December weather forecast
John, French Guiana

The first month of the winter, December, is still a hot month in John, French Guiana, with an average temperature ranging between max 30.2°C (86.4°F) and min 22.7°C (72.9°F).

Temperature

John's average high-temperature in December is a still hot 30.2°C (86.4°F), indicating a subtle variation from November. In December, in John, French Guiana, the average low-temperature is an agreeable 22.7°C (72.9°F).

Heat index

The heat index value during December is evaluated at a fiery hot 39°C (102.2°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In John, French Guiana, the average relative humidity in December is 83%.

Rainfall

In December, the rain falls for 21.9 days. Throughout December, 84mm (3.31") of precipitation is accumulated. In John, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

The month with the shortest days in John is December, with an average of 11h and 48min of daylight.
On the first day of the month, sunrise is at 06:27 and sunset at 18:19. On the last day of December, sunrise is at 06:42 and sunset at 18:32 -03.

Sunshine

In John, French Guiana, the average sunshine in December is 6.6h.

UV index

The months with the lowest UV index are January through June and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 6 in December leads to these guidelines:
Inhibit overexposure. Warding off sun damage is of utmost importance. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.