December weather forecast
Alta Floresta, Brazil

December, the first month of the summer in Alta Floresta, is still a warm month, with an average temperature fluctuating between 21.2°C (70.2°F) and 29.4°C (84.9°F).

Temperature

An average high-temperature of a warm 29.4°C (84.9°F) marks December, exhibiting a close resemblance to the conditions in November. Throughout December, Alta Floresta encounters an average temperature drop to an agreeable 21.2°C (70.2°F).

Heat index

The heat index value for December is evaluated at a sweltering 38°C (100.4°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are largely significant for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. 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. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Alta Floresta, Brazil, the average relative humidity in December is 89%.

Rainfall

In December, the rain falls for 29.8 days. Throughout December, 254mm (10") of precipitation is accumulated. Throughout the year, there are 233.7 rainfall days, and 1653mm (65.08") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 42min of daylight.
On the first day of the month, sunrise is at 05:13 and sunset at 17:53. On the last day of December, sunrise is at 05:26 and sunset at 18:08 -04.

Sunshine

In December, the average sunshine is 6.5h.

UV index

In Alta Floresta, the average daily maximum UV index in December is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 6 during December leads to these instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.