December weather forecast
São Fidélis, Brazil

December, the first month of the summer in São Fidélis, is still a warm month, with an average temperature fluctuating between 22.2°C (72°F) and 29.2°C (84.6°F).

Temperature

December's average high-temperature stands at a still warm 29.2°C (84.6°F), showing little deviation from November's 27.7°C (81.9°F). In São Fidélis, in December, the average low-temperature is a pleasant 22.2°C (72°F).

Heat index

The average heat index in December is appraised at a torrid 36°C (96.8°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The most humid month is December, with an average relative humidity of 84%.

Rainfall

In December, in São Fidélis, Brazil, the rain falls for 18.2 days. Throughout December, 112mm (4.41") of precipitation is accumulated. In São Fidélis, during the entire year, the rain falls for 151.4 days and collects up to 609mm (23.98") of precipitation.

Daylight

December has the longest days of the year, with an average of 13h and 24min of daylight.
On the first day of the month, sunrise is at 04:55 and sunset at 18:17. On the last day of December, in São Fidélis, sunrise is at 05:07 and sunset at 18:33 -03.

Sunshine

The average sunshine in December in São Fidélis is 8.6h.

UV index

February through December, with an average maximum UV index of 6, are months with the lowest UV index in São Fidélis. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily high UV index of 6 in December leads to these guidelines:
Shun overexposure. Protection from sun ravages 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.