December weather forecast
São João do Cariri, Brazil

December, the first month of the summer in São João do Cariri, is also a hot month, with temperature in the range of an average high of 30.7°C (87.3°F) and an average low of 21.3°C (70.3°F).

Temperature

São João do Cariri's December showcases an average high-temperature of a still hot 30.7°C (87.3°F), hardly distinct from November's 30.5°C (86.9°F). An average low-temperature of 21.3°C (70.3°F) is recorded during the nights in December in São João do Cariri.

Heat index

The heat index value for December is calculated to be a sweltering 37°C (98.6°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Metrics for the heat index primarily focus on shaded spots and light 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 'apparent temperature' or 'felt air temperature', is achieved by amalgamating air temperature with the relative humidity readings. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The months with the lowest humidity in São João do Cariri are November and December, with an average relative humidity of 71%.

Rainfall

In São João do Cariri, during December, the rain falls for 15.3 days and regularly aggregates up to 20mm (0.79") of precipitation. Throughout the year, in São João do Cariri, there are 212.6 rainfall days, and 486mm (19.13") of precipitation is accumulated.

Daylight

December has the longest days of the year in São João do Cariri, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 04:59 and sunset at 17:31. On the last day of December, sunrise is at 05:12 and sunset at 17:45 -03.

Sunshine

The average sunshine in December is 6.9h.

UV index

The months with the highest UV index are January through June, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 6 in December leads to these guidelines:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.