Hanoi, Vietnam climate
Average temperatures, precipitation and all-time records for Hanoi, Vietnam, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is June, averaging a high of 34°C, and its coldest is January, with an average low of 14°C.
Hanoi is the capital and second-most populous municipality of Vietnam. It encompasses an area of 3,358.6 km2 (1,296.8 mi2), and as of 2025 has a population of 8,807,523. via Wikipedia
Hanoi average temperatures by month
Typical daily high and low, and average precipitation, for each month in Hanoi, Vietnam, based on 1980–2026 records. The wettest month is August (10 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 20°C | 14°C | 3 mm |
| February | 22°C | 16°C | 3 mm |
| March | 25°C | 18°C | 3 mm |
| April | 29°C | 22°C | 3 mm |
| May | 32°C | 25°C | 8 mm |
| June | 34°C | 27°C | 8 mm |
| July | 33°C | 27°C | 8 mm |
| August | 33°C | 26°C | 10 mm |
| September | 32°C | 25°C | 8 mm |
| October | 29°C | 23°C | 5 mm |
| November | 26°C | 19°C | 3 mm |
| December | 22°C | 15°C | 0 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 40°C on 2017-06-04
- Coldest day on record: 4°C on 1999-12-23
Percentiles compare each day to Hanoi, Vietnam's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →