December weather forecast
Iuiú, Brazil

December, the first month of the summer in Iuiú, is still a warm month, with an average temperature fluctuating between 20.3°C (68.5°F) and 29.7°C (85.5°F).

Temperature

The onset of December brings an average high-temperature of a warm 29.7°C (85.5°F), nearly matching the November temperature. An average low-temperature of 20.3°C (68.5°F) is observed during December nights.

Heat index

During December, the heat index is computed to be a very hot 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in December in Iuiú is 77%.

Rainfall

In Iuiú, during December, the rain falls for 20.4 days and regularly aggregates up to 114mm (4.49") of precipitation. Throughout the year, there are 145.7 rainfall days, and 748mm (29.45") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 13h and 0min of daylight.
On the first day of the month, sunrise is at 05:15 and sunset at 18:11. On the last day of December, in Iuiú, Brazil, sunrise is at 05:28 and sunset at 18:26 -03.

Sunshine

The average sunshine in December is 9.7h.

UV index

January through July, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 6 during December translates into the following directions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.