December weather forecast
San Bernardino, Paraguay

December, the first month of the summer in San Bernardino, is also a hot month, with an average temperature varying between 33°C (91.4°F) and 22.3°C (72.1°F).

Temperature

December commences with an average high-temperature of a still hot 33°C (91.4°F), showing little deviation from November's 31.4°C (88.5°F). In the month of December, San Bernardino experiences an average low-temperature of 22.3°C (72.1°F).

Heat index

Throughout December, the heat index is computed to be a scorching 43°C (109.4°F). Remain cautious: Heat cramps along with heat exhaustion are foreseeable. Ongoing activity may precipitate heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In San Bernardino, the average relative humidity in December is 69%.

Rainfall

In December, the rain falls for 15.5 days. Throughout December, 104mm (4.09") of precipitation is accumulated. Throughout the year, in San Bernardino, there are 153.2 rainfall days, and 865mm (34.06") of precipitation is accumulated.

Daylight

The month with the longest days in San Bernardino is December, with an average of 13h and 42min of daylight.
On the first day of the month, sunrise is at 05:50 and sunset at 19:26. On the last day of December, in San Bernardino, sunrise is at 06:01 and sunset at 19:43 -03.

Sunshine

In San Bernardino, the average sunshine in December is 10.4h.

UV index

January, February, October 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 unsafe exposure to UV radiation for the ordinary person.
Note: In December, a daily maximum UV index of 7 leads to the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Enhance your sun protection with tightly woven, yet airy clothing.