December weather forecast
Missão Velha, Brazil

December, the first month of the summer in Missão Velha, is still a tropical month, with temperature in the range of an average low of 21.5°C (70.7°F) and an average high of 31.7°C (89.1°F).

Temperature

Shifting into December, Missão Velha records an average high-temperature of a still hot 31.7°C (89.1°F), presenting minor fluctuations compared to the previous month. During December nights, Missão Velha records an average temperature of 21.5°C (70.7°F).

Heat index

In December, the heat index is estimated at a very hot 36°C (96.8°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in December is 58%.

Rainfall

In Missão Velha, in December, during 14.8 rainfall days, 63mm (2.48") of precipitation is typically accumulated. In Missão Velha, during the entire year, the rain falls for 162.1 days and collects up to 652mm (25.67") of precipitation.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:10 and sunset at 17:41. On the last day of the month, sunrise is at 05:23 and sunset at 17:55 -03.

Sunshine

In December, the average sunshine is 8.3h.

UV index

January through August and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 6 during December leads to these advisories:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime 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. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.