April weather forecastDumai, Indonesia

Weather in April

April, the same as March, in Dumai, Indonesia, is a hot spring month, with an average temperature varying between 24.6°C (76.3°F) and 32.2°C (90°F).

Temperature

Entering April, Dumai's average high-temperature reads a still tropical 32.2°C (90°F), indicating a close resemblance to the previous month's climate. During April, Dumai's temperature averages to a warm 24.6°C (76.3°F) at night.

Heat index

The average heat index in April is calculated to be a life-threatening hot 46°C (114.8°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In April, the average relative humidity is 81%.

Rainfall

In Dumai, during April, the rain falls for 25.6 days and regularly aggregates up to 112mm (4.41") of precipitation. Throughout the year, there are 286.4 rainfall days, and 1200mm (47.24") of precipitation is accumulated.

Sea temperature

In Dumai, in April, the average water temperature is 29.9°C (85.8°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

The average length of the day in April is 12h and 9min.
On the first day of April, sunrise is at 06:14 and sunset at 18:22. On the last day of the month, sunrise is at 06:06 and sunset at 18:16 WIB.

Sunshine

In Dumai, Indonesia, the average sunshine in April is 8.2h.

UV index

January through September and November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 during April translates into the following recommendations:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. 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. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take note! The UV strength of the Sun elevates when reflected off water and sand.