December weather forecast
Manari, Brazil

December, the first month of the summer in Manari, is still a hot month, with temperature in the range of an average low of 20.3°C (68.5°F) and an average high of 31.9°C (89.4°F).

Temperature

Manari experiences a transition to a still tropical 31.9°C (89.4°F) in average high-temperatures with the arrival of December, not greatly differing from November's 32.3°C (90.1°F). Throughout December, Manari experiences a low-temperature average of 20.3°C (68.5°F).

Heat index

The average heat index in December is calculated to be a sweltering 37°C (98.6°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In December, the average relative humidity in Manari, Brazil, is 61%.

Rainfall

In Manari, during December, the rain falls for 10.2 days and regularly aggregates up to 36mm (1.42") of precipitation. In Manari, during the entire year, the rain falls for 157.8 days and collects up to 463mm (18.23") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 36min of daylight.
On the first day of December in Manari, Brazil, sunrise is at 05:01 and sunset at 17:38. On the last day of the month, sunrise is at 05:14 and sunset at 17:52 -03.

Sunshine

In Manari, the average sunshine in December is 9.3h.

UV index

February, October through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Fend off overexposure. Sun protection is vital. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.