December weather forecast
Aparecida do Rio Negro, Brazil

The first month of the summer, December, is also a hot month in Aparecida do Rio Negro, Brazil, with an average temperature varying between 22.2°C (72°F) and 31.3°C (88.3°F).

Temperature

Aparecida do Rio Negro's shift into December sets the average high-temperature at a still tropical 31.3°C (88.3°F), a figure that deviates only slightly from November's 32.6°C (90.7°F). December nights in Aparecida do Rio Negro are marked by an average low-temperature of 22.2°C (72°F).

Heat index

For most parts of December, the heat index is appraised at an extremely hot 41°C (105.8°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In December, the average relative humidity in Aparecida do Rio Negro is 78%.

Rainfall

In Aparecida do Rio Negro, in December, it is raining for 25.8 days, with typically 129mm (5.08") of accumulated precipitation. Throughout the year, there are 198 rainfall days, and 907mm (35.71") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 42min of daylight.
On the first day of December in Aparecida do Rio Negro, Brazil, sunrise is at 05:41 and sunset at 18:21. On the last day of the month, sunrise is at 05:54 and sunset at 18:36 -03.

Sunshine

The average sunshine in December in Aparecida do Rio Negro is 9.3h.

UV index

February through May and December, with an average maximum UV index of 6, are months with the lowest UV index in Aparecida do Rio Negro, Brazil. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in December interprets into the following advice:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.