June weather forecast
Dumai, Indonesia

The first month of the summer, June, is still a hot month in Dumai, Indonesia, with an average temperature varying between 24.4°C (75.9°F) and 32.8°C (91°F).

Temperature

Dumai's June weather, marked by an average high temperature of 32.8°C (91°F) and an average low temperature of 24.4°C (75.9°F), is the warmest in the year.

Heat index

June's average heat index is calculated to be a life-threatening hot 47°C (116.6°F). Be careful: Heat exhaustion and heat cramps are probable. Heatstroke may result from extended activity.
Understanding the heat index involves considering values for shaded locales with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. 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 hold particular importance for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In June, the average relative humidity is 79%.

Rainfall

In Dumai, in June, it is raining for 20.9 days, with typically 83mm (3.27") of accumulated precipitation. Throughout the year, there are 286.4 rainfall days, and 1200mm (47.24") of precipitation is accumulated.

Sea temperature

May and June, with an average sea temperature of 30.2°C (86.4°F), are months with the warmest seawater in Dumai.
Note: Water activities might not feel as soothing when temperatures are more than 30°C (86°F).

Daylight

With an average of 12h and 12min of daylight, June has the longest days of the year.
On the first day of the month, sunrise is at 06:05 and sunset at 18:18. On the last day of June, sunrise is at 06:11 and sunset at 18:24 WIB.

Sunshine

The average sunshine in June is 8.4h.

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 reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 7 in June transforms into the following instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.