December weather forecast
Igarapé-Miri, Brazil

December, the first month of the summer in Igarapé-Miri, is still a hot month, with temperature in the range of an average low of 23.1°C (73.6°F) and an average high of 32.7°C (90.9°F).

Temperature

With the onset of December, the average high-temperature stands at a still tropical 32.7°C (90.9°F), closely aligned with November's 34.6°C (94.3°F). During the December nights, an average temperature of 23.1°C (73.6°F) is observed in Igarapé-Miri.

Heat index

The average heat index in December is estimated at a burning hot 46°C (114.8°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. 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.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in December is 78%.

Rainfall

In December, in Igarapé-Miri, the rain falls for 16.5 days. Throughout December, 68mm (2.68") of precipitation is accumulated. Throughout the year, there are 195.5 rainfall days, and 766mm (30.16") of precipitation is accumulated.

Daylight

The month with the longest days in Igarapé-Miri is December, with an average of 12h and 12min of daylight.
On the first day of the month, sunrise is at 05:58 and sunset at 18:11. On the last day of December, sunrise is at 06:12 and sunset at 18:26 -03.

Sunshine

The average sunshine in December is 7.6h.

UV index

January, April and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 6 in December leads to these guidelines:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.