Hanoi's Climate
Hanoi sits at the heart of the Red River delta and has a humid subtropical climate with four fairly distinct seasons. Summers (May–September) are hot and sticky with high humidity, frequent showers, thunderstorms and the occasional typhoon, while winters (December–February) turn cold and dry, with spells dipping to 8–12°C. In between, spring brings the clammy nom drizzle and high humidity, while autumn (September–November) is cool, dry and the loveliest time of year. Air quality tends to worsen in winter. This page offers an hourly and 14-day forecast plus detailed metrics like humidity, wind, UV and AQI.