December weather forecast
Monte Caseros, Argentina

The first month of the summer, December, is a tropical month in Monte Caseros, Argentina, with an average temperature varying between 18.7°C (65.7°F) and 31.2°C (88.2°F).

Temperature

December's arrival signals a modest temperature shift, moving from a moderately hot 28.2°C (82.8°F) in November to a hot 31.2°C (88.2°F). The average low-temperature of 18.7°C (65.7°F) in December in Monte Caseros represents a significant drop from the daily high.

Heat index

For December, the heat index is evaluated at a torrid 37°C (98.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Monte Caseros, the average relative humidity in December is 66%.

Rainfall

December is the month with the most rainfall. Rain falls for 12.5 days and accumulates 110mm (4.33") of precipitation.

Daylight

With an average of 14h and 6min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:41 and sunset at 19:38. On the last day of December, sunrise is at 05:51 and sunset at 19:55 -03.

Sunshine

December has the most sunshine of the year, with an average of 10.7h of sunshine.

UV index

The months with the highest UV index in Monte Caseros are January and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 7 in December translates into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. 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.