December weather forecast
Groaíras, Brazil

The first month of the summer, December, is still a tropical month in Groaíras, Brazil, with temperature in the range of an average high of 33.7°C (92.7°F) and an average low of 24.1°C (75.4°F).

Temperature

With the arrival of December, Groaíras's average high-temperature registers at a tropical 33.7°C (92.7°F), indicating a subtle variation from the previous month. During December, the nighttime temperature averages to a warm 24.1°C (75.4°F).

Heat index

For December, the heat index is computed to be a scorching 43°C (109.4°F). Attention: Heat exhaustion and heat cramps are anticipated. Prolonged effort can result in heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In December, the average relative humidity is 63%.

Rainfall

In December, the rain falls for 14.4 days. Throughout December, 45mm (1.77") of precipitation is accumulated. In Groaíras, during the entire year, the rain falls for 204.6 days and collects up to 1055mm (41.54") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 18min of daylight.
On the first day of December, sunrise is at 05:20 and sunset at 17:40. On the last day of the month, sunrise is at 05:34 and sunset at 17:55 -03.

Sunshine

The average sunshine in December is 7.1h.

UV index

July through December, with an average maximum UV index of 7, are months with the highest UV index in Groaíras. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily maximum UV index of 7 in December translates into the following instructions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.