Ulsan, South Korea climate
Average temperatures, precipitation and all-time records for Ulsan, South Korea, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 29°C, and its coldest is January, with an average low of -4°C.
Ulsan, officially the Ulsan Metropolitan City, is South Korea's seventh-largest metropolitan city and the eighth-largest city overall, with a population of over 1.1 million inhabitants. It is located in the south-east of the country, neighboring Busan to the south and facing Gyeongju to the north. via Wikipedia
How today compares
Latest recorded day: 2026-10-13. Each reading placed on Ulsan, South Korea's own ±7-day seasonal distribution.
Percentiles marked * are pending verification.
Ulsan average temperatures by month
Typical daily high and low, and average precipitation, for each month in Ulsan, South Korea, based on 1980–2026 records. The wettest month is July (10 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 5°C | -4°C | 0 mm |
| February | 8°C | -2°C | 3 mm |
| March | 12°C | 2°C | 3 mm |
| April | 18°C | 7°C | 3 mm |
| May | 23°C | 12°C | 3 mm |
| June | 26°C | 17°C | 5 mm |
| July | 28°C | 22°C | 10 mm |
| August | 29°C | 22°C | 8 mm |
| September | 25°C | 17°C | 8 mm |
| October | 20°C | 10°C | 3 mm |
| November | 14°C | 3°C | 3 mm |
| December | 7°C | -3°C | 0 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 38°C on 1994-07-20
- Coldest day on record: -18°C on 1981-02-26
Percentiles compare each day to Ulsan, South Korea's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →