January weather forecast
Cataratas del Iguazú, Argentina

Cataratas del Iguazú starts its calendar year with humid weather characterized by contrasts in daily high and low temperatures. January brings notable heat with temperatures ranging from a sweltering high of 31.3°C (88.3°F) to a balmy low of 20.8°C (69.4°F). This month harbours the inception of the year's warmest months while retaining a significant amount of rainfall. Often, the arrival of the new year presents an opportune setting for visitors seeking a tropical atmosphere accompanied by spontaneous rain showers. The abundance of sunshine, along with periods of rain, create a unique yet captivating weather pattern, fascinating tourists and locals alike.

Temperature

Cataratas del Iguazú's temperatures tend to hit their maximum during January and February, with an average high-temperature of 31.3°C (88.3°F).

Heat index

The heat index in January is evaluated at a blistering 42°C (107.6°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

The average relative humidity in January is 79%.

Rainfall

In Cataratas del Iguazú, in January, during 19.1 rainfall days, 108mm (4.25") of precipitation is typically accumulated. In Cataratas del Iguazú, during the entire year, the rain falls for 165.2 days and collects up to 1060mm (41.73") of precipitation.

Daylight

The average length of the day in January in Cataratas del Iguazú is 13h and 32min.
On the first day of January, sunrise is at 05:49 and sunset at 19:32. On the last day of the month, sunrise is at 06:12 and sunset at 19:29 -03.

Sunshine

In January, the average sunshine is 8.6h.

UV index

The month with the highest UV index is January, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 7 in January suggests the following recommendations:
Fend off overexposure. Sun protection is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun.