December weather forecast
Bom Retiro do Sul, Brazil

The first month of the summer, December, is still a warm month in Bom Retiro do Sul, Brazil, with temperature in the range of an average high of 29.2°C (84.6°F) and an average low of 17.5°C (63.5°F).

Temperature

December's arrival brings an average high-temperature of a still warm 29.2°C (84.6°F), slightly deviating from November's 26.5°C (79.7°F). During December, the temperature in Bom Retiro do Sul, Brazil, tends to dip to an average of 17.5°C (63.5°F) at night.

Heat index

The heat index value for December is appraised at a torrid 35°C (95°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical 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.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

With an average relative humidity of 77%, December is the least humid month in Bom Retiro do Sul, Brazil.

Rainfall

In Bom Retiro do Sul, Brazil, in December, during 16.5 rainfall days, 70mm (2.76") of precipitation is typically accumulated. Throughout the year, in Bom Retiro do Sul, Brazil, there are 169.4 rainfall days, and 977mm (38.46") of precipitation is accumulated.

Daylight

With an average of 14h and 0min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:19 and sunset at 19:14. On the last day of December, sunrise is at 05:30 and sunset at 19:31 -03.

Sunshine

With an average of 8.5h of sunshine, December has the most sunshine of the year in Bom Retiro do Sul.

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index in Bom Retiro do Sul. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 6 during December leads to these instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.