December weather forecast
São Miguel do Iguaçu, Brazil

December, the first month of the summer in São Miguel do Iguaçu, is a hot month, with an average temperature varying between 20.3°C (68.5°F) and 30.5°C (86.9°F).

Temperature

São Miguel do Iguaçu's average high-temperature in December is a tropical 30.5°C (86.9°F), indicating a subtle variation from November. Throughout December, the nighttime temperature in São Miguel do Iguaçu averages to a pleasant 20.3°C (68.5°F).

Heat index

The heat index value during December is estimated at a torrid 39°C (102.2°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In São Miguel do Iguaçu, in December, it is raining for 18.9 days, with typically 99mm (3.9") of accumulated precipitation. In São Miguel do Iguaçu, during the entire year, the rain falls for 165.1 days and collects up to 1005mm (39.57") of precipitation.

Daylight

December has the longest days of the year in São Miguel do Iguaçu, with an average of 13h and 42min of daylight.
On the first day of December in São Miguel do Iguaçu, sunrise is at 05:38 and sunset at 19:14. On the last day of the month, sunrise is at 05:49 and sunset at 19:30 -03.

Sunshine

In São Miguel do Iguaçu, the average sunshine in December is 8.8h.

UV index

The average daily maximum UV index in December in São Miguel do Iguaçu is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: In December, an average UV index of 6 transforms into the following instructions:
Guard oneself from overexposure. Defence against sun injury is vital. 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. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.