April weather forecast
John, French Guiana

April, the same as March, is a moderately hot spring month in John, French Guiana, with temperature in the range of an average high of 29.7°C (85.5°F) and an average low of 23.1°C (73.6°F).

Temperature

The arrival of April sees an average high-temperature of a still moderately hot 29.7°C (85.5°F), hardly diverging from March's 29.5°C (85.1°F). In April, John experiences a temperature dip to an average of 23.1°C (73.6°F) at night.

Heat index

The average heat index in April is evaluated at a very hot 38°C (100.4°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The average relative humidity in April is 83%.

Rainfall

In April, the rain falls for 24.6 days. Throughout April, 91mm (3.58") 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

In John, the average length of the day in April is 12h and 14min.
On the first day of April, sunrise is at 06:32 and sunset at 18:43. On the last day of the month, sunrise is at 06:22 and sunset at 18:40 -03.

Sunshine

The average sunshine in April in John is 5.5h.

UV index

The months with the lowest UV index in John are January through June and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 6 during April, leads to the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended.