December weather forecast
San Borja, Bolivia

December wraps up the year in San Borja, Bolivia, by reinstating its characteristic rainfall. The weather is marked by a gradual increase in rain, a distinctive trait of San Borja's climatic pattern. The city, basking in December's rains, embraces the thriving lushness around it. As the days progress, the weather pattern underlines the continuous interplay of dry and wet seasons. December's downpours prepare the city to commence another cycle of seasonal fluctuations.

Temperature

December's average high-temperature in San Borja, Bolivia, is a warm 29.9°C (85.8°F), maintaining a close comparison with November's 30.9°C (87.6°F). Throughout December nights, San Borja experiences a consistent temperature average of 21°C (69.8°F).

Heat index

The average heat index in December is estimated at a fiery hot 39°C (102.2°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In San Borja, Bolivia, the average relative humidity in December is 84%.

Rainfall

The month with the most rainfall in San Borja is December, when the rain falls for 28.1 days and typically aggregates up to 414mm (16.3") of precipitation.

Daylight

December has the longest days of the year, with an average of 13h and 0min of daylight.
On the first day of December, sunrise is at 05:47 and sunset at 18:44. On the last day of the month, sunrise is at 06:00 and sunset at 19:00 -04.

Sunshine

In December, the average sunshine is 7.1h.

UV index

January, March, April, June through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In December, a regular UV index of 6 translates into these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.