| Sunrise | Sunset | Daylight | |
|---|---|---|---|
| Today | 06:15 | 18:42 | 12h 27m |
| Tomorrow | 06:14 | 18:42 | 12h 28m |
| Change | −1m | — | +1m |
Positive change in sunset / daylight = days are getting longer. Negative change in sunrise = sun is rising earlier.
Today's light segments for Ulsan. Amber = daylight, violet = twilight, dark = night.
Sunrise and sunset on the 1st of each month in Ulsan.
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 07:33 | 17:21 | 9h 48m |
| February | 07:24 | 17:50 | 10h 26m |
| March | 06:54 | 18:18 | 11h 24m |
| April | 06:11 | 18:44 | 12h 33m |
| May | 05:32 | 19:09 | 13h 37m |
| June | 05:10 | 19:33 | 14h 23m |
| July | 05:11 | 19:43 | 14h 32m |
| August | 05:31 | 19:28 | 13h 57m |
| September | 05:55 | 18:53 | 12h 58m |
| October | 06:18 | 18:09 | 11h 51m |
| November | 06:45 | 17:30 | 10h 45m |
| December | 07:14 | 17:11 | 9h 57m |
Ulsan is located at 35.54°N, 129.31°E. Its latitude determines how dramatically daylight hours change through the year.
The city uses the Asia/Seoul timezone (GMT+9). It does not observe Daylight Saving Time, so solar times shift gradually through the year without abrupt clock changes.
Solar noon — the moment the sun reaches its highest point in the sky — occurs when the sun crosses the local meridian. In Ulsan this falls around 12:21 in mid-summer and 12:13 in December, reflecting UTC offset and any DST adjustments.