Weather in Tokyo in October

A good month. October is a solid month to be in Tokyo. Highs average 22.1 °C, lows 14.7 °C, and rain falls on 14 days — nothing in the month is working against you.

October ranks 4 of 12 in Tokyo: past the worst of the year but short of May, which is the month to book if the dates are open.

This is wet-season rain: 14 wet days and 6 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average October reaches 30 °C. Across the twenty years measured, the hottest October day reached 30.1 °C and the coldest night fell to 6.9 °C, and the wettest single day dropped 137 mm — roughly 56% of the month's rain in one day.

October is moderately variable: 60 mm in the driest year against 580 mm in the wettest, around an average of 246 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.

Wind is light at 9.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 82%, high enough to notice on the warm days without dominating them.

How October sits in the year

The month is on the way down: 5.4 °C cooler than September, with November dropping another 5.3 °C. The first week and the last are not the same trip.

Daylight in October

11.3 hours of daylight, losing 1.1 hours across the month. That is between Tokyo's extremes of 14.6 and 9.8 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 24.9 °C in October — warm enough to stay in as long as you like. The sea peaks at 27.8 °C in August and bottoms out at 18 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

October in Tokyo versus nearby

If Tokyo is one option among several, the nearby comparison is worth making. Utsunomiya is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Hamamatsu is close enough to be a coin toss — within a degree on temperature, 2 days less rain.

So: October is effectively as good as it gets here — 5 points behind May, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Tokyo

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