December weather forecast
Unión, Paraguay

The first month of the summer, December, is also a hot month in Unión, Paraguay, with an average temperature fluctuating between 31.8°C (89.2°F) and 21.1°C (70°F).

Temperature

The arrival of December coincides with an average high-temperature of a still tropical 31.8°C (89.2°F), indicating a minimal shift from November's 31°C (87.8°F). During December, Unión sees a mean low-temperature of 21.1°C (70°F).

Heat index

The heat index value during December is computed to be a scorching 42°C (107.6°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in December in Unión is 76%.

Rainfall

In December, the rain falls for 20.5 days. Throughout December, 120mm (4.72") of precipitation is accumulated. Throughout the year, there are 166 rainfall days, and 911mm (35.87") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 13h and 36min of daylight.
On the first day of December in Unión, sunrise is at 05:48 and sunset at 19:22. On the last day of the month, sunrise is at 05:59 and sunset at 19:38 -03.

Sunshine

In Unión, the average sunshine in December is 10.3h.

UV index

January and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.