December weather forecast
Posadas, Argentina

The first month of the summer, December, is a tropical month in Posadas, Argentina, with an average temperature ranging between min 20°C (68°F) and max 31.7°C (89.1°F).

Temperature

In Posadas, the average high-temperature in December is essentially the same as in November - a tropical 31.7°C (89.1°F). In Posadas, in December, the average low-temperature is 20°C (68°F).

Heat index

In December, the average heat index is estimated at an extremely hot 40°C (104°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, wind, pregnancy). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

December is the least humid month, with an average relative humidity of 72%.

Rainfall

In December, the rain falls for 15.3 days. Throughout December, 91mm (3.58") of precipitation is accumulated. Throughout the year, there are 152.6 rainfall days, and 981mm (38.62") of precipitation is accumulated.

Daylight

With an average of 13h and 50min of daylight, December has the longest days of the year in Posadas.
On the first day of December, sunrise is at 05:40 and sunset at 19:24. On the last day of the month, sunrise is at 05:51 and sunset at 19:41 -03.

Sunshine

The average sunshine in December in Posadas is 10.1h.

UV index

The average daily maximum UV index in December in Posadas is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 6 in December interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.