Ulsan Weather & Climate: Best Time to Visit

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

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

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

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