December weather forecast
Neópolis, Brazil

The first month of the summer, December, is also a hot month in Neópolis, Brazil, with temperature in the range of an average high of 31.2°C (88.2°F) and an average low of 23.4°C (74.1°F).

Temperature

November's transformation into December witnesses an average high-temperature of a still tropical 31.2°C (88.2°F), noting a minor change from the preceding month. Throughout the month of December, the nighttime temperature in Neópolis, Brazil, dips to an average of 23.4°C (74.1°F).

Heat index

The heat index in December is estimated at a torrid 38°C (100.4°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Factoring in the heat index, values are geared towards shaded areas with light breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

With an average relative humidity of 71%, December is the least humid month.

Rainfall

In Neópolis, Brazil, during December, the rain falls for 11.9 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, there are 222.9 rainfall days, and 509mm (20.04") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 42min of daylight.
On the first day of December, sunrise is at 04:55 and sunset at 17:36. On the last day of the month, sunrise is at 05:08 and sunset at 17:51 -03.

Sunshine

The average sunshine in December is 8.3h.

UV index

The months with the highest UV index are January through March, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In December, the maximum UV index of 7 suggests this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.