January weather forecast
Belém, Brazil

Belém starts the year with a warm and humid climate. January reveals the city's characteristic tropical weather, offering days filled with humidity and copious rainfall. Being only slightly hotter than the previous month of December, which clocks a pleasant balance of heat and rain. Revealing an extreme rainfall of 386mm (15.2"), January presents the city at its wettest phase, helping the lush flora flourish. In contrast, Belém compensates for these rainy days with the charm of its beautiful sunsets making for an immersive tropical vacation experience.

Temperature

The advent of January in Belém, Brazil, presents an average high-temperature of a still hot 30.9°C (87.6°F), maintaining a close correlation with the preceding month. Belém observes an average low-temperature of 22.1°C (71.8°F) during January.

Heat index

The heat index in January is estimated at a blisteringly hot 44°C (111.2°F). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Belém, the average relative humidity in January is 89.7%.

Rainfall

In Belém, during January, the rain falls for 24 days and regularly aggregates up to 386mm (15.2") of precipitation. In Belém, Brazil, during the entire year, the rain falls for 221 days and collects up to 2922mm (115.04") of precipitation.

Sea temperature

With an average sea temperature of 28.6°C (83.5°F), January is the month with the warmest seawater in Belém.
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

In Belém, the average length of the day in January is 12h and 11min.
On the first day of the month, sunrise is at 06:11 and sunset at 18:23. On the last day of January, in Belém, sunrise is at 06:21 and sunset at 18:32 -03.

Sunshine

In Belém, Brazil, the average sunshine in January is 4.5h.

UV index

The months with the highest UV index in Belém are January through May, August through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme threat to health from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 12 in January leads to these guidelines:
Take all critical precautions, unprotected skin might burn swiftly. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Regardless of the cloudiness of the day, a sunscreen with SPF 30 or more should be applied and reapplied generously, specifically after swimming or outdoor exercise. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.