a fairly pleasing environment. Sea temperatures also reside at a balmy 27.9°C (82.2°F) fostering enticing beach conditions.

Temperature

Aracaju, Brazil, starts January with an average high-temperature of a still tropical 30°C (86°F), staying steady with the temperature in December. Nights in January in Aracaju exhibit a minor reduction to an average low temperature of 25°C (77°F).

Heat index

For most parts of January, the heat index is computed to be a sweltering 36°C (96.8°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. 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

January through March and December, with an average relative humidity of 73%, are the least humid months.

Rainfall

In Aracaju, in January, during 13 rainfall days, 24mm (0.94") of precipitation is typically accumulated. Throughout the year, there are 197.6 rainfall days, and 586mm (23.07") of precipitation is accumulated.

Sea temperature

In January, the average sea temperature in Aracaju, Brazil, is 27.9°C (82.2°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

The average length of the day in January in Aracaju is 12h and 41min.
On the first day of the month, sunrise is at 05:09 and sunset at 17:54. On the last day of January, in Aracaju, sunrise is at 05:24 and sunset at 17:59 -03.

Sunshine

In Aracaju, the average sunshine in January is 8.3h.

UV index

The months with the highest UV index are January through May, September through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 in January interprets into the following advice:
Shun overexposure. Protection from sun ravages is indispensable. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Heads up! UV intensity is amplified by reflections from water and sand.