Longest and shortest day in Perth
In Perth, Australia, the longest day of 2026 is around the December solstice on Monday, 21 December 2026, with 14h 15m of daylight, and the shortest is around the June solstice on Sunday, 21 June 2026, with 10h 3m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:19 | 18:28 | 12h 9m |
| June solstice | Sunday, 21 June 2026 | 07:16 | 17:20 | 10h 3m |
| September equinox | Tuesday, 22 September 2026 | 06:06 | 18:12 | 12h 6m |
| December solstice | Monday, 21 December 2026 | 05:07 | 19:21 | 14h 15m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 05:25 | 19:25 | 14h 1m |
| February | 05:53 | 19:06 | 13h 13m |
| March | 06:15 | 18:34 | 12h 19m |
| April | 06:36 | 17:56 | 11h 19m |
| May | 06:57 | 17:27 | 10h 30m |
| June | 07:14 | 17:19 | 10h 4m |
| July | 07:15 | 17:30 | 10h 15m |
| August | 06:53 | 17:49 | 10h 56m |
| September | 06:15 | 18:08 | 11h 53m |
| October | 05:37 | 18:28 | 12h 51m |
| November | 05:08 | 18:53 | 13h 45m |
| December | 05:04 | 19:18 | 14h 14m |
Why the day gets longer and shorter in Perth
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Perth leans toward the Sun for part of the year and away for the rest. When it leans toward the Sun the days lengthen and the Sun climbs higher; half a year later the opposite happens. The size of the swing depends on how far Perth sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Perth
When is the longest day in Perth?
The longest day in Perth falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 14h 15m of daylight, sunrise at 05:07 and sunset at 19:21.
When is the shortest day in Perth?
The shortest day in Perth falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 10h 3m of daylight, sunrise at 07:16 and sunset at 17:20.
How much does day length change through the year in Perth?
Between the longest and shortest day, Perth gains and loses about 4h 12m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Perth's coordinates with SunCalc, not looked up from a table.