What to Wear in Seoul in October
Seoul in October: 20°C / 68°F afternoons, 11°C / 52°F mornings, 6 rain days — the rain stops and the trench comes out.
- Stone trench, belted — open at 2 pm, closed at 8 pm on the Han; the whole 9°C swing in one coat
- Heather-grey crew knit — the daytime layer under the trench in Hannam-dong and Seongsu
- Black ribbed turtleneck — the evening base once the sun goes at ten to six
- Black pleated trousers — the line the city draws under everything; clean, cropped, no distressing
- Black horsebit loafers — 15,000 steps of pavement and subway stairs in a dry month
- Structured black bag — Seoul reads the bag before it reads the coat
- A puffer or wool overcoat — November's coats; October afternoons reach 20°C / 68°F
- A rain shell as the hero — about 6 wet days and 52mm; a compact umbrella covers it
- Bare legs or shorts on an 11°C / 52°F morning, colder still on the Bukhansan trail
- Booking the first week for foliage — Bukhansan peaks in the last ten days of the month
Seoul's October is the month the umbrella goes back in the drawer and the coat comes out of it. Korea Meteorological Administration (KMA) normals put the afternoon at 20°C / 68°F and the morning at 11°C / 52°F with 52mm of rain, down from 141mm in September and 348mm in August, across about six wet days. That nine-degree swing is what a trench is for: open on a Seongsu terrace at two, belted on the Han at eight. Two public holidays, National Foundation Day on the 3rd and Hangul Day on the 9th, send the city up Bukhansan, and the mountain's colour arrives in the last ten days. Pack precise, pack monochrome, and let one burgundy knit do the talking.
August gave Seoul 348mm of rain. October gives it 52. The trench is not a style choice here; it is what a dry, nine-degree day asks for.
The capsule
01Stone trench coat, double-breasted, beltedBegin with the coat, because this is the month Seoul agrees on one. A stone double-breasted trench with a belt covers the full October day: worn open over a knit at 20°C / 68°F, belted over the turtleneck at 11°C / 52°F, and never too warm, which a wool coat already is at two in the afternoon. Stone rather than navy because the city's October palette runs black, grey and oatmeal, and the coat is the one light piece in it.
02Heather-grey crew knit, raglan, croppedYour daytime layer under the trench. A heather-grey raglan crew, cropped so it clears the belt, is what Hannam-dong wears to lunch: quiet, exact, no logo. Wool-blend rather than cotton, because 11°C / 52°F on a Tuesday morning at Gyeongbokgung is a knit temperature, and the afternoon never gets hot enough to punish it.
03Black ribbed turtleneckThe evening base once the sun goes at ten to six. A black ribbed turtleneck under the belted trench is the Seoul night uniform from Hannam to a Hangang park bench, and it is the piece that lets you leave the scarf at home. Ribbed for warmth at the neck, fitted enough to sit under a coat without bulk.
04Burgundy lambswool crewOne colour, deliberately. Seoul's October is monochrome by consensus, and the way the city breaks it is with a single deep accent, never a print. A burgundy lambswool crew swaps in for the grey on the day you climb Bukhansan for the colour, and it is the one thing in the bag that photographs against the maples.
05Black pleated trousers, straight, cropped at the ankleBlack pleated trousers, straight and cropped at the ankle, are the line Seoul draws under everything. They take the loafers and the turtleneck to dinner in Gangnam and the knit and the trench to a Seongsu warehouse café without changing, and a crease reads as intent here where a distressed jean reads as tourist.
06Black leather horsebit loafersA black leather loafer with a horsebit is the October shoe because the month is dry enough to allow it: about six wet days, none of them the soaking kind. Fifteen thousand steps of pavement and subway stairs want a rubber sole under the leather, and the polish matters, because Seoul reads shoes before it reads faces.
07Black structured flap bag, top handle and strapStructured, black, with a top handle and a strap, because the bag is the first thing this city notices. It sits flat under a trench belt on the subway, holds a phone, a T-money card and the compact umbrella you will use twice, and does not sag by evening the way a soft tote does.
