July weather forecast
Dumai, Indonesia

July, like June, is another hot summer month in Dumai, Indonesia, with an average temperature ranging between min 24.3°C (75.7°F) and max 32.5°C (90.5°F).

Temperature

Dumai sees the arrival of July with an average high-temperature of a still hot 32.5°C (90.5°F), indicating a subtle variation from June. Dumai experiences an average low-temperature reading of 24.3°C (75.7°F) throughout July.

Heat index

In July, the average heat index is calculated to be a life-threatening hot 46°C (114.8°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', shows a temperature sensation when both heat and moisture conditions are combined. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The average relative humidity in July is 79%.

Rainfall

In Dumai, during July, the rain falls for 22.7 days and regularly aggregates up to 81mm (3.19") of precipitation. Throughout the year, there are 286.4 rainfall days, and 1200mm (47.24") of precipitation is accumulated.

Sea temperature

In July, the average sea temperature is 29.9°C (85.8°F).
Note: For any water activity, temperatures between 25°C (77°F) and 29°C (84.2°F) are deemed excellent and extremely satisfying for enduring periods.

Daylight

The average length of the day in July is 12h and 13min.
On the first day of July, sunrise is at 06:11 and sunset at 18:24. On the last day of the month, sunrise is at 06:15 and sunset at 18:26 WIB.

Sunshine

In July, the average sunshine 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 of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 7 in July, converts into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take heed! Reflections of sand and water make the Sun's UV rays stronger.