April weather forecast
Dumai, Indonesia

April, like March, is another hot spring month in Dumai, Indonesia, with an average temperature ranging between min 24.6°C (76.3°F) and max 32.2°C (90°F).

Temperature

With April's arrival, Dumai's weather records an average high-temperature of a still tropical 32.2°C (90°F), marking little difference from March's 32°C (89.6°F). Throughout April, Dumai records an average temperature of 24.6°C (76.3°F) at night.

Heat index

The average heat index in April is appraised at a burning hot 46°C (114.8°F). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.
Note that heat index values are valued for light wind and location in the shade. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In April, the average relative humidity in Dumai is 81%.

Rainfall

In Dumai, in April, it is raining for 25.6 days, with typically 112mm (4.41") of accumulated precipitation. Throughout the year, in Dumai, Indonesia, there are 286.4 rainfall days, and 1200mm (47.24") of precipitation is accumulated.

Sea temperature

In April, the average sea temperature is 29.9°C (85.8°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

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

Sunshine

The average sunshine in April in Dumai 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 health hazard from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 7 during April morphs into the following directions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Heads up! UV intensity is amplified by reflections from water and sand.