December weather forecast
San Juan Bautista, Paraguay

December, the first month of the summer in San Juan Bautista, is also a hot month, with an average temperature varying between 21.1°C (70°F) and 32.1°C (89.8°F).

Temperature

In December, the average high-temperature is relatively the same as in November - a still tropical 32.1°C (89.8°F). The average low-temperature, in December, is 21.1°C (70°F).

Heat index

The average heat index in December is evaluated at a blistering 41°C (105.8°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values 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 what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like wind, differences in body mass, height, and shape, metabolic differences, and activity influence one's weather impression. 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
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 surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In December, the average relative humidity in San Juan Bautista is 71%.

Rainfall

In San Juan Bautista, during 12.5 rainfall days, 77mm (3.03") of precipitation is typically accumulated. Throughout the year, in San Juan Bautista, there are 130.6 rainfall days, and 683mm (26.89") of precipitation is accumulated.

Daylight

With an average of 13h and 47min of daylight, December has the longest days of the year.
On the first day of December in San Juan Bautista, sunrise is at 05:46 and sunset at 19:28. On the last day of the month, sunrise is at 05:57 and sunset at 19:45 -03.

Sunshine

The average sunshine in December in San Juan Bautista is 10.7h.

UV index

January, February and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in December transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.