December weather forecast
Breves, Brazil

The first month of the summer, December, is also a hot month in Breves, Brazil, with temperature in the range of an average low of 22.9°C (73.2°F) and an average high of 32.8°C (91°F).

Temperature

The onset of December marks an average high-temperature of a still tropical 32.8°C (91°F), hardly differing from November's 34.7°C (94.5°F). An average temperature of 22.9°C (73.2°F) marks the nights in December.

Heat index

December's heat index is appraised at a blazing hot 47°C (116.6°F). Be cautious: Heat exhaustion along with heat cramps are predicted. Heatstroke is a possible consequence of continuous physical effort.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Breves, the average relative humidity in December is 79%.

Rainfall

In Breves, in December, it is raining for 25.5 days, with typically 140mm (5.51") of accumulated precipitation. In Breves, during the entire year, the rain falls for 282.9 days and collects up to 1449mm (57.05") of precipitation.

Daylight

With an average of 12h and 12min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 06:04 and sunset at 18:17. On the last day of the month, sunrise is at 06:18 and sunset at 18:31 -03.

Sunshine

In Breves, the average sunshine in December is 6.9h.

UV index

The months with the lowest UV index are January through April and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: An average maximum UV index of 6 in December leads to these recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.