Vietnam is experiencing its first cold air mass of the year starting today, September 9th. The arrival of this cold air will bring a shift in weather conditions, most notably with rainfall expected across the northern regions of the country. The change in weather is anticipated to begin this afternoon, with skies darkening and precipitation increasing. This marks a significant transition from the recent warm weather patterns, signaling the approach of autumn in Vietnam. Residents in northern Vietnam are advised to prepare for cooler temperatures and wet conditions. This initial cold spell is expected to be a temporary change, but an indicator of the coming season.