Climate at a glance · Ulsan
Annual mean14°day and night
Precipitation1352 mma year
Warmest monthAugustavg high 31°
Coldest monthJanuaryavg low -4°
Average temperature by month
High · lowJanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation by month
1352 mm a yearJanFebMarAprMayJunJulAugSepOctNovDec
Monthly averages
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 7° | 9° | 15° | 19° | 23° | 27° | 30° | 31° | 27° | 21° | 16° | 8° |
| Avg low | -4° | -2° | 3° | 8° | 12° | 18° | 23° | 23° | 20° | 12° | 4° | -3° |
| Precip, mm | 30 | 44 | 94 | 82 | 121 | 146 | 228 | 231 | 202 | 97 | 50 | 27 |
| Wet days | 3 | 6 | 9 | 7 | 9 | 12 | 16 | 18 | 15 | 10 | 4 | 2 |
| Sunshine | 8 h | 8.1 h | 8.3 h | 9.2 h | 9.5 h | 8.9 h | 9.4 h | 9.8 h | 7.8 h | 7.7 h | 8.6 h | 8.1 h |
| Humidity | 57% | 58% | 65% | 66% | 69% | 76% | 82% | 82% | 82% | 76% | 69% | 60% |
| Sea temperature | 12° | 10° | 12° | 13° | 15° | 17° | 22° | 25° | 25° | 23° | 18° | 14° |
| Daylight | 10 h 04 | 10 h 54 | 11 h 58 | 13 h 06 | 14 h 02 | 14 h 31 | 14 h 17 | 13 h 28 | 12 h 24 | 11 h 17 | 10 h 19 | 9 h 48 |
| UV index (clear sky) | 4 | 5 | 8 | 10 | 11 | 11 | 11 | 10 | 9 | 6 | 4 | 3 |
5-year averages (2021–2025) · Open-Meteo historical weather (ERA5)
35.5370°N, 129.3170°E