December weather forecast
Rio Crespo, Brazil

The first month of the summer, December, is still a warm month in Rio Crespo, Brazil, with temperature in the range of an average low of 22.4°C (72.3°F) and an average high of 29.8°C (85.6°F).

Temperature

The arrival of December denotes a barely perceptible change in the average high-temperatures to a moderately hot 29.8°C (85.6°F) from November's 31.7°C (89.1°F). Rio Crespo encounters a steady low-temperature average of 22.4°C (72.3°F) throughout the month of December.

Heat index

In December, the average heat index is calculated to be a fiery hot 39°C (102.2°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance 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.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in December in Rio Crespo is 88%.

Rainfall

In Rio Crespo, in December, during 28.6 rainfall days, 197mm (7.76") of precipitation is typically accumulated. In Rio Crespo, during the entire year, the rain falls for 239.4 days and collects up to 1466mm (57.72") of precipitation.

Daylight

With an average of 12h and 42min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:41 and sunset at 18:20. On the last day of December, sunrise is at 05:54 and sunset at 18:35 -04.

Sunshine

In December, the average sunshine is 6.6h.

UV index

The average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 6 during December translates into the following directions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.