January weather forecast
São João Nepomuceno, Brazil

January, like December, in São João Nepomuceno, Brazil, is a moderately hot summer month, with an average temperature fluctuating between 19.6°C (67.3°F) and 28.5°C (83.3°F).

Temperature

São João Nepomuceno's shift into January sets the average high-temperature at a still warm 28.5°C (83.3°F), a figure that deviates only slightly from December's 27.9°C (82.2°F). The average nighttime temperature lowers to a comfortable 19.6°C (67.3°F) throughout January.

Heat index

The heat index value for January is appraised at a torrid 35°C (95°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. 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 highly critical to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The average relative humidity in January in São João Nepomuceno is 87%.

Rainfall

In São João Nepomuceno, Brazil, during January, the rain falls for 25 days and regularly aggregates up to 175mm (6.89") of precipitation. Throughout the year, in São João Nepomuceno, there are 226.5 rainfall days, and 1305mm (51.38") of precipitation is accumulated.

Daylight

The average length of the day in January in São João Nepomuceno is 13h and 16min.
On the first day of January in São João Nepomuceno, sunrise is at 05:12 and sunset at 18:38. On the last day of the month, sunrise is at 05:33 and sunset at 18:37 -03.

Sunshine

The average sunshine in January in São João Nepomuceno is 7.8h.

UV index

January, August through October and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 6 in January translates into these instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.