December weather forecast
Cobija, Bolivia

December marks the peak of the rainy season in Cobija, with rainfall totaling up to 156mm (6.14"), closely copying November's precipitation levels. As the last month of the year, December continues the trend of encompassing high humidity levels, while moderately warm temperatures persist. Despite the intensities of rainfall, the visibility remains stable at 7km (4.3mi). With cloud cover reaching 59%, sunshine hours and daylight availability dwindle. As citizens bid farewell to the year, December's weather manifests as an epitome of the city's typical climatic pattern, exhibiting warmth and high rainfall.

Temperature

The introduction of December notes a subtle temperature variation to a still tropical 30°C (86°F) from November's 31.7°C (89.1°F). In December, the nighttime temperature lowers to an average of 21.9°C (71.4°F).

Heat index

Throughout December, the heat index is computed to be a torrid 39°C (102.2°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

In December, the average relative humidity is 84%.

Rainfall

In December, the rain falls for 28.4 days. Throughout December, 156mm (6.14") of precipitation is accumulated. In Cobija, during the entire year, the rain falls for 253 days and collects up to 1428mm (56.22") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 48min of daylight.
On the first day of the month, sunrise is at 06:02 and sunset at 18:46. On the last day of December, sunrise is at 06:15 and sunset at 19:01 -04.

Sunshine

The average sunshine in December in Cobija is 6.6h.

UV index

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 6 during December translates into these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.