December weather forecast
Cassilândia, Brazil

The first month of the summer, December, is also a hot month in Cassilândia, Brazil, with an average temperature fluctuating between 21.4°C (70.5°F) and 30.1°C (86.2°F).

Temperature

The transition from November to December sees an average high-temperature of a still tropical 30.1°C (86.2°F), indicating a minor variance from the prior month. During the nights in December, Cassilândia experiences a consistent average temperature of 21.4°C (70.5°F).

Heat index

The heat index for December is calculated to be a torrid 38°C (100.4°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. 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 are particularly important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In December, the average relative humidity in Cassilândia, Brazil, is 81%.

Rainfall

In Cassilândia, Brazil, in December, during 27.5 rainfall days, 197mm (7.76") of precipitation is typically accumulated. Throughout the year, in Cassilândia, there are 200.6 rainfall days, and 1186mm (46.69") of precipitation is accumulated.

Daylight

The month with the longest days in Cassilândia is December, with an average of 13h and 18min of daylight.
On the first day of the month, sunrise is at 04:40 and sunset at 17:52. On the last day of December, in Cassilândia, sunrise is at 04:52 and sunset at 18:08 -04.

Sunshine

The average sunshine in December is 9.1h.

UV index

In December, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 6 translates into these guidelines:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.