December weather forecast
Boca do Monte, Brazil

December, the first month of the summer in Boca do Monte, is a hot month, with an average temperature fluctuating between 18°C (64.4°F) and 30.1°C (86.2°F).

Temperature

In December, the average high-temperature registers at a hot 30.1°C (86.2°F), nearly identical to November's 27.5°C (81.5°F). In Boca do Monte, the nighttime temperature registers a significant drop from daytime peaks to an average of 18°C (64.4°F) in December.

Heat index

December's mean heat index is computed to be a sweltering 35°C (95°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Remember that heat index calculations are made for conditions in the shade with light wind. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

With an average relative humidity of 70%, December is the least humid month.

Rainfall

In Boca do Monte, Brazil, during December, the rain falls for 14.2 days and regularly aggregates up to 78mm (3.07") of precipitation. Throughout the year, in Boca do Monte, there are 146.4 rainfall days, and 974mm (38.35") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 05:27 and sunset at 19:22. On the last day of December, sunrise is at 05:38 and sunset at 19:39 -03.

Sunshine

With an average of 8.7h of sunshine, December has the most sunshine of the year in Boca do Monte.

UV index

The average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 during December translates into the following directions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.