December weather forecast
São Félix do Piauí, Brazil

The first month of the summer, December, is still a hot month in São Félix do Piauí, Brazil, with temperature in the range of an average low of 23.9°C (75°F) and an average high of 33.8°C (92.8°F).

Temperature

December's advent notes a subtle adjustment in average high-temperature to a hot 33.8°C (92.8°F) from November. In the month of December, São Félix do Piauí experiences an average low-temperature of 23.9°C (75°F).

Heat index

December's average heat index is estimated at a blistering 43°C (109.4°F). Stay on guard: Heat exhaustion and heat cramps are predicted. Ongoing effort can cause heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

The average relative humidity in December in São Félix do Piauí is 64%.

Rainfall

In São Félix do Piauí, during December, the rain falls for 20 days and regularly aggregates up to 124mm (4.88") of precipitation. In São Félix do Piauí, Brazil, during the entire year, the rain falls for 220.8 days and collects up to 1560mm (61.42") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of December in São Félix do Piauí, sunrise is at 05:24 and sunset at 17:51. On the last day of the month, sunrise is at 05:37 and sunset at 18:05 -03.

Sunshine

In December, the average sunshine in São Félix do Piauí, Brazil, is 8.4h.

UV index

In São Félix do Piauí, the average daily maximum UV index in December is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 7 during December morphs into the following directions:
Guard against overexposure. Protection from sun-induced harm is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.