December weather forecast
Nelson, Argentina

The first month of the summer, December, is a hot month in Nelson, Argentina, with temperature in the range of an average low of 18.3°C (64.9°F) and an average high of 31.7°C (89.1°F).

Temperature

December experiences an average high-temperature of a hot 31.7°C (89.1°F), barely different from November's 29.2°C (84.6°F). A sharp contrast between day and night is prevalent in December with an average nighttime temperature of 18.3°C (64.9°F) in Nelson.

Heat index

The heat index for December is evaluated at a sweltering 35°C (95°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Note that heat index values are valued for light wind and location in the shade. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In December, the average relative humidity in Nelson is 56%.

Rainfall

In Nelson, during December, the rain falls for 9.6 days and regularly aggregates up to 69mm (2.72") of precipitation. Throughout the year, in Nelson, there are 105.9 rainfall days, and 576mm (22.68") of precipitation is accumulated.

Daylight

December has the longest days of the year in Nelson, with an average of 14h and 6min of daylight.
On the first day of December, sunrise is at 05:51 and sunset at 19:53. On the last day of the month, sunrise is at 06:02 and sunset at 20:10 -03.

Sunshine

The month with the most sunshine in Nelson is December, with an average of 11.1h 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 value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 7 during December translates into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.