December weather forecast
Ariranha, Brazil

December, the first month of the summer in Ariranha, is still a warm month, with an average temperature fluctuating between 21°C (69.8°F) and 29.4°C (84.9°F).

Temperature

As December unfolds, the average high-temperature reaches a still moderately hot 29.4°C (84.9°F), hinting at a slight fluctuation from the previous month. The low-temperature average for Ariranha during December stands at an agreeable 21°C (69.8°F).

Heat index

December's mean heat index is computed to be a fiery hot 36°C (96.8°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Understanding the heat index involves considering values for shaded locales with light wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

The average relative humidity in December is 80%.

Rainfall

In Ariranha, during December, the rain falls for 27.7 days and regularly aggregates up to 183mm (7.2") of precipitation. Throughout the year, there are 204.1 rainfall days, and 1207mm (47.52") of precipitation is accumulated.

Daylight

With an average of 13h and 24min of daylight, December has the longest days of the year in Ariranha.
On the first day of December in Ariranha, sunrise is at 05:24 and sunset at 18:44. On the last day of the month, sunrise is at 05:36 and sunset at 19:00 -03.

Sunshine

In December, the average sunshine in Ariranha, Brazil, is 7.6h.

UV index

The months with the highest UV index in Ariranha are January through April, June through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high daily UV index of 6 during December translates into the following directions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.