January weather forecast
La Grève, French Guiana

January, the same as December, is a moderately hot winter month in La Grève, French Guiana, with an average temperature varying between 20.8°C (69.4°F) and 29.7°C (85.5°F).

Temperature

La Grève's average high-temperature in January sits at a warm 29.7°C (85.5°F), showing little difference from the previous month. La Grève witnesses an average low-temperature of 20.8°C (69.4°F) throughout the month of January.

Heat index

January's mean heat index is appraised at a very hot 39°C (102.2°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', 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. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in January in La Grève, French Guiana, is 87%.

Rainfall

In La Grève, in January, during 26.8 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In La Grève, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.

Daylight

In La Grève, the average length of the day in January is 11h and 56min.
On the first day of the month, sunrise is at 06:40 and sunset at 18:35. On the last day of January, in La Grève, sunrise is at 06:49 and sunset at 18:46 -03.

Sunshine

The average sunshine in January in La Grève is 4.9h.

UV index

The months with the lowest UV index in La Grève are January, March and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 5 during January translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.