January weather forecast
São João de Pirabas, Brazil

January, the same as December, in São João de Pirabas, Brazil, is a hot summer month, with temperature in the range of an average low of 22.6°C (72.7°F) and an average high of 30.6°C (87.1°F).

Temperature

With the advent of January, São João de Pirabas's high-temperatures adjust to a still hot 30.6°C (87.1°F), closely aligning with the preceding month. The temperature in São João de Pirabas dips to an average of 22.6°C (72.7°F) during January nights.

Heat index

During January, the heat index is estimated at a scorching 41°C (105.8°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate 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 'real feel' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. 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.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In January, the average relative humidity is 84%.

Rainfall

In São João de Pirabas, during January, the rain falls for 29.1 days and regularly aggregates up to 151mm (5.94") of precipitation. In São João de Pirabas, during the entire year, the rain falls for 307.3 days and collects up to 1390mm (54.72") of precipitation.

Sea temperature

January, March through May, with an average sea temperature of 28.8°C (83.8°F), are months with the warmest seawater in São João de Pirabas, Brazil.
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

In São João de Pirabas, the average length of the day in January is 12h and 10min.
On the first day of January, sunrise is at 06:07 and sunset at 18:17. On the last day of the month, sunrise is at 06:17 and sunset at 18:26 -03.

Sunshine

The average sunshine in January is 6.4h.

UV index

January through June, August, November and December, with an average maximum UV index of 6, are months with the lowest UV index in São João de Pirabas, Brazil. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum high UV index of 6 in January translates into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Watch out! Reflections from sand and water can surge UV radiation exposure.