Ulsan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ulsan.
Climate overview of Ulsan
Ulsan, Chungcheongbuk-Do, South Korea, experiences significant temperature variation throughout the year. Summers bring daytime highs of 30°C (86°F) in August, while winters cool to 8°C (46°F) in January.
Rain/snowfall is high, totalling around 1267 mm (50 in) per year. August is the wettest month and December the driest. The city also experiences distinct dry (December to January) and wet (July to September) seasons, with very warm summers and cold winters. The sunniest month is May, with 7.2 hours of sunshine per day on average.
Ulsan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ulsan - and find the best time to visit.
Monthly Temperature in Ulsan
Depending on the time of the year, temperatures range from very warm to chilly in Ulsan. Average maximum daytime temperatures range from a very warm 30°C (86°F) in August, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.
At night, you can expect temperatures ranging from 24°C (75°F) in August to around -1°C (30°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ulsan
Ulsan has a relatively rain/snowy climate with high precipitation levels, averaging 1267 mm (50 in) of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, August it receives heavy rainfall, averaging 214 mm (8.4 in) of precipitation, recorded across 11 rainy days. In contrast, the driest month December brings less rainfall, with 29 mm (1.1 in) over 5 rainy days. For more details, please visit our Ulsan Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Ulsan
While the amount of sunshine in Ulsan varies throughout the year, all seasons offer their own charm. Enjoy up to 7.2 hours of daily sun in May, and experience slightly darker atmosphere in July, with about 5.1 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Ulsan by Month
The relative humidity is high throughout the year in Ulsan.
The city experiences its highest humidity in July, reaching 77%. In January, the humidity drops to its lowest level at 48%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Ulsan
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: October
- Warmest weather: July and August
- Most sunshine: April and May
- Fewest rainy days: January, November and December
- Wettest months: June, July, August and September, when rainfall is highest.
- Seasonal pattern: Distinct dry (December to January) and wet (July to September) seasons, with very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -1°C (30°F).
Frequently asked questions about the climate in Ulsan
What is the best time to visit Ulsan?
October typically offers the most optimal weather in Ulsan. In contrast, January, February and August tend to have less optimal conditions. Ulsan has distinct dry (December to January) and wet (July to September) seasons, with very warm summers and cold winters.
What temperatures can I expect in Ulsan?
Daytime highs range from 8°C (46°F) in January to 30°C (86°F) in August. Nighttime lows range from -1°C (30°F) to 24°C (75°F). Temperatures vary considerably through the year.
How much rain does Ulsan get?
Annual rainfall is around 1267 mm (50 in). August is the wettest month with 214 mm (8.4 in), while December is the driest with 29 mm (1.1 in).
How sunny is Ulsan?
Ulsan receives around 2,203 hours of sunshine per year. May is the sunniest month with 217 hours, while July is the cloudiest with just 152 hours. Overall, Ulsan enjoys abundant sunshine.
Ulsan 3-Day Forecast
Ulsan on the map
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