December weather forecastJaú, Brazil

Weather in December

The first month of the summer, December, is also a moderately hot month in Jaú, Brazil, with an average temperature ranging between max 29.2°C (84.6°F) and min 19.7°C (67.5°F).

Temperature

Jaú records an average high-temperature of a still moderately hot 29.2°C (84.6°F) as December arrives, nearly mirroring the previous month's climate. Jaú's average low-temperature for the month of December records at a comfortable 19.7°C (67.5°F).

Heat index

The heat index in December is appraised at a sweltering 35°C (95°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Understand that the heat index values take into account shaded locations and mild winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. 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.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In December, the average relative humidity is 80%.

Rainfall

In Jaú, in December, during 25.5 rainfall days, 161mm (6.34") of precipitation is typically accumulated. Throughout the year, in Jaú, Brazil, there are 192.9 rainfall days, and 1119mm (44.06") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 13h and 30min of daylight.
On the first day of the month, sunrise is at 05:21 and sunset at 18:45. On the last day of December, sunrise is at 05:33 and sunset at 19:01 -03.

Sunshine

In December, the average sunshine is 7.9h.

UV index

The months with the highest UV index in Jaú are January, March, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 6 during December translates into the following guidance:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.