Incheon weather by month
The best time to visit Incheon is May, June and October — 88/100 in May, 21°C and 8 rainy days. The best season is spring, March to May (80/100 on average).
The worst month is January at 46/100 — freezing, dry. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit South Korea →
Best season: March to May (80/100 on average) · worst January (46/100)
- Days
- 21°C
- Nights
- 14°C
- Wet days
- 8
- Sun
- 10 h
- Humidity
- 77%
- Daylight
- 14 h
Incheon, month by month
Comfort score out of 100 for the kind of trip Incheon is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Incheon through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Incheon in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 2 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Incheon
Real experiences from travellers' own write-ups, quoted with a link to the original.
Food & drink
We came out of Incheon Station's Exit 3 and the Paeru arch was right there across the street, an easy landmark that made finding Chinatown effortless. Jjajangmyeon here, thick hand-made noodles in a black bean sauce, was noticeably darker and more intensely flavored than the chain versions we'd eaten in Seoul, running us about 8,000 won a bowl at a shop a local pointed us toward. The streets themselves, lined with dragon-motif buildings and murals, made for an easy wander before or after the noodles. We rounded out the day with a trip to Songdo, a smart city built entirely on reclaimed land, and the contrast between century-old noodle shops and that gleaming new district in a single afternoon summed up Incheon perfectly.
Traveller notes on Incheon
What people who have been say about the place — the year-round notes first, then month by month.
Forum posters call May and June the best-weather stretch of the Korean year - warm days suited to short sleeves, with a thin layer still useful at night. The month itself shifts noticeably: early May can still want a light jacket or cardigan, while by month's end a t-shirt alone is usually enough. For Incheon specifically, posters point to Wolmido's theme park and traditional garden, the city's historic Chinatown (the oldest and largest in Korea), and Sorae Fish Market for fresh seafood and street food as the core things to do, with the Bupyeong underground market flagged as a particularly good option if a rainy day interrupts outdoor plans.
Forum posters describe South Korea in November, Incheon included, as cool with crowds thinning noticeably compared to peak autumn-foliage season. Posters report daytime temperatures typically 8-10C early in the month, with nights already near or below freezing, and mid-November bringing a further drop, often into the 0-10C range, genuinely requiring winter clothing by that point. Posters are direct that November sits in an awkward seasonal gap - past the vivid autumn leaves but before any real snow - making it, in some posters' view, one of the less visually rewarding months, even though the cooler weather and lighter crowds have real appeal for beach areas and quieter sightseeing. Posters generally rate November as a workable but transitional month for Incheon, cool and crowd-free rather than scenically peak.
Add your own note from Incheon's card on the map.