September weather forecast
Bồng Sơn, Vietnam

As September rolls in, weather in Bồng Sơn undergoes a substantial shift. While temperatures still linger around 30.3°C (86.5°F), the main highlight of this month is the spike in rainfall. An impressive 171mm (6.73") of precipitation spread across 24.3 days signals the peak of the wet season. Winds shift from South to North, an indication of the changing seasons. However, longer sunshine hours at 8.6 hours and higher pressure levels balance the wetness brought by the rains making this month a mix of sun and showers.

Temperature

As Bồng Sơn, Vietnam, transitions from August to September, the average high-temperatures adjust to a still tropical 30.3°C (86.5°F), nearly the same as the previous 31.5°C (88.7°F). Bồng Sơn's nighttime temperature in September falls to an average of 24.8°C (76.6°F).

Heat index

For September, the heat index is estimated at a torrid 39°C (102.2°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. 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.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

The average relative humidity in September is 80%.

Rainfall

In Bồng Sơn, during September, the rain falls for 24.3 days and regularly aggregates up to 171mm (6.73") of precipitation. Throughout the year, there are 245.1 rainfall days, and 1507mm (59.33") of precipitation is accumulated.

Daylight

In Bồng Sơn, the average length of the day in September is 12h and 13min.
On the first day of September, sunrise is at 05:32 and sunset at 17:55. On the last day of the month, sunrise is at 05:33 and sunset at 17:34 +07.

Sunshine

In Bồng Sơn, the average sunshine in September is 8.6h.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 7 during September leads to these advisories:
Resist extreme sun exposure. Guarding against solar damage is essential. 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. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.