December weather forecast
Santana do Matos, Brazil

The first month of the summer, December, is still a tropical month in Santana do Matos, Brazil, with an average temperature fluctuating between 32.2°C (90°F) and 21.8°C (71.2°F).

Temperature

Santana do Matos experiences an average high-temperature of a still tropical 32.2°C (90°F) in December, subtly different from November's 32.3°C (90.1°F). In December, the recorded average low-temperature is a pleasant 21.8°C (71.2°F).

Heat index

In December, the heat index is evaluated at a fiery hot 39°C (102.2°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', determines the feeling of heat when you account for the relative humidity. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In Santana do Matos, the average relative humidity in December is 63%.

Rainfall

In December, in Santana do Matos, the rain falls for 8 days. Throughout December, 14mm (0.55") of precipitation is accumulated. Throughout the year, in Santana do Matos, there are 139.1 rainfall days, and 485mm (19.09") of precipitation is accumulated.

Daylight

December has the longest days of the year in Santana do Matos, with an average of 12h and 30min of daylight.
On the first day of December in Santana do Matos, sunrise is at 05:02 and sunset at 17:29. On the last day of the month, sunrise is at 05:16 and sunset at 17:43 -03.

Sunshine

In December, the average sunshine in Santana do Matos is 8.8h.

UV index

The months with the highest UV index in Santana do Matos are January through March, September through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 7 translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.