December weather forecast
Cajati, Brazil

The first month of the summer, December, is a hot month in Cajati, Brazil, with an average temperature ranging between min 19.9°C (67.8°F) and max 30.5°C (86.9°F).

Temperature

The advent of December signifies a minor shift to an average high-temperature of a tropical 30.5°C (86.9°F), aligning closely with November. Cajati throughout December, experiences an average nighttime temperature of 19.9°C (67.8°F).

Heat index

Throughout December, the heat index is computed to be a scorching 40°C (104°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

December is the least humid month in Cajati, with an average relative humidity of 82%.

Rainfall

In Cajati, Brazil, in December, it is raining for 21.9 days, with typically 105mm (4.13") of accumulated precipitation. Throughout the year, there are 210 rainfall days, and 893mm (35.16") of precipitation is accumulated.

Daylight

With an average of 13h and 36min of daylight, December has the longest days of the year in Cajati.
On the first day of the month, sunrise is at 05:14 and sunset at 18:48. On the last day of December, sunrise is at 05:26 and sunset at 19:05 -03.

Sunshine

In December, the average sunshine in Cajati is 6.6h.

UV index

The months with the highest UV index are January through March, October through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 6 in December interprets into the following advice:
Deflect overexposure. Sun protection is a necessity. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.