December weather forecast
Guadalupe, Brazil

The first month of the summer, December, is also a moderately hot month in Guadalupe, Brazil, with an average temperature varying between 28.9°C (84°F) and 21.8°C (71.2°F).

Temperature

The average high-temperature during December registers at a still warm 28.9°C (84°F), closely corresponding to the preceding month. An average temperature of 21.8°C (71.2°F) is recorded during the nights in December.

Heat index

The heat index in December is appraised at a fiery hot 35°C (95°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Guadalupe, during December, the rain falls for 23.8 days and regularly aggregates up to 84mm (3.31") of precipitation. In Guadalupe, during the entire year, the rain falls for 205.4 days and collects up to 637mm (25.08") of precipitation.

Daylight

With an average of 13h and 30min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 04:59 and sunset at 18:25. On the last day of December, sunrise is at 05:11 and sunset at 18:42 -03.

Sunshine

In Guadalupe, the average sunshine in December is 7.8h.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 7 in December transforms into this advice:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.