September weather forecast
Cửa Ông, Vietnam

The first month of the autumn, September, is also a moderately hot month in Cửa Ông, Vietnam, with an average temperature ranging between min 26.1°C (79°F) and max 29.8°C (85.6°F).

Temperature

As August turns into September, the average high-temperatures rest at a moderately hot 29.8°C (85.6°F), showing a minor variation from the prior month. Cửa Ông sustains a near constant temperature throughout September, with nighttime averages of 26.1°C (79°F).

Heat index

The heat index value for September is estimated at a very hot 36°C (96.8°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
The metrics for the heat index are tailored for both shady environments and light winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Cửa Ông, in September, during 18.3 rainfall days, 137mm (5.39") of precipitation is typically accumulated. In Cửa Ông, during the entire year, the rain falls for 209.3 days and collects up to 1269mm (49.96") of precipitation.

Daylight

In Cửa Ông, the average length of the day in September is 12h and 16min.
On the first day of September, sunrise is at 05:34 and sunset at 18:06. On the last day of the month, sunrise is at 05:41 and sunset at 17:39 +07.

Sunshine

In Cửa Ông, Vietnam, the average sunshine in September is 9.1h.

UV index

May through September, 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 vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 7 during September leads to these instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.