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Ulsan Weather and Climate: A Comprehensive Guide

The temperature in Ulsan can vary greatly throughout the year. The temperatures shift from very warm to cold. It also has a notably wet climate with much precipitation. Now, let’s break down all the climate details for a clearer picture.

Average maximum day and minimum night temperature

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 in August, the warmest time of the year, to a chilly 8°C during cooler months like January.

At night, temperatures typically drop to an average of around -1°C during these months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Ulsan has a relatively rain/snowy climate with high precipitation levels, averaging 1267 mm of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, August receives heavy rainfall, averaging 214 mm of precipitation, recorded across 11 rainy days. In contrast, the drier season, December brings less rainfall, with 29 mm 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

Sunshine over the year

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

Forecast for Ulsan

Wed   Jan 15
3°C | -3°C
NW 5 m/s
clear and no rain

clear and no rain

Thu   Jan 16
6°C | -3°C
W 4 m/s
almost clear and no rain

almost clear and no rain

Fri   Jan 17
8°C | -3°C
SE 3 m/s
clear and no rain

clear and no rain

Select a Month of Interest

Check the conditions for any month of the year.

The best time of year to visit Ulsan in South Korea

During the months of May, June and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Ulsan?
    The hottest season / summer takes place in June, July, August and September.
  • Which months have the greatest rainfall in Ulsan?
    Most rainfall (rainy season) is seen in June, July, August and September.
  • Which is the warmest month in Ulsan?
    August has an average maximum temperature of 30°C and is the warmest month of the year.
  • Which is the coldest month in Ulsan?
    The coldest month is January with an average maximum temperature of 8°C.
  • Which is the wettest month in Ulsan?
    August tops the wettest month list with 214 mm of rainfall.
  • Which is the driest month in Ulsan?
    December is the driest month with 29 mm of precipitation.
  • Which is the sunniest month in Ulsan?
    May is the sunniest month with an average of 217 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.