What August feels like in Hanoi
August falls in Hanoi's wet season — the rainfall numbers rise clearly above the dry months. Expect proper heat in the afternoon — slow down between noon and four. Nights bring little relief: even the coolest hour of the night stays very warm. Thick, humid air means clothes cling and the heat feels stronger than the number.
Rain in Hanoi in August
Rain is part of normal life this month, falling on most days. Rain tends to come in heavy bursts: about 15.2 mm (0.6 in) on an average rainy day. That is heavier than Hanoi's usual 11.6 mm per rainy day across the year. August is Hanoi's wettest month of the year.
Daylight and sunshine in August
On 15 August the sun rises at about 5:35 am and sets around 6:28 pm local time, giving 12 h 52 min of daylight. Compared with mid-July, the day has lost 26 min. Measured sunshine covers about 61% of the daylight — there are plenty of bright spells.
How August compares to the rest of the year
Ranked by average high, August comes out as the 3rd warmest month in Hanoi. Afternoons run 0.9°C (1.6°F) cooler than in July, with 63 mm more rain. Temperatures keep falling into September. September averages a high of 30.5°C (86.9°F).
Who August suits
- Sightseeing: less ideal — rain falls on more than half the days.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Museums & indoor: a good choice — with rain on most days, galleries and museums make easy plans.
Tips for visiting Hanoi in August
Rain Protection
A compact umbrella and a light waterproof jacket.
Sun Protection
Loose, breathable clothing plus sunscreen and a wide-brimmed hat.
Quick questions
How warm is Hanoi in August?
Expect around 31.6°C (88.9°F) in the afternoon and 25.6°C (78.1°F) at night, which most visitors would call hot.
Does it rain a lot in Hanoi in August?
It does: about 23 rainy days bring roughly 350 mm, so plan some indoor options.
What should I wear in Hanoi in August?
The numbers point to rain protection and sun protection. Evenings feel similar to the day, so the same clothes work from morning to night.
Is August or September better for visiting Hanoi?
On our 12-month climate ranking, September comes out ahead (#9 of 12 vs #10). September is cooler and has fewer rainy days.