January weather forecast
Grand-Santi, French Guiana

As Grand-Santi, French Guiana transitions from the end of the old year into January, there is a noticeable continuation of humidity levels. This month registers a high tendency for cloud coverage with pressure consistently remaining near 1011.9mb. The region presents a strong occurrence of rainfall, leaning towards making outdoor activities less prevalent. January holds a UV Index of 6, signifying a marginal increase in potential exposure to UV rays. The notable fact for this month is the lowest sunshine duration, at 5.3 hours per day, indicating shorter daylight hours compared to subsequent months.

Temperature

January's climate shows a minor adjustment in average high-temperatures to a warm 29.8°C (85.6°F) from December's 30.9°C (87.6°F). The average low-temperature in Grand-Santi during January nights is an agreeable 20.7°C (69.3°F).

Heat index

The heat index in January is calculated to be a very hot 39°C (102.2°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In Grand-Santi, the average relative humidity in January is 86%.

Rainfall

In Grand-Santi, French Guiana, in January, during 28 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Grand-Santi, during the entire year, the rain falls for 259.6 days and collects up to 915mm (36.02") of precipitation.

Daylight

In January, the average length of the day in Grand-Santi is 11h and 55min.
On the first day of the month, sunrise is at 06:44 and sunset at 18:37. On the last day of January, in Grand-Santi, sunrise is at 06:52 and sunset at 18:49 -03.

Sunshine

In Grand-Santi, the average sunshine in January is 5.3h.

UV index

In January, the average daily maximum UV index in Grand-Santi is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In January, the UV index of 6 transforms into the following advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.