December weather forecast
Cataratas del Iguazú, Argentina

Closing the calendar year, December returns to the high temperature trend with increased rainfall. Despite this return to warm and humid conditions, Cataratas del Iguazú continues to attract a significant volume of tourists. The high pressure throughout the month contributes to a stable and predictable climate pattern. The combination of heat and rainfall heightens the city's tropical feel, making December an appealing month for holidaymakers seeking a warm-weather getaway.

Temperature

December's weather records an average high-temperature of a still hot 31.2°C (88.2°F), showing little deviation from November. Cataratas del Iguazú reports an average low-temperature of 20.1°C (68.2°F) during the nights of December.

Heat index

During December, the heat index is evaluated at a blistering 40°C (104°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. 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 'feels like' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Cataratas del Iguazú, the average relative humidity in December is 77%.

Rainfall

In December, in Cataratas del Iguazú, Argentina, the rain falls for 19.2 days. Throughout December, 106mm (4.17") of precipitation is accumulated. Throughout the year, in Cataratas del Iguazú, there are 165.2 rainfall days, and 1060mm (41.73") of precipitation is accumulated.

Daylight

With an average of 13h and 42min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:38 and sunset at 19:15. On the last day of December, in Cataratas del Iguazú, Argentina, sunrise is at 05:49 and sunset at 19:32 -03.

Sunshine

The months with the most sunshine in Cataratas del Iguazú are November and December, with an average of 8.7h of sunshine.

UV index

In December, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 6 transforms into these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. 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. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.