September weather forecast
Vinh, Vietnam

September introduces Vinh to the autumn season with the temperatures following a gradual decline from the summer's peak. The humidity levels follow a similar trend, ensuring more enjoyable weather conditions. A more significant cutdown of cloud cover rewards Vinh with clear skies and plenty of sunshine. The rainfall, however, decreases slightly from the previous month’s 169mm (6.65") offering a reprieve from frequent showers. The soft winds continue to prevail this month as well, offering mild, pleasant conditions.

Temperature

The shift from August to September is characterized by an average high-temperature of a still tropical 30.4°C (86.7°F), not significantly different from the 31.8°C (89.2°F) of August. An average low-temperature of 25.1°C (77.2°F) is common during the nights of September.

Heat index

September's heat index is computed to be a torrid 39°C (102.2°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The average relative humidity in September is 79%.

Rainfall

September is the month with the most rainfall. Rain falls for 18.8 days and accumulates 169mm (6.65") of precipitation.

Daylight

The average length of the day in September is 12h and 15min.
On the first day of the month, sunrise is at 05:42 and sunset at 18:11. On the last day of September, sunrise is at 05:47 and sunset at 17:46 +07.

Sunshine

In Vinh, the average sunshine in September is 9h.

UV index

The months with the highest UV index are April through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.