December weather forecast
Puerto Siles, Bolivia

December, the first month of the summer in Puerto Siles, is also a hot month, with an average temperature ranging between max 30.6°C (87.1°F) and min 23°C (73.4°F).

Temperature

December's onset records an average high-temperature of a still hot 30.6°C (87.1°F), a near match to November's 32°C (89.6°F). An average minimum temperature of 23°C (73.4°F) is recorded during the month of December.

Heat index

The heat index value for December is computed to be a blistering 40°C (104°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. 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 largely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The average relative humidity in December in Puerto Siles is 81%.

Rainfall

In December, in Puerto Siles, the rain falls for 27.2 days. Throughout December, 174mm (6.85") of precipitation is accumulated. Throughout the year, there are 215.7 rainfall days, and 1318mm (51.89") of precipitation is accumulated.

Daylight

With an average of 12h and 54min of daylight, December has the longest days of the year.
On the first day of December in Puerto Siles, sunrise is at 05:44 and sunset at 18:34. On the last day of the month, sunrise is at 05:57 and sunset at 18:49 -04.

Sunshine

In December, the average sunshine is 8.1h.

UV index

In Puerto Siles, the average daily maximum UV index in December is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.