December weather forecast
Santo Tomé, Argentina

December, the first month of the summer in Santo Tomé, is a hot month, with an average temperature fluctuating between 31.8°C (89.2°F) and 18.5°C (65.3°F).

Temperature

In December, Santo Tomé's weather conditions record an average high-temperature of a hot 31.8°C (89.2°F), demonstrating little divergence from the preceding month. A striking departure from daytime highs to an average low-temperature of 18.5°C (65.3°F) is witnessed in Santo Tomé during December.

Heat index

For most parts of December, the heat index is calculated to be a fiery hot 35°C (95°F). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. 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', is a numerical representation of warmth when taking temperature and moisture levels into account. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Santo Tomé, the average relative humidity in December is 56%.

Rainfall

In Santo Tomé, in December, it is raining for 9.3 days, with typically 68mm (2.68") of accumulated precipitation. In Santo Tomé, Argentina, during the entire year, the rain falls for 101.4 days and collects up to 542mm (21.34") of precipitation.

Daylight

With an average of 14h and 12min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:50 and sunset at 19:54. On the last day of December, in Santo Tomé, sunrise is at 06:01 and sunset at 20:11 -03.

Sunshine

December has the most sunshine of the year in Santo Tomé, with an average of 11.1h of sunshine.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index in Santo Tomé, Argentina. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 7 suggests this advice:
Guard oneself from overexposure. Defence against sun injury is vital. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.