Historical weather in Ulsan, South Korea
Ulsan weather history for 2023-2025, with daily temperatures, precipitation, monthly summaries, and records from Open-Meteo archive data.
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Weather summary
Across 2023-2025, Ulsan averaged 19.8 C for daily highs and 9.5 C for daily lows across 1096 daily observations.
The warmest month was July 2025, with an average high of 33.0 C, while February 2025 had the lowest average low at -4.4 C.
The wettest month was May 2023, totaling 223.9 mm of precipitation.
The hottest day reached 39.7 C on July 3, 2025; the coldest night fell to -13.1 C on January 25, 2023.
Monthly summary table
| Year | Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|---|
| 2023 | January | -3.8 | 7.2 | 61.2 | 31 |
| 2023 | February | -1.2 | 10.4 | 42.6 | 28 |
| 2023 | March | 4.1 | 17.1 | 67.7 | 31 |
| 2023 | April | 7.9 | 19.2 | 72.9 | 30 |
| 2023 | May | 12.3 | 22.5 | 223.9 | 31 |
| 2023 | June | 17.8 | 27.0 | 195.7 | 30 |
| 2023 | July | 22.2 | 29.5 | 221.3 | 31 |
| 2023 | August | 23.1 | 30.2 | 222.1 | 31 |
| 2023 | September | 19.4 | 26.7 | 188.9 | 30 |
| 2023 | October | 9.2 | 21.5 | 4.7 | 31 |
| 2023 | November | 2.2 | 15.0 | 34.5 | 30 |
| 2023 | December | -1.9 | 9.1 | 97.8 | 31 |
| 2024 | January | -3.5 | 7.6 | 48.4 | 31 |
| 2024 | February | 1.0 | 10.0 | 112.5 | 29 |
| 2024 | March | 1.0 | 12.7 | 110.4 | 31 |
| 2024 | April | 8.3 | 19.7 | 112.9 | 30 |
| 2024 | May | 10.7 | 23.3 | 93.2 | 31 |
| 2024 | June | 17.0 | 28.0 | 161.2 | 30 |
| 2024 | July | 23.5 | 30.8 | 160.1 | 31 |
| 2024 | August | 23.8 | 31.9 | 83.5 | 31 |
| 2024 | September | 21.2 | 28.3 | 206.9 | 30 |
| 2024 | October | 13.2 | 21.6 | 213.1 | 31 |
| 2024 | November | 5.8 | 15.5 | 95.7 | 30 |
| 2024 | December | -3.0 | 7.3 | 0.9 | 31 |
| 2025 | January | -4.1 | 6.8 | 6.7 | 31 |
| 2025 | February | -4.4 | 6.3 | 22.1 | 28 |
| 2025 | March | 2.0 | 14.2 | 78.0 | 31 |
| 2025 | April | 6.5 | 20.0 | 56.2 | 30 |
| 2025 | May | 11.4 | 22.2 | 131.5 | 31 |
| 2025 | June | 18.0 | 29.1 | 142.9 | 30 |
| 2025 | July | 22.9 | 33.0 | 193.1 | 31 |
| 2025 | August | 23.5 | 32.9 | 154.2 | 31 |
| 2025 | September | 20.5 | 28.2 | 128.4 | 30 |
| 2025 | October | 14.2 | 21.1 | 164.6 | 31 |
| 2025 | November | 2.8 | 15.8 | 29.1 | 30 |
| 2025 | December | -2.1 | 9.6 | 22.0 | 31 |
Daily weather records
| Record | Date | Value |
|---|---|---|
| Hottest day | July 3, 2025 | 39.7 C |
| Coldest night | January 25, 2023 | -13.1 C |
| Wettest day | September 21, 2024 | 125.0 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.