December weather forecast
Montanhas, Brazil

December, the first month of the summer in Montanhas, is also a hot month, with an average temperature ranging between max 30.5°C (86.9°F) and min 24°C (75.2°F).

Temperature

December denotes a minimal variation in the average high-temperature to a still tropical 30.5°C (86.9°F) from November's 30.3°C (86.5°F). In Montanhas, an average nighttime temperature of 24°C (75.2°F) is expected during December.

Heat index

The average heat index in December is appraised at a fiery hot 37°C (98.6°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. 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 hold particular significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. 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. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

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

Rainfall

In Montanhas, during December, the rain falls for 15.2 days and regularly aggregates up to 18mm (0.71") of precipitation. In Montanhas, Brazil, during the entire year, the rain falls for 199.6 days and collects up to 460mm (18.11") of precipitation.

Daylight

December has the longest days of the year in Montanhas, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 04:56 and sunset at 17:24. On the last day of December, sunrise is at 05:09 and sunset at 17:39 -03.

Sunshine

The average sunshine in December in Montanhas is 7.7h.

UV index

January through March, September through December, with an average maximum UV index of 7, are months with the highest UV index in Montanhas. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.