December weather forecast
Riolândia, Brazil

December, the first month of the summer in Riolândia, is also a hot month, with an average temperature varying between 30°C (86°F) and 21.3°C (70.3°F).

Temperature

With December's advent, Riolândia sees an average high-temperature of a still tropical 30°C (86°F), subtly shifted from November's 30.4°C (86.7°F). Nighttime temperature in Riolândia, Brazil, experiences an average drop to an agreeable 21.3°C (70.3°F) in December.

Heat index

December's average heat index is computed to be a fiery hot 38°C (100.4°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to 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.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in December is 80%.

Rainfall

In Riolândia, during December, the rain falls for 28.9 days and regularly aggregates up to 190mm (7.48") of precipitation. Throughout the year, in Riolândia, there are 206.5 rainfall days, and 1211mm (47.68") of precipitation is accumulated.

Daylight

With an average of 13h and 18min of daylight, December has the longest days of the year in Riolândia, Brazil.
On the first day of December, sunrise is at 05:30 and sunset at 18:45. On the last day of the month, sunrise is at 05:42 and sunset at 19:01 -03.

Sunshine

In December, the average sunshine in Riolândia is 7.6h.

UV index

The average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 during December translates into the following guidance:
Stay clear of intense sun exposure. Solar protection is of utmost significance. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.