January weather forecast
Bom Retiro do Sul, Brazil

January, the same as December, is a moderately hot summer month in Bom Retiro do Sul, Brazil, with an average temperature varying between 18.5°C (65.3°F) and 29.5°C (85.1°F).

Temperature

Bom Retiro do Sul's entry into January measures an average high-temperature of a still warm 29.5°C (85.1°F), closely parallel to the preceding month. In Bom Retiro do Sul, January nights cool down to an average of 18.5°C (65.3°F).

Heat index

For January, the heat index is appraised at a fiery hot 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The average relative humidity in January is 79%.

Rainfall

In Bom Retiro do Sul, in January, it is raining for 18.6 days, with typically 91mm (3.58") of accumulated precipitation. In Bom Retiro do Sul, Brazil, during the entire year, the rain falls for 169.4 days and collects up to 977mm (38.46") of precipitation.

Daylight

In Bom Retiro do Sul, the average length of the day in January is 13h and 47min.
On the first day of January, sunrise is at 05:30 and sunset at 19:31. On the last day of the month, sunrise is at 05:55 and sunset at 19:26 -03.

Sunshine

The average sunshine in January is 8.4h.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In January, the maximum UV index of 6 transforms into these recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.