December weather forecast
Guarantã, Brazil

The first month of the summer, December, is still a warm month in Guarantã, Brazil, with an average temperature ranging between min 21.1°C (70°F) and max 29.8°C (85.6°F).

Temperature

December records an average high-temperature of a still moderately hot 29.8°C (85.6°F), indicating a minor variation from the preceding month. Nighttime temperature lowers to an average of 21.1°C (70°F) in December.

Heat index

The heat index for December is evaluated at a fiery hot 37°C (98.6°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In December, the average relative humidity is 79%.

Rainfall

In Guarantã, in December, during 26.4 rainfall days, 175mm (6.89") of precipitation is typically accumulated. In Guarantã, Brazil, during the entire year, the rain falls for 195.6 days and collects up to 1139mm (44.84") 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 December, sunrise is at 05:26 and sunset at 18:48. On the last day of the month, sunrise is at 05:38 and sunset at 19:05 -03.

Sunshine

In December, the average sunshine in Guarantã is 7.7h.

UV index

The months with the highest UV index in Guarantã are January through April, July through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.