April weather forecast
Black River, Jamaica

As April brings in the true start of the warmer months, with a noticeable increase in temperature from 19.9°C (67.8°F) to 28.4°C (83.1°F). Black River continues to be enveloped in humidity, fostering an increase in rainfall to 127mm (5"). Sea temperatures also rise, extending more opportunities for water-based activities. Despite these increases, the pressure levels see a drop, further amping up the anticipation of the potential changes in the upcoming summer period.

Temperature

A minimal variation is noted in Black River's average high-temperature at the onset of April, reaching a still moderately hot 28.4°C (83.1°F) from March's 27.6°C (81.7°F). The average temperature in Black River, Jamaica, during April nights dips to an enjoyable 19.9°C (67.8°F).

Heat index

Throughout April, the heat index is estimated at a hot 34°C (93.2°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

In Black River, the average relative humidity in April is 83%.

Rainfall

In April, in Black River, Jamaica, the rain falls for 25.4 days. Throughout April, 127mm (5") of precipitation is accumulated. Throughout the year, in Black River, there are 297.9 rainfall days, and 1472mm (57.95") of precipitation is accumulated.

Sea temperature

In Black River, Jamaica, in April, the average water temperature is 27.8°C (82°F).
Note: Water activities including swimming and diving at temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.

Daylight

In April, the average length of the day is 12h and 34min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:25. On the last day of April, in Black River, sunrise is at 05:44 and sunset at 18:32 EST.

Sunshine

In Black River, the average sunshine in April is 9.1h.

UV index

The average daily maximum UV index in April is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 6 in April transforms into this advice:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Caution! The Sun's UV intensity grows with reflections off sand and water.