December weather forecast
Dos Arroyos, Argentina

December, the first month of the summer in Dos Arroyos, is a hot month, with temperature in the range of an average high of 30.3°C (86.5°F) and an average low of 19°C (66.2°F).

Temperature

The advent of December sees the average high-temperature at a hot 30.3°C (86.5°F), subtly shifted from November's 28.7°C (83.7°F). Throughout the month of December, Dos Arroyos expects an average low of 19°C (66.2°F).

Heat index

Throughout December, the heat index is estimated at a sweltering 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. 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 hold great significance to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The least humid month is December, with an average relative humidity of 76%.

Rainfall

In Dos Arroyos, in December, it is raining for 17.5 days, with typically 117mm (4.61") of accumulated precipitation. In Dos Arroyos, during the entire year, the rain falls for 166.5 days and collects up to 1177mm (46.34") of precipitation.

Daylight

December has the longest days of the year, with an average of 13h and 54min of daylight.
On the first day of the month, sunrise is at 05:37 and sunset at 19:23. On the last day of December, sunrise is at 05:48 and sunset at 19:40 -03.

Sunshine

The average sunshine in December is 9.9h.

UV index

January through March, October through December, with an average maximum UV index of 6, 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: The daily high UV index of 6 in December translates into this advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.