Weather in Ulsan, South Korea 🇰🇷
Live weather in Ulsan, currently 23°C with overcast. View the 7-day forecast, hourly conditions, and air quality index. Ulsan is in South Korea — see weather across all major cities in South Korea, or browse the hottest cities right now worldwide.
22.6°C
feels like 20.4°C
Overcast
Current Weather in Ulsan, South Korea Updated at 10:45 PM yesterday
| 💧 Humidity: | 64% |
| 🌬️ Wind: | 20.2 kph (45°) |
| 🌡️ Pressure: | 1013.0 mb |
| 👁️ Visibility: | 10.0 km |
| 🌧️ Precipitation: | 0.0 mm |
| ☁️ Cloud Cover: | 100% |
| ☀️ UV Index: | 0.0 |
| 🌅 Sunrise: | 05:58 AM |
| 🌇 Sunset: | 06:44 PM |
What is the weather like in Ulsan right now?
A balmy 23°C after dark in Ulsan, with overcast skies. Overcast conditions have muted the sun. Real-feel sits just under, around 20°C. Expect a 20 kph breeze from the west.
Air quality is good right now (US EPA index 1, PM2.5 7) — fine for outdoor exercise. Sunrise was 05:58 AM, sunset is 06:44 PM: 12h 46m of light in Ulsan.
There's a 36% chance of rain today, with around 1 mm forecast. It should stay dry through the next 24 hours. That's right in line with the usual September average for Ulsan.
Cooler air moves in later, with Friday down near 22°C. Today's high stays well short of Ulsan's record for the date, 32°C.
Bottom line: it's a great day to be outside in Ulsan.
7-Day Weather Forecast for Ulsan, South Korea 🇰🇷
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Hourly Weather Forecast for Ulsan, South Korea 🇰🇷 Today
Air Quality Index in Ulsan, South Korea 🇰🇷 (AQI)
US EPA Index
Environmental Protection Agency
UK DEFRA Index
Department for Environment, Food & Rural Affairs
| Parameter | Value |
|---|---|
| US EPA Index: | 1 (Good) |
| UK DEFRA Index: | 1 (Low) |
| CO: | 136.0 µg/m³ |
| O3: | 78.0 µg/m³ |
| NO2: | 9.1 µg/m³ |
| SO2: | 3.4 µg/m³ |
| PM2.5: | 7.1 µg/m³ |
| PM10: | 10.6 µg/m³ |
About Ulsan
Ulsan, South Korea’s industrial heart, blends the grit of shipyards and refineries with unexpected pockets of nature. Nestled in the southeastern corner of the country, the city hugs the coast of the East Sea, backed by low mountains. The Taehwa River meanders through the center, offering riverside parks and cycling paths, while the iconic Ganjeolgot Cape draws sunrise seekers. Despite its population of over a million, Ulsan lacks the frantic pace of Seoul or the tourist crowds of Busan. Here, the skyline is dominated by Hyundai’s sprawling plants, but the vibe remains surprisingly laid-back. The city’s geography—where urban industry gives way to pine forests and coastal cliffs—creates a unique, understated charm.
Under the Köppen classification, Ulsan has a humid subtropical climate (Cfa). Summers are hot and sticky, with temperatures hovering around 25–30°C from June to August, while the monsoon season dumps relentless rain between late June and July. Humidity can feel oppressive, so breathable fabrics and a sturdy umbrella are essential. Winters are milder than in Seoul, with daytime highs near 8°C and lows just below freezing. Snowfall is light, usually a few dustings a year, but a warm coat and layers suffice. Spring and autumn bring the most comfortable weather—mild, with occasional rainfall and moderate humidity. Packing for a trip means preparing for humidity in summer and chilly breezes in winter.
The best time to visit Ulsan weather-wise is during spring (April–May) or autumn (September–October), when temperatures are pleasant and skies often clear. Notable phenomena include the East Asian monsoon, which peaks in July with heavy, persistent rains, and late-summer typhoons that can brush the coast with strong winds and downpours. Winter occasionally sees a blast of Siberian cold, but Ulsan’s coastal position moderates extremes. In spring, sea fog sometimes rolls in from the East Sea, shrouding the city in a damp, dreamy mist. These quirks add character to a destination that thrives on contrast—industry and nature, rain and shine.
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