September marks the transition from summer to autumn in Vietnam, with clear regional differences in weather. Our Vietnam Weather Map for September shows average temperatures and rainfall patterns across major destinations to help you plan your trip. The north begins to cool down with pleasant, drier days — ideal for exploring Hanoi, Ha Long Bay, and Sapa. The central coast starts to see more rain as the wet season approaches, though sunny intervals are still common. The south reaches the peak of its rainy season, with frequent afternoon downpours and high humidity. Despite the rain, mornings are often bright, offering good opportunities to explore cities and the Mekong River Delta before showers arrive.
Download the high-quality weather map (PDF) in AI Chat (available in AI•Companion Pro). You can also get weather maps for other months the same way.
Notes:
- The weather map is intended as a general guide to help you plan your trip in advance. Actual weather conditions may vary.
- You can chat with AI•Companion to check the latest and more accurate weather updates for your destinations in Vietnam.
