July 21, 2026 · Londonderry County Borough, Northern Ireland
Londonderry County Borough has 16h 33m of daylight today. Sunrise is at 05:20 and sunset is at 21:53. All times are calculated astronomically for Londonderry County Borough's exact coordinates.
Londonderry County Borough lies at 55°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 Londonderry County Borough, or see daylight hours for every day of the year.
The longest day in Londonderry County Borough is around 17h 22m (around June 21). The shortest is around 7h 10m (around December 21). Days are currently getting shorter — losing about 3 minutes per day.
| Month | Day length | Sunrise | Sunset |
|---|---|---|---|
| January | 7h 44m | 08:47 | 16:31 |
| February | 9h 38m | 07:55 | 17:33 |
| March | 11h 42m | 06:48 | 18:30 |
| April | 14h 1m | 06:30 | 20:31 |
| May | 16h 4m | 05:25 | 21:28 |
| June | 17h 19m | 04:51 | 22:10 |
| July | 16h 52m | 05:09 | 22:02 |
| August | 15h 5m | 06:02 | 21:07 |
| September | 12h 51m | 07:00 | 19:52 |
| October | 10h 38m | 07:57 | 18:35 |
| November | 8h 30m | 08:00 | 16:29 |
| December | 7h 14m | 08:48 | 16:02 |