December weather forecast
Santa Cruz de la Sierra, Bolivia

Finally, Santa Cruz de la Sierra rounds off the year experiencing the weather extremes of the summer season in December. The average high temperature reaches a peak at 31.4°C (88.5°F), marking this the hottest month of the year. Coupled with high rainfall, December mimics the wet and humid characteristics that mark the beginning of the year. Despite these extremes, the city rejoices in its longest days filled with sunshine, making the month ideal for a holiday vacation.

Temperature

In Santa Cruz de la Sierra, the average temperatures in December are the highest, with a peak at 31.4°C (88.5°F) and a low of 20.9°C (69.6°F).

Heat index

The average heat index in December is estimated at a scorching 41°C (105.8°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in December in Santa Cruz de la Sierra is 77%.

Rainfall

In Santa Cruz de la Sierra, in December, it is raining for 11.9 days, with typically 185mm (7.28") of accumulated precipitation. Throughout the year, in Santa Cruz de la Sierra, Bolivia, there are 111.6 rainfall days, and 1322mm (52.05") of precipitation is accumulated.

Daylight

With an average of 13h and 12min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:28 and sunset at 18:35. On the last day of December, in Santa Cruz de la Sierra, sunrise is at 05:40 and sunset at 18:51 -04.

Sunshine

January through March, May through July and December, with an average of 7h of sunshine, are months with the least sunshine.

UV index

January through March, October through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an excessive health risk from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 12 in December suggests the following recommendations:
Carry out all crucial safety measures, unprotected skin may burn instantly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity.