December weather forecast
Caxias, Brazil

The first month of the summer, December, is still a tropical month in Caxias, Brazil, with an average temperature fluctuating between 23°C (73.4°F) and 33.4°C (92.1°F).

Temperature

The average high-temperature during December is a tropical 33.4°C (92.1°F), almost matching the conditions of the preceding month. Caxias experiences an average low-temperature reading of 23°C (73.4°F) throughout December.

Heat index

For December, the heat index is calculated to be a blazing hot 45°C (113°F). Stay wary: Heat exhaustion and heat cramps are possible. Heatstroke can ensue from extended effort.
For clarity, heat index numbers account for light winds and areas under shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

The average relative humidity in December in Caxias is 71%.

Rainfall

In Caxias, in December, it is raining for 19.4 days, with typically 91mm (3.58") of accumulated precipitation. Throughout the year, there are 209.7 rainfall days, and 1038mm (40.87") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 24min of daylight.
On the first day of the month, sunrise is at 05:31 and sunset at 17:54. On the last day of December, sunrise is at 05:44 and sunset at 18:08 -03.

Sunshine

In Caxias, the average sunshine in December is 8.6h.

UV index

February, March and December, with an average maximum UV index of 6, are months with the lowest UV index in Caxias. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 6 during December translates into these guidelines:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. 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. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.