Weather in Hanoi in October

A good month. October works. It is not the peak, but nothing about it fights you. The heat itself is manageable at 28.5 °C, but 84% humidity is what you will actually feel.

October ranks 6 of 12 in Hanoi: past the worst of the year but short of December, which is the month to book if the dates are open.

Rain on 11 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 84% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 10 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest October day reached 33.4 °C and the coldest night fell to 9.9 °C, and the wettest single day dropped 167 mm — roughly 135% of the month's rain in one day.

October is moderately variable: 16 mm in the driest year against 379 mm in the wettest, around an average of 124 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.

Wind is light at 5.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, high enough to notice on the warm days without dominating them.

How October sits in the year

The month is on the way down: 2.5 °C cooler than September, with November dropping another 3 °C. The first week and the last are not the same trip. Rain has already shifted: 7 days fewer than September had.

Daylight in October

11.7 hours of daylight, losing 0.6 hours across the month. That is between Hanoi's extremes of 13.4 and 10.9 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 21.2 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

October in Hanoi versus nearby

If Hanoi is one option among several, the nearby comparison is worth making. Haiphong is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Thanh Hóa is close enough to be a coin toss — within a degree on temperature, 4 days more rain.

So: October is a compromise. December is 26 points better and is what Hanoi is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Hanoi

See all twelve months in Hanoi, or where else to go in October.