Hanoi, Vietnam Climate & Monthly Averages
The climate of Hanoi
Hanoi has a humid subtropical climate, marked by hot, humid summers and generally mild winters. Average daytime highs range from about 70°F (21°C) in January to around 92°F (34°C) in June, and the city records roughly 175 days of measurable precipitation a year.
Climate quick facts
- Hottest month: June - highs near 92°F (34°C)
- Coldest month: January - highs near 70°F (21°C)
- Record high: 106°F (41°C) · Record low: 40°F (4°C) (2015–2024)
- Wettest month: August (24 rainy days) · Sunniest: June (8.8 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
Temperatures through the year
The warmest stretch of the year centers on June. Highs average 92°F (34°C) and overnight lows stay near 80°F (27°C). The coolest month is January, with typical highs of 70°F (21°C) and lows around 58°F (14°C). Based on 2015–2024 weather data, temperatures have reached as high as 106°F (41°C) and dropped as low as 40°F (4°C).
Rain, sun and snow
August is usually the wettest month. It brings about 15.9 inches (404 mm) of rain over 24 days, while December is the driest. June brings the most sunshine, averaging 8.8 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 70° | 58° | 11 | 2.6 in | 4.1 h/day | 77% |
| February | 72° | 60° | 9 | 1.9 in | 4.3 h/day | 77% |
| March | 78° | 66° | 13 | 3.0 in | 3.8 h/day | 82% |
| April | 84° | 71° | 12 | 3.8 in | 6.3 h/day | 82% |
| May | 89° | 77° | 18 | 8.4 in | 8.3 h/day | 81% |
| June | 92° | 80° | 17 | 9.5 in | 8.8 h/day | 79% |
| July | 91° | 80° | 20 | 11.9 in | 8.7 h/day | 81% |
| August | 89° | 79° | 24 | 15.9 in | 7.9 h/day | 85% |
| September | 87° | 77° | 22 | 13.7 in | 7.7 h/day | 85% |
| October | 83° | 71° | 13 | 7.5 in | 7.7 h/day | 78% |
| November | 79° | 67° | 9 | 2.3 in | 7.2 h/day | 77% |
| December | 70° | 58° | 7 | 1.4 in | 5.3 h/day | 72% |
Hanoi month by month
Hanoi weather in January
January brings highs around 70°F (21°C), lows near 58°F (14°C), about 11 wet days - typically the coldest month of the year in Hanoi.
Hanoi weather in February
February brings highs around 72°F (22°C), lows near 60°F (16°C), about 9 wet days.
Hanoi weather in March
March brings highs around 78°F (26°C), lows near 66°F (19°C), about 13 wet days.
Hanoi weather in April
April brings highs around 84°F (29°C), lows near 71°F (22°C), about 12 wet days.
Hanoi weather in May
May brings highs around 89°F (32°C), lows near 77°F (25°C), about 18 wet days.
Hanoi weather in June
June brings highs around 92°F (34°C), lows near 80°F (27°C), about 17 wet days - typically the hottest month and the sunniest month of the year in Hanoi.
Hanoi weather in July
July brings highs around 91°F (33°C), lows near 80°F (26°C), about 20 wet days.
Hanoi weather in August
August brings highs around 89°F (32°C), lows near 79°F (26°C), about 24 wet days - typically the wettest month of the year in Hanoi.
Hanoi weather in September
September brings highs around 87°F (31°C), lows near 77°F (25°C), about 22 wet days.
Hanoi weather in October
October brings highs around 83°F (28°C), lows near 71°F (22°C), about 13 wet days.
Hanoi weather in November
November brings highs around 79°F (26°C), lows near 67°F (19°C), about 9 wet days.
Hanoi weather in December
December brings highs around 70°F (21°C), lows near 58°F (15°C), about 7 wet days - typically the driest month of the year in Hanoi.
Seasons in Hanoi
Spring (March through May)
Spring in Hanoi brings hot afternoons, with daytime highs averaging 84°F (29°C) and nights around 71°F (22°C); expect showers on roughly 43 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Summer (June through August)
Summer in Hanoi brings hot afternoons, with daytime highs averaging 91°F (33°C) and nights around 79°F (26°C); expect showers on roughly 61 days across the season.
Fall (September through November)
Fall in Hanoi runs hot, with daytime highs averaging 83°F (28°C) and nights around 72°F (22°C); expect showers on roughly 44 days across the season.
Winter (December through February)
Winter in Hanoi is mild and warm, with daytime highs averaging 71°F (22°C) and nights around 59°F (15°C); expect showers on roughly 27 days across the season.
Climate questions, answered
What is the average temperature in Hanoi?
Is Hanoi hot in summer?
Is Hanoi cold in winter?
How many rainy days does Hanoi get in a year?
Best time to visit Hanoi
The best time to visit Hanoi is generally November to February, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 73°F (23°C).
Pack for Hanoi with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - June nights average 80°F (27°C).
Hanoi temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.