December weather forecast
São Miguel das Missões, Brazil

The first month of the summer, December, is still a warm month in São Miguel das Missões, Brazil, with an average temperature fluctuating between 29.9°C (85.8°F) and 19.1°C (66.4°F).

Temperature

December's arrival brings an average high-temperature of a still warm 29.9°C (85.8°F), demonstrating subtle variation from the preceding month. São Miguel das Missões's temperature lowers to a mean of 19.1°C (66.4°F) during the nights in December.

Heat index

Throughout December, the heat index is computed to be a fiery hot 36°C (96.8°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold great significance to children. 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.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

November and December, with an average relative humidity of 73%, are the least humid months in São Miguel das Missões.

Rainfall

In São Miguel das Missões, Brazil, during December, the rain falls for 17.5 days and regularly aggregates up to 106mm (4.17") of precipitation. In São Miguel das Missões, Brazil, during the entire year, the rain falls for 172.6 days and collects up to 1179mm (46.42") of precipitation.

Daylight

With an average of 13h and 54min of daylight, December has the longest days of the year in São Miguel das Missões.
On the first day of December in São Miguel das Missões, Brazil, sunrise is at 05:32 and sunset at 19:22. On the last day of the month, sunrise is at 05:43 and sunset at 19:39 -03.

Sunshine

The months with the most sunshine in São Miguel das Missões are January, November and December, with an average of 8.8h of sunshine.

UV index

January through March, October through December, with an average maximum UV index of 6, are months with the highest UV index in São Miguel das Missões. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 6 in December transforms into the following instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.