December weather forecastMari, Brazil

Weather in December

December, the first month of the summer in Mari, is still a tropical month, with an average temperature fluctuating between 30.9°C (87.6°F) and 23.6°C (74.5°F).

Temperature

As December unfolds, the average high-temperature reaches a still hot 30.9°C (87.6°F), hinting at a slight fluctuation from the previous month. Mari's temperature in December lowers to a consistent average of 23.6°C (74.5°F) during the nights.

Heat index

The average heat index in December is appraised at a torrid 38°C (100.4°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In Mari, the average relative humidity in December is 72%.

Rainfall

In December, the rain falls for 16.4 days. Throughout December, 19mm (0.75") of precipitation is accumulated. Throughout the year, in Mari, there are 217.5 rainfall days, and 510mm (20.08") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of December, sunrise is at 04:55 and sunset at 17:25. On the last day of the month, sunrise is at 05:08 and sunset at 17:40 -03.

Sunshine

The average sunshine in December in Mari is 7.3h.

UV index

March through September and December, with an average maximum UV index of 6, are months with the lowest UV index in Mari, Brazil. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 6 transforms into these recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.