December weather forecast
Riberalta, Bolivia

Finally, Riberalta concludes the year with a full immersion into the wet season in December. With little change in temperatures, the city experiences a further increase in rainfall, rounding up to 167mm (6.57"). The sky's frequent grayness due to elevated cloud cover confirms the boisterous reign of the monsoon. By the year's end, Riberalta re-echoes its early-year weather patterns, drawing a climatic full circle with its warm, wet weather.

Temperature

The beginning of December in Riberalta records an average high-temperature of a still hot 30.7°C (87.3°F), almost echoing the conditions of the previous month. Riberalta encounters a steady low-temperature average of 22.6°C (72.7°F) throughout the month of December.

Heat index

For most parts of December, the heat index is computed to be an extremely hot 42°C (107.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The average relative humidity in December is 85%.

Rainfall

In December, in Riberalta, the rain falls for 27.8 days. Throughout December, 167mm (6.57") of precipitation is accumulated. In Riberalta, Bolivia, during the entire year, the rain falls for 224 days and collects up to 1199mm (47.2") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 48min of daylight.
On the first day of December, sunrise is at 05:51 and sunset at 18:35. On the last day of the month, sunrise is at 06:04 and sunset at 18:50 -04.

Sunshine

The average sunshine in December in Riberalta is 7h.

UV index

The months with the lowest UV index are January through June and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Avert overexposure. Light-skinned people might experience burning 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. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.