December weather forecast
Plácido de Castro, Brazil

The first month of the summer, December, is also a hot month in Plácido de Castro, Brazil, with temperature in the range of an average high of 30.1°C (86.2°F) and an average low of 22.3°C (72.1°F).

Temperature

The shift to December signals an average high-temperature of a still tropical 30.1°C (86.2°F), subtly varied from November's 32.2°C (90°F). During December, Plácido de Castro observes a consistent average nighttime temperature of 22.3°C (72.1°F).

Heat index

During December, the heat index is evaluated at a blistering 40°C (104°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In December, the average relative humidity in Plácido de Castro is 87%.

Rainfall

In Plácido de Castro, in December, it is raining for 26.4 days, with typically 180mm (7.09") of accumulated precipitation. Throughout the year, there are 233.4 rainfall days, and 1251mm (49.25") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 42min of daylight.
On the first day of the month, sunrise is at 04:57 and sunset at 17:38. On the last day of December, in Plácido de Castro, Brazil, sunrise is at 05:10 and sunset at 17:53 -05.

Sunshine

In Plácido de Castro, the average sunshine in December is 6.2h.

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 estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In December, a regular UV index of 6 translates into these guidelines:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.