December weather forecast
Itaituba, Brazil

The first month of the summer, December, is still a hot month in Itaituba, Brazil, with an average temperature fluctuating between 32.4°C (90.3°F) and 22.7°C (72.9°F).

Temperature

Upon the beginning of December, Itaituba's high-temperatures register at a still hot 32.4°C (90.3°F), closely mirroring the preceding month. Itaituba, in the month of December, anticipates a consistent average low-temperature of 22.7°C (72.9°F).

Heat index

The heat index value during December is appraised at a life-threatening hot 45°C (113°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. 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 highly important for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In December, the average relative humidity in Itaituba is 79%.

Rainfall

In Itaituba, in December, it is raining for 25.9 days, with typically 133mm (5.24") of accumulated precipitation. In Itaituba, during the entire year, the rain falls for 235.8 days and collects up to 1154mm (45.43") of precipitation.

Daylight

With an average of 12h and 24min of daylight, December has the longest days of the year in Itaituba.
On the first day of the month, sunrise is at 06:22 and sunset at 18:43. On the last day of December, sunrise is at 06:36 and sunset at 18:58 -03.

Sunshine

The average sunshine in December is 7.2h.

UV index

The months with the lowest UV index in Itaituba are January through April and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 6 translates into these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.