December weather forecast
Realengo, Brazil

The first month of the summer, December, is still a warm month in Realengo, Brazil, with an average temperature varying between 23°C (73.4°F) and 29.1°C (84.4°F).

Temperature

Realengo in December witnesses an average high-temperature of a still moderately hot 29.1°C (84.4°F), indicating a slight variation from November's 26.8°C (80.2°F). Realengo's average low-temperature in the month of December is recorded at a still warm 23°C (73.4°F).

Heat index

Throughout December, the heat index is computed to be a sweltering 35°C (95°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Realengo, during December, the rain falls for 18.1 days and regularly aggregates up to 67mm (2.64") of precipitation. Throughout the year, there are 172 rainfall days, and 543mm (21.38") of precipitation is accumulated.

Daylight

December has the longest days of the year in Realengo, with an average of 13h and 30min of daylight.
On the first day of the month, sunrise is at 04:59 and sunset at 18:26. On the last day of December, sunrise is at 05:11 and sunset at 18:42 -03.

Sunshine

In December, the average sunshine in Realengo is 7.9h.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A typical high UV index of 7 in December suggests the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.