January weather forecast
Vassouras, Brazil

January, like December, in Vassouras, Brazil, is another warm summer month, with an average temperature ranging between min 19.5°C (67.1°F) and max 29.2°C (84.6°F).

Temperature

Vassouras's average high-temperature in January is a still moderately hot 29.2°C (84.6°F), marking an insignificant difference from the 28.9°C (84°F) of December. In Vassouras, the January nights cool down to an average low of 19.5°C (67.1°F).

Heat index

The heat index for January is appraised at a fiery hot 37°C (98.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. 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

In Vassouras, the average relative humidity in January is 86%.

Rainfall

The month with the most rainfall is January, when the rain falls for 25.5 days and typically aggregates up to 166mm (6.54") of precipitation.

Daylight

In January, the average length of the day is 13h and 19min.
On the first day of January, sunrise is at 05:13 and sunset at 18:42. On the last day of the month, sunrise is at 05:34 and sunset at 18:41 -03.

Sunshine

The average sunshine in January in Vassouras is 7.8h.

UV index

January through March, October and December, with an average maximum UV index of 6, are months with the highest UV index in Vassouras. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 6 during January morphs into the following directions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.