December weather forecast
São Salvador do Tocantins, Brazil

The first month of the summer, December, is still a hot month in São Salvador do Tocantins, Brazil, with an average temperature fluctuating between 30.8°C (87.4°F) and 22.1°C (71.8°F).

Temperature

São Salvador do Tocantins measures an average high-temperature of a still hot 30.8°C (87.4°F) in December, nearly consistent with the preceding month. During December, the temperature is averaged to a low of 22.1°C (71.8°F) at night.

Heat index

December's average heat index is evaluated at a scorching 40°C (104°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial 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 has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In December, the average relative humidity in São Salvador do Tocantins is 79%.

Rainfall

In São Salvador do Tocantins, during December, the rain falls for 26.3 days and regularly aggregates up to 145mm (5.71") of precipitation. Throughout the year, in São Salvador do Tocantins, there are 185.7 rainfall days, and 950mm (37.4") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 54min of daylight.
On the first day of December in São Salvador do Tocantins, sunrise is at 05:37 and sunset at 18:26. On the last day of the month, sunrise is at 05:50 and sunset at 18:42 -03.

Sunshine

In São Salvador do Tocantins, the average sunshine in December is 8.7h.

UV index

February through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during December translates into these guidelines:
Take precautions against overexposure. Protection against sun damage is needed. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.