Year-round weather and climate in Ulsan, South Korea
Average temperatures in Ulsan run from an average low of -3°C27°F in January up to an average high of 30°C86°F in August. December is the driest month at 2 rainy days; July the wettest at 19. Here is the annual climate data, so you know what you are packing for.
Good to know
- Population
- 1.1M
- Currency
- KRW
- Language
- Korean
- Time zone
- Seoul
Best time to visit
The most pleasant weather falls in April, May, and June, offering a perfect balance of comfortable temperatures and clear skies.
Rain character
Tropical Downpours: Expect intense bursts of rain during wetter months. Pack quick-drying footwear and a compact umbrella.
Day-to-night swing
The Daypack Trap: Beware the "noon illusion". In months like March, crisp sunny days drop off a cliff by 12°C22°F at sunset. Always carry an evening layer.
Seasonality Profile
True Four Seasons: Dramatic contrasts. Freezing winters, transitional shoulders, and blazing summers.
Evening vibe
Cozy Indoor Culture: Evenings are generally crisp, damp, or sweltering. Nightlife centers around indoor venues.
Sightseeing stamina
All-Day Strolling: Weather is generally forgiving for long walking days. Comfortable sneakers are your most important packing item.
Average temperatures, sunshine, and rainfall
Average monthly weather in Ulsan, based on recent historical data. Essential insights on temperature swings, expected rainfall, and daily sunshine.
Bars span the average daily low to high. Dec is typically driest at 2 days (24mm); Jul the wettest at 19 days (297mm).
| Month | Average high | Average low | Sunshine hours | Rainy days | Total rainfall |
|---|---|---|---|---|---|
| Jan | 7°C / 45°F | -3°C / 26°F | 8h | 5 | 55mm |
| Feb | 10°C / 49°F | -1°C / 30°F | 8h | 7 | 53mm |
| Mar | 15°C / 58°F | 3°C / 37°F | 8h | 8 | 87mm |
| Apr | 19°C / 66°F | 7°C / 45°F | 9h | 7 | 86mm |
| May | 23°C / 74°F | 12°C / 54°F | 10h | 9 | 112mm |
| Jun | 27°C / 80°F | 18°C / 64°F | 9h | 12 | 174mm |
| Jul | 29°C / 84°F | 22°C / 72°F | 8h | 19 | 297mm |
| Aug | 30°C / 86°F | 23°C / 74°F | 10h | 18 | 237mm |
| Sep | 26°C / 78°F | 19°C / 66°F | 8h | 15 | 230mm |
| Oct | 21°C / 70°F | 11°C / 52°F | 8h | 7 | 69mm |
| Nov | 16°C / 60°F | 4°C / 40°F | 8h | 4 | 50mm |
| Dec | 8°C / 46°F | -3°C / 27°F | 8h | 2 | 24mm |
Weather data by Open-Meteo.com (opens in a new tab)
Frequently Asked Questions
When is the sunniest time of year to visit Ulsan?
The most sunshine in Ulsan comes around May, averaging 10 hours a month. If you're heading there then, pack your sunglasses and sunscreen.
What clothes should I pack for Ulsan?
Your packing list depends entirely on when you travel. Temperatures in Ulsan swing from an average low of -3°C27°F in January up to 30°C86°F in August. The Packola app builds a tailored packing list for you based on the live weather forecast for your exact travel dates.
Do I need to pack an umbrella for Ulsan?
Ulsan gets rain on about 113 days out of the year. The wettest month is July. If you're traveling during the rainy season, you'll definitely want to pack an umbrella and a light rain jacket.
Pack smarter.
Averages get you close, but the week you travel is what matters. Get the live forecast, a smart packing list, and discover the best local spots and activities in Ulsan with Packola.
Get the app