Quang Binh has a tropical monsoon climate with two distinct seasons: the dry season (April - August) and the rainy season (September - March of the following year). September is the transition period from the dry season to the rainy season, bringing unique but also challenging weather characteristics.
- Temperature: The average temperature in September ranges from 25°C to 30°C, lower than during the dry season (36°C - 40°C). Days are usually cool, but evenings can be chilly due to the impact of rain showers.
- Rainfall: September marks the beginning of the rainy season, with an average annual rainfall of about 2,000 - 2,300 mm, concentrated in September, October, and November. Rain often occurs in the afternoon or evening, sometimes drizzling all day.
- Storms and floods: Due to steep and narrow terrain, Quang Binh is prone to sudden storms and flash floods in September. Travelers need to monitor weather forecasts frequently to avoid bad weather days.
- Humidity and air: High humidity, usually above 80%, combined with early morning fog, creates a poetic, tranquil landscape, but also requires careful preparation to maintain health.
Although it is not the ideal time for outdoor activities such as beach swimming, September offers a peaceful and fresh atmosphere, suitable for those who love exploring culture, nature, and slow travel experiences.



