December weather forecast
Silveira Martins, Brazil

December, the first month of the summer in Silveira Martins, is a hot month, with an average temperature varying between 18°C (64.4°F) and 30.1°C (86.2°F).

Temperature

December's presence records an average high-temperature of a tropical 30.1°C (86.2°F), closely mirroring November's climate. From the height of daytime heat, the temperature in Silveira Martins recedes to an average of 18°C (64.4°F) at night during December.

Heat index

In December, the average heat index is appraised at a sweltering 35°C (95°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The least humid month is December, with an average relative humidity of 70%.

Rainfall

In December, in Silveira Martins, Brazil, the rain falls for 14.2 days. Throughout December, 78mm (3.07") of precipitation is accumulated. In Silveira Martins, Brazil, during the entire year, the rain falls for 146.4 days and collects up to 974mm (38.35") of precipitation.

Daylight

With an average of 14h and 0min of daylight, December has the longest days of the year.
On the first day of December in Silveira Martins, sunrise is at 05:26 and sunset at 19:20. On the last day of the month, sunrise is at 05:37 and sunset at 19:38 -03.

Sunshine

December has the most sunshine of the year in Silveira Martins, with an average of 8.7h of sunshine.

UV index

The average daily maximum UV index in December in Silveira Martins, Brazil, is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 6 transforms into these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.