Weather in Daegu in September

A good month. September works. It is not the peak, but nothing about it fights you. Highs average 25.5 °C, lows 16.5 °C, and rain falls on 11 days — nothing in the month is working against you.

September ranks 4 of 12 in Daegu: past the worst of the year but short of October, 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. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest September day reached 33.4 °C and the coldest night fell to 7.1 °C, and the wettest single day dropped 131 mm — roughly 89% of the month's rain in one day.

September is moderately variable: 50 mm in the driest year against 356 mm in the wettest, around an average of 147 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 7.5 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 September sits in the year

The month is on the way down: 4.7 °C cooler than August, with October dropping another 5.2 °C. The first week and the last are not the same trip. Rain is the thing that moves: October brings 6 days less of it, so pushing the dates later buys drier weather.

Daylight in September

12.5 hours of daylight, losing 1.1 hours across the month. That is between Daegu's extremes of 14.6 and 9.7 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 36.8 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

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.

September in Daegu versus nearby

If Daegu is one option among several, the nearby comparison is worth making. Busan is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Gwangju is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: September works, with October the better month by 12 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Daegu

See all twelve months in Daegu, or where else to go in September.