Ulsan weather by month & the best time to visit
🇰🇷 South Korea · coastal city break · humid subtropical climate
The best time to visit Ulsan is October — its sunniest month (Sunshine Score 76/100), with May close behind. Ulsan averages about 1,954 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 76 mm of rain in October.
Jump to: month-by-month table · sea temperature · nearby alternatives · embed this data
- Sun hours / year
- 1,954
- Sunniest month
- October
- Peak score
- 76/100
- Rain / year
- 1,323 mm
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 28°C / 82°F
- Population
- 1.1M
- Elevation
- 10 m
When is the best time to visit Ulsan?
For sunshine, the best time to visit Ulsan is October, then May. The dullest month is January (0/100, 42 mm of rain). The full month-by-month picture is in the table below.
How sunny is Ulsan?
Ulsan gets a moderate 1,954 hours of sunshine a year. 76 Sunshine Score points separate October (76) from January (0), so the month you pick matters. It ranks #8 of 14 destinations in South Korea for annual sunshine, below the national median of 1,959 hours. Rain has a clear season: the wettest stretch, around August, carries about 46% of the annual 1,323 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 6° / 43°F | 0° / 32°F | 42 mm | 2 | 13° / 55°F |
| February | 0 | 8° / 46°F | 2° / 36°F | 53 mm | 3 | 13° / 55°F |
| March | 25 | 12° / 54°F | 5° / 41°F | 74 mm | 4 | 13° / 55°F |
| April | 52 | 17° / 63°F | 10° / 50°F | 112 mm | 5 | 15° / 59°F |
| May | 68 | 21° / 70°F | 14° / 57°F | 118 mm | 6 | 17° / 63°F |
| June | 63 | 24° / 75°F | 19° / 66°F | 150 mm | 6 | 20° / 68°F |
| July | 63 | 27° / 81°F | 23° / 73°F | 240 mm | 6 | 20° / 68°F |
| August | 63 | 28° / 82°F | 24° / 75°F | 194 mm | 7 | 28° / 82°F |
| September | 63 | 25° / 77°F | 21° / 70°F | 168 mm | 5 | 28° / 82°F |
| October | 76 | 20° / 68°F | 15° / 59°F | 76 mm | 4 | 23° / 73°F |
| November | 47 | 15° / 59°F | 9° / 48°F | 54 mm | 2 | 19° / 66°F |
| December | 0 | 8° / 46°F | 2° / 36°F | 42 mm | 2 | 14° / 57°F |
Sea temperature in Ulsan by month
The sea off Ulsan is warmest in August at around 28°C / 82°F, and coolest in January at 13°C / 55°F. The water sits at a comfortable 21°C or warmer roughly 3 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Ulsan on the interactive sunshine globe →
Nearby places for sunshine
- Busan South Korea · 59 km · best in Oct · 2,112 h sun/yr
- Daegu South Korea · 71 km · best in Oct · 2,111 h sun/yr
- Yeosu South Korea · 178 km · best in Oct · 2,024 h sun/yr
- Cheongju South Korea · 208 km · best in May · 1,963 h sun/yr
- Gwangju South Korea · 237 km · best in Oct · 1,884 h sun/yr
- Fukuoka Japan · 245 km · best in Oct · 1,752 h sun/yr
Nearest destinations
- Pohang South Korea · 44 km · 1,954 h sun/yr · best in Oct
- Sacheon South Korea · 129 km · 2,112 h sun/yr · best in Oct
- Tsushima Japan · 146 km · 1,900 h sun/yr · best in Oct
Head-to-head
How Ulsan compares month by month: Ulsan vs Busan · Ulsan vs Daegu · Ulsan vs Yeosu · all comparisons
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