July 21, 2026 · Merthyr Tydfil, Wales
Merthyr Tydfil has 15h 60m of daylight today. Sunrise is at 05:21 and sunset is at 21:20. All times are calculated astronomically for Merthyr Tydfil's exact coordinates.
Merthyr Tydfil lies at 52°N. At this latitude, day length varies significantly through the year — from roughly 7–8 hours in midwinter to 16–17 hours at 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 Merthyr Tydfil, or see daylight hours for every day of the year.
The longest day in Merthyr Tydfil is around 16h 41m (around June 21). The shortest is around 7h 47m (around December 21). Days are currently getting shorter — losing about 3 minutes per day.
| Month | Day length | Sunrise | Sunset |
|---|---|---|---|
| January | 8h 16m | 08:15 | 16:31 |
| February | 9h 55m | 07:31 | 17:26 |
| March | 11h 44m | 06:31 | 18:16 |
| April | 13h 48m | 06:21 | 20:08 |
| May | 15h 35m | 05:23 | 20:58 |
| June | 16h 38m | 04:55 | 21:34 |
| July | 16h 16m | 05:12 | 21:28 |
| August | 14h 44m | 05:57 | 20:41 |
| September | 12h 46m | 06:47 | 19:33 |
| October | 10h 48m | 07:36 | 18:24 |
| November | 8h 55m | 07:31 | 16:27 |
| December | 7h 50m | 08:14 | 16:04 |