December weather forecastAlvear, Argentina

Weather in December

December, the first month of the summer in Alvear, is a tropical month, with an average temperature ranging between min 19.5°C (67.1°F) and max 31.5°C (88.7°F).

Temperature

The average high-temperature for December is a tropical 31.5°C (88.7°F), closely aligning with the temperature of the preceding month. In stark contrast to the day's heat, the temperature in Alvear dips to an average of 19.5°C (67.1°F) during December nights.

Heat index

The heat index value for December is evaluated at a fiery hot 38°C (100.4°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The months with the lowest humidity are January, March and December, with an average relative humidity of 66%.

Rainfall

In December, the rain falls for 10.4 days. Throughout December, 93mm (3.66") of precipitation is accumulated. In Alvear, during the entire year, the rain falls for 130 days and collects up to 936mm (36.85") of precipitation.

Daylight

December has the longest days of the year, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 05:39 and sunset at 19:31. On the last day of December, in Alvear, sunrise is at 05:50 and sunset at 19:48 -03.

Sunshine

The months with the most sunshine are November and December, with an average of 8.9h of sunshine.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum daily UV index of 7 during December morphs into the following directions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.