Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Ulsan is from April, May, October. — consistent weather climate
🌧Rainy
| Score | 27 | 29 | 47 | 75 | 82 | 70 | 46 | 44 | 56 | 82 | 63 | 32 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Cold | Cold | Cold | Cool & rainy | Mild | Rainy | Rainy | Hot & rainy | Rainy | Mild | Cold | Cold |
| Temperature | -3–7°C | -1–9°C | 3–14°C | 8–18°C | 12–23°C | 17–26°C | 22–29°C | 23–30°C | 19–25°C | 12–20°C | 5–15°C | -2–8°C |
| Feels like | -8–2°C | -6–5°C | -1–11°C | 5–17°C | 11–24°C | 19–28°C | 26–33°C | 27–35°C | 20–27°C | 10–20°C | 2–13°C | -6–4°C |
| Precipitation | 41mm 5 days | 44mm 5 days | 81mm 7 days | 100mm 8 days | 93mm 7 days | 159mm 11 days | 256mm 17 days | 211mm 17 days | 252mm 16 days | 99mm 7 days | 46mm 4 days | 34mm 3 days |
| Sunshine | 7.7h ☀︎ 76% | 8.4h ☀︎ 77% | 8.7h ☀︎ 73% | 9.0h ☀︎ 69% | 9.9h ☀︎ 71% | 8.1h ☀︎ 56% | 7.1h ☀︎ 50% | 9.6h ☀︎ 72% | 6.8h ☀︎ 55% | 8.1h ☀︎ 71% | 8.0h ☀︎ 77% | 7.9h ☀︎ 80% |
| Wind | NW · 18 km/h | NW · 18 km/h | NW · 17 km/h | NW · 18 km/h | SW · 17 km/h | SE · 15 km/h | S · 15 km/h | E · 15 km/h | N · 16 km/h | NW · 16 km/h | NW · 15 km/h | NW · 17 km/h |
| Humidity (%) | 57% | 58% | 65% | 67% | 69% | 77% | 84% | 82% | 82% | 74% | 69% | 60% |
| Day length | 10.1h | 10.9h | 12.0h | 13.1h | 14.0h | 14.5h | 14.3h | 13.5h | 12.4h | 11.3h | 10.3h | 9.8h |
Held in the Jangsaengpo Whale Culture Village, this spring festival celebrates the city's historic whaling heritage with…
This autumn festival celebrates the vast silver reed fields along the Taehwagang River, one of Ulsan's most photogenic n…
South Korea’s industrial capital empties of leisure travellers right when its coastal weather peaks in May and October, only to pack out during the freezing dark of December.
Ulsan is built on a scale that defies the imagination. Giant shipyard cranes tower along the coastline, oil refining towers flare orange against the twilight, and car assembly lines hum at a colossal pace. Most visitors arrive with clipboards or hard hats rather than suitcases, which leaves the city’s extraordinary natural fringe curiously uncrowded for those who come simply to look. Hemmed in by rugged coastal headlands and split down the middle by a wide, clean river, Ulsan lives two distinct lives: one of relentless heavy industry, and another of maritime winds, coastal pines, and riverside trails. Finding the right time to visit is largely a matter of dodging the monsoon washouts and the midwinter rush, sliding instead into the calm, temperate windows when the city breathes easy.
May delivers the finest conditions of the year in Ulsan, and April is not far behind. As the chill of early spring softens, the sea breeze loses its bitter bite and settles into a steady, comfortable warmth. Midday temperatures hover in the low twenties, the sun shines generously across the bays, and humidity remains remarkably low before the summer swamp rolls in.
What makes this window truly compelling is the lack of competition. While nearby Busan absorbs massive crowds of spring travellers, Ulsan remains astonishingly peaceful. You can wander the waterfront at Jangsaengpo Port with the harbour air cool on your face, watching fishing boats drift past historic docks without shoulder-to-shoulder foot traffic.
In May, the Jangsaengpo Whale Culture Village hosts the Ulsan Whale Festival, celebrating the old whaling harbour’s maritime heritage with waterfront parades and fresh seafood. The atmosphere is warm, neighbourly, and entirely unhurried. For walking the pine-lined trails out to the sea cliffs at Daewangam Park, when the coastal rocks take on a warm amber tone under crisp skies, there is no better stretch of the calendar.
Come June, Ulsan changes character rapidly. Summer arrives not as gentle coastal warmth, but as a dense, sodden weight. By July and August, afternoon temperatures climb to thirty degrees, but the apparent heat feels closer to the mid-thirties once the humidity locks over the bay. Walking outdoors during the middle of the day quickly becomes a drenching chore.
Rainfall peaks viciously across these months. The summer monsoon dumps heavy, plan-ruining downpours that turn riverside promenades slick and obscure the coastal headlands behind grey curtains of mist. When the rain breaks, the sun beats down on the asphalt and the vast industrial estates throw off waves of reflected heat.
Crowds spike somewhat in June before thinning out again in midsummer, but this is largely domestic transit rather than beach holidays. If you find yourself in the city during July or August, limit your explorations to the early mornings or after sunset, when the maritime wind provides modest relief and the illuminated refinery towers take on their strange, sci-fi glow.
September can be an unpredictable transition, frequently catching the tail end of typhoon moisture and torrential rain bursts. But by October, the atmosphere purges completely. The skies clear to an intense, pale blue, rainfall drops dramatically, and the temperature settles into a perfect twenty degrees with crisp, dry air.
October matches May for the title of Ulsan’s best month, but with an earthier, golden palette. Along the Taehwagang River, the vast fields of silver grass turn luminous in the autumn sun. The Taehwagang Reed Festival takes over the riverbank paths during this period, drawing local photographers and walking clubs to the rustling trails. It is an effortlessly relaxed gathering that never tips into chaotic overcrowding.
The coastal rocks at Daewangam Park are buffeted by clear autumn swells, and the visibility stretches for miles out into the Sea of Japan. If you want brisk coastal walks, comfortable afternoons in the park, and completely unbothered urban exploring, October is pristine.
By November, the Siberian winds begin their southern push, dropping temperatures toward the low teens and stripping the foliage bare. Yet November and December register as the busiest period of the entire year on the city’s calendar. Part of this reflects intense year-end corporate commerce, but December’s peak is also driven by a deep-rooted domestic tradition: the annual pilgrimage to the coast.
Travellers flood the eastern headlands, particularly Ganjeolgot, where the first rays of the New Year’s sunrise touch the Korean mainland. Tens of thousands stand bundled in heavy parkas through the biting pre-dawn wind to watch the red sun break over the horizon. It is an atmospheric, culturally resonant spectacle, but as a travel experience, it requires braving sub-zero wind chills.
Once the sunrise crowds disperse in early January, Ulsan settles into a cold, bleak winter slumber that lasts through February and March. Days are bright and relatively dry, but the wind cutting across the industrial docks and through the Taehwagang River valley makes extended sightseeing outside a test of endurance. Unless you are here to stand on the freezing cliffs of Ganjeolgot for the dawn vigil, save your trip for the spring thaw.