July 21, 2026 · Cheonan, South Korea
Cheonan has 14h 20m of daylight today. Sunrise is at 05:29 and sunset is at 19:48. All times are calculated astronomically for Cheonan's exact coordinates.
Cheonan lies at 37°N. At this latitude, day length varies moderately — from around 10 hours in midwinter to 14–15 hours in midsummer.
Day length changes fastest near the spring and autumn equinoxes and slowest near the longest day and shortest day of the year. See the year chart to visualise how daylight hours shift month by month for Cheonan, or see daylight hours for every day of the year.
The longest day in Cheonan is around 14h 41m (around June 21). The shortest is around 9h 38m (around December 21). Days are currently getting shorter — losing about 1 minute per day.
| Month | Day length | Sunrise | Sunset |
|---|---|---|---|
| January | 9h 54m | 07:44 | 17:38 |
| February | 10h 50m | 07:21 | 18:12 |
| March | 11h 54m | 06:44 | 18:39 |
| April | 13h 7m | 05:59 | 19:05 |
| May | 14h 7m | 05:25 | 19:32 |
| June | 14h 40m | 05:13 | 19:53 |
| July | 14h 27m | 05:24 | 19:52 |
| August | 13h 36m | 05:49 | 19:25 |
| September | 12h 28m | 06:14 | 18:42 |
| October | 11h 18m | 06:39 | 17:57 |
| November | 10h 14m | 07:10 | 17:24 |
| December | 9h 40m | 07:37 | 17:17 |