December weather forecast
Cataratas del Iguazú, Argentina

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Weather in December

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.

Frequently asked questions

How hot is December in Cataratas del Iguazú?

During December, Cataratas del Iguazú experiences an average high-temperature of 31.2°C (88.2°F) and a low-temperature of 20.1°C (68.2°F). In December, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 40°C (104°F).

What is the average humidity in December in Cataratas del Iguazú?

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

How many days does it rain in December in Cataratas del Iguazú?

In Cataratas del Iguazú, in December, during 19.2 rainfall days, 106mm (4.17") of precipitation is typically accumulated.

When are the longest days in Cataratas del Iguazú?

With an average of 13h and 42min of daylight, December has the longest days of the year in Cataratas del Iguazú.

How many hours of daylight does Cataratas del Iguazú have in December?

The average day length in December in Cataratas del Iguazú is 13h and 43min.

What time are sunrise and sunset in December in Cataratas del Iguazú?

On the first day of December in Cataratas del Iguazú, Argentina, sunrise is at 05:38 and sunset at 19:15. On the last day of the month, sunrise is at 05:49 and sunset at 19:32 -03.

What are the months with the most sunshine in Cataratas del Iguazú?

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

How many hours of sunshine does Cataratas del Iguazú have in December?

In December, the average sunshine duration in Cataratas del Iguazú is 8.7h.

What is the UV index reading in December in Cataratas del Iguazú?

In Cataratas del Iguazú, Argentina, the average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in December
Cataratas del Iguazú, Argentina

Average temperature in December - Cataratas del Iguazú, Argentina
  • Average high temperature in December: 31.2°C

The warmest months (with the highest average high temperature) are January and February (31.3°C).
The month with the lowest average high temperature is June (21.2°C).

  • Average low temperature in December: 20.1°C

The month with the highest average low temperature is January (20.8°C).
The coldest month (with the lowest average low temperature) is July (12.3°C).

Average pressure in December
Cataratas del Iguazú, Argentina

Average pressure in December - Cataratas del Iguazú, Argentina
  • Average pressure in December: 1009.4mbar

The month with the highest atmospheric pressure is July (1018mbar).
The month with the lowest atmospheric pressure is December (1009.4mbar).

Average wind speed in December
Cataratas del Iguazú, Argentina

Average wind speed in December - Cataratas del Iguazú, Argentina
  • Average wind speed in December: 7.4km/h

The windiest month (with the highest average wind speed) is August (8.5km/h).
The calmest month (with the lowest average wind speed) is March (6.6km/h).

Average humidity in December
Cataratas del Iguazú, Argentina

Average humidity in December - Cataratas del Iguazú, Argentina
  • Average humidity in December: 77%

The month with the highest relative humidity is June (87%).
The month with the lowest relative humidity is September (74%).

Average rainfall in December
Cataratas del Iguazú, Argentina

Average rainfall in December - Cataratas del Iguazú, Argentina
  • Average rainfall in December: 106mm

The wettest month (with the highest rainfall) is October (125mm).
The driest month (with the least rainfall) is August (47mm).

Average rainfall days in December
Cataratas del Iguazú, Argentina

Average rainfall days in December - Cataratas del Iguazú, Argentina
  • Average rainfall days in December: 19.2 days

The month with the highest number of rainy days is December (19.2 days).
The month with the least rainy days is August (8.9 days).

Average daylight in December /
Average sunshine in December
Cataratas del Iguazú, Argentina

Average daylight in December / Average sunshine in December - Cataratas del Iguazú, Argentina
  • Average daylight in December: 13h and 4min

The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 36min).

  • Average sunshine in December: 8h and 4min

The months with the most sunshine are November and December (Average sunshine: 8h and 42min).
The month with the least sunshine is June (Average sunshine: 7h and 6min).

Average sunshine days in December
Cataratas del Iguazú, Argentina

Average sunshine days in December - Cataratas del Iguazú, Argentina
  • Average sunshine days in December: 9.6 days

The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is February (7.8 days).

Average UV index in December
Cataratas del Iguazú, Argentina

Average UV index in December - Cataratas del Iguazú, Argentina
  • Average UV index in December: 6

The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are May and June (UV index 4).

Average cloud cover in December
Cataratas del Iguazú, Argentina

Average cloud cover in December - Cataratas del Iguazú, Argentina
  • Average cloud cover in December: 35

The month with the most cloud cover is May (Cloud cover 47).
The months with the least cloud cover are August and September (Cloud cover 29).

Average visibility in December
Cataratas del Iguazú, Argentina

Average visibility in December - Cataratas del Iguazú, Argentina
  • Average visibility in December: 8km

The month with the highest visibility is September (9km).
The months with the lowest visibility are May, June and July (7km).

Cataratas del Iguazú, Argentina

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