December weather forecast
Selva, Argentina

December, the first month of the summer in Selva, is still a hot month, with an average temperature fluctuating between 33.1°C (91.6°F) and 20°C (68°F).

Temperature

December's average high-temperature stands at a still hot 33.1°C (91.6°F), showing little deviation from November's 30.4°C (86.7°F). During December, Selva perceives a consistent contrast from the daytime highs, with an average low-temperature of 20°C (68°F).

Heat index

The heat index in December is evaluated at a sweltering 37°C (98.6°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The average relative humidity in December is 53%.

Rainfall

In Selva, during December, the rain falls for 10.8 days and regularly aggregates up to 60mm (2.36") of precipitation. Throughout the year, there are 102.1 rainfall days, and 528mm (20.79") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 05:59 and sunset at 19:55. On the last day of December, sunrise is at 06:10 and sunset at 20:12 -03.

Sunshine

With an average of 9.4h of sunshine, December has the most sunshine of the year in Selva.

UV index

The months with the highest UV index are January, February and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: In December, the maximum UV index of 7 suggests this advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Tightly woven clothing, when worn loosely, shields effectively against the Sun.