08White heavyweight cotton tee, boxyUnder the grey crew at two, alone under the open trench on the one 22°C day the month throws at you. A heavyweight white cotton tee, boxy and plain, is what makes the monochrome look like a choice rather than a uniform; thin and fitted, it reads as underwear beneath a trench.
Day to night
Stone trench open · heather-grey crew · white tee · black pleated trousers · horsebit loafers · structured bag. Gyeongbokgung at nine in 11°C / 52°F, then Seongsu for lunch with the coat over the chair.
Trench belted · black turtleneck · same trousers and loafers. Dinner in Hannam-dong at eight, then the Han at Banpo with the fountain lights and the coat closed.
A suggested look — stone belted trench, black ribbed turtleneck, black pleated trousers, black horsebit loafers, black structured shoulder bag.
What to avoid
- A puffer or wool overcoat — November's coats; 20°C / 68°F afternoons
- Packing around rain — 52mm across about six days, a tenth of August
- Bare legs or shorts — 11°C / 52°F mornings, colder on the Bukhansan trail
- Distressed denim, logos, scuffed trainers — the register is precise
- Booking the first week for foliage — Bukhansan peaks in the last ten days
Frequently asked questions
Per Korea Meteorological Administration normals for 1991–2020 at the Seoul station: the average daily maximum is 20.2°C, the average minimum 10.6°C and the monthly mean 15.0°C, with 52.2mm of rain. NOAA NCEI's daily record for the same station over the same thirty Octobers puts wet days at about six, most of them under 10mm, and reproduces KMA's temperatures within a degree. October is Seoul's driest month since March, and the start of the clear, dry stretch that runs into November.
Yes, and it is the month most Seoul residents would choose. The rain has gone and the humidity with it, and the afternoons hold at 20°C / 68°F. Two public holidays fall in the month, National Foundation Day on 3 October and Hangul Day on 9 October, so expect the palaces and Bukhansan to be full on those days and book dinner ahead. Chuseok, which closed much of the city from 24 to 26 September in 2026, is over, so restaurants and markets are fully open.
A stone belted trench, a heather-grey crew knit, a black ribbed turtleneck, one burgundy knit for the foliage day, black pleated straight trousers, black horsebit loafers with a rubber sole, a structured black bag and a heavyweight white tee. Add a compact umbrella you will barely use. Leave the puffer, the rain shell and anything distressed at home; the register is precise and the month is dry.
The colour reaches Seoul from the north and from the top of the mountains down. Korea Forest Service's annual foliage forecasts have placed Bukhansan's peak in the last ten days of October in recent years, with Namsan and the palace grounds following into the first week of November, and the ginkgo along the city avenues turning last. If foliage is the point, book the final week of the month and pack the burgundy knit.
September is still a warm, wet month: KMA puts it at 26.2°C by day and 17.7°C at night with 141.5mm of rain, and it holds Chuseok. October drops six degrees at both ends to 20.2°C and 10.6°C and cuts the rain to 52mm. September needs a shirt and a plan for showers; October needs a knit in the morning, a trench all day and a turtleneck after dark, and the umbrella becomes optional.
Precise and monochrome. The October street in Hannam-dong and Seongsu is a stone or black trench over a fine knit, straight black or grey trousers with a clean crease, a leather loafer or a spotless minimal sneaker, and a structured bag. Colour appears once, as a burgundy knit or a scarf, never as a print. The tell is condition: nothing scuffed, nothing distressed, nothing oversized enough to hide the line.
Sources
- Korea Meteorological Administration — 1991–2020 climate normals, Seoul (KMA station 108) stationKMA's published 1991–2020 normals for temperature and rainfall. The wet-day count is computed from NOAA NCEI's global-summary-of-the-day record for the same station (47108099999, 30 Octobers), which reproduces KMA's temperatures within 0.7°C; KMA states rain days at a different threshold.
