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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Maple Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Hanoi has a humid subtropical climate with distinct seasons. The live forecast above shows current conditions. Winters are cool and dry, summers hot and rainy. Spring and autumn bring the most comfortable weather, with mild temperatures and lower humidity.
What is the typical weather in Hanoi?
Hanoi sees a wide range of temperatures throughout the year. From November to March, the northeast monsoon brings cool, dry air, with average highs around 20°C to 23°C. January is the coolest month, with overnight lows near 14°C. From May to September, the southwest monsoon brings heat and heavy rain; July and August are the hottest months, with highs often above 33°C. Humidity stays high year-round, especially during the rainy season.
When is the best time to visit Hanoi?
Spring (March to April) and autumn (October to November) offer the most pleasant conditions. Temperatures range from 20°C to 28°C, and skies are often clear. These months are ideal for exploring the city on foot. The rainy season (May to September) sees frequent downpours and occasional typhoons. Winter (December to February) can be chilly and overcast, but crowds are smaller.
What is the weather in Hanoi in January?
January is the coolest month, with average highs near 20°C and lows around 14°C. It is part of the dry season, so rain is light. Expect overcast skies and occasional drizzle. Pack a light jacket.
Does Hanoi ever get cold?
Yes, from December to February temperatures can drop to 10°C or lower at night, especially during cold surges from the north. Daytime highs remain around 18–22°C. Warm clothing is advisable if visiting in winter.
How humid is Hanoi?
Humidity averages 75–85% year-round. It peaks during the summer monsoon (June–August) at over 80%, making the heat feel more intense. Winter humidity is lower, around 70–75%, but still noticeable.
For comparisons with Canadian cities, see our Toronto weather or Calgary weather pages. For longer-range outlooks, check the 10-day forecast page.