Hanoi, Vietnam Weather
Hanoi hourly forecast: next 24 hours
Today's high of 76°F (24°C) is about 11°F (6°C) below the typical September high of 87°F (31°C).
Current conditions in detail
Hanoi weather tomorrow (Thursday, September 17)
Tomorrow in Hanoi looks light rain shower, with a high of 76° and an overnight low of 73°. There is a 94% chance of rain - plan accordingly. Winds top out near 5 mph, and the UV index reaches 2 (low).
Hanoi 14-day forecast
About the weather in Hanoi
Hanoi is genuinely wet: 81.8 inches (2078 mm) falls in an average year, across 175 days that carry about 11.9 mm each when they come. Temperatures are the calmer variable, running 70°F (21°C) to 92°F (34°C) between January and June.
Hanoi weather: quick facts
- Hottest month: June - highs near 92°F (34°C)
- Coldest month: January - highs near 70°F (21°C)
- Decade extremes (2015-2024): 106°F (41°C) high · 40°F (4°C) low
- Wettest month: August (24 rainy days) · Sunniest: June (8.8 h sun/day)
- Climate type: humid subtropical
- Annual swing: 12°C between the average warmest and coolest month · day to night: 7°C
- Months averaging 30°C or hotter: 5
- Average humidity: 80%
Temperatures through the year
January bottoms out at 70°F (21°C) in daylight, 58°F (14°C) after dark. At its warmest, in June, Hanoi runs to 92°F (34°C) in the afternoon and back to 80°F (27°C) by dawn. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 106°F (41°C) and the lowest daily minimum 40°F (4°C). August is the wettest month at 15.9 inches (404 mm) over 24 days; December is the driest.
Rain, sun and snow
Relative humidity averages 80% across the year, more humid than roughly 84% of the cities we track - enough that summer afternoons feel hotter than the thermometer says, which is what the dew point converter is for. Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is November through February. Sunshine averages 6.7 hours a day over the year - duller than almost anywhere else we cover, peaking in June at 8.8 hours. Days and nights are about 7°C apart on average - narrower than about 86% of the cities we track.
Season by season
Spring (March through May)
Through spring, Hanoi is hot: 84°F (29°C) by day, 71°F (22°C) after dark, and rain falls on around 43 of the 90 days.
Summer (June through August)
Summer is hot here - highs near 91°F (33°C), nights near 79°F (26°C), and rain falls on around 61 of the 90 days.
Fall (September through November)
Through fall, Hanoi runs hot: 83°F (28°C) by day, 72°F (22°C) after dark, and rain falls on around 44 of the 90 days.
Winter (December through February)
Winter is pleasantly warm here - highs near 71°F (22°C), nights near 59°F (15°C), and expect showers on roughly 27 days across the season.
Average temperatures in Hanoi by month
| 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% |