December weather forecast
Nova Iguaçu, Brazil

December brings summertime to Nova Iguaçu, with the climate reaching its annual peak in terms of warmth, and rainfall measuring 134mm (5.28"). The substantial sunlight hours, despite the soaring temperature, create a perfect tropical holiday ambiance. The steadily high humidity levels along with the rising temperatures, narrates a vibrant summer tale. Cooling wind speeds provide a gracious respite from the heat. The city, under the summer sun, wraps up the year maintaining its rich tropical essence.

Temperature

Nova Iguaçu, Brazil, experiences a subtle adjustment in high-temperatures to a still moderately hot 29.3°C (84.7°F) with the onset of December, maintaining near parity with November's 27.2°C (81°F). Nova Iguaçu, during the month of December, experiences an average low-temperature of 21.3°C (70.3°F).

Heat index

In December, the average heat index is appraised at a very hot 36°C (96.8°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In December, the average relative humidity is 82%.

Rainfall

In Nova Iguaçu, during December, the rain falls for 25.7 days and regularly aggregates up to 134mm (5.28") of precipitation. In Nova Iguaçu, during the entire year, the rain falls for 220.6 days and collects up to 991mm (39.02") of precipitation.

Daylight

With an average of 13h and 30min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:00 and sunset at 18:26. On the last day of the month, sunrise is at 05:11 and sunset at 18:42 -03.

Sunshine

In December, the average sunshine in Nova Iguaçu is 7.5h.

UV index

December is the month with the highest UV index, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index, 7 in December, converts into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.