Daylight hours in Caloundra
Caloundra gets 13h 49m of daylight on its longest day in December, and 10h 28m on its shortest in June — a difference of 3h 21m across the year.
How fast the days change
Around 17 March, Caloundra gains or loses about 1.6 minutes of daylight every day.
Barely perceptible — near the equator the length of the day hardly changes at all, and the seasons announce themselves through rain and heat instead.
Sunrise and sunset by month
On the 15th of each month, in Australia/Brisbane local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 05:07 | 18:45 | 13h 38m | 11:56 |
| February | 05:31 | 18:31 | 13h 00m | 12:01 |
| March | 05:48 | 18:04 | 12h 16m | 11:56 |
| April | 06:03 | 17:31 | 11h 28m | 11:47 |
| May | 06:19 | 17:08 | 10h 49m | 11:43 |
| June | 06:34 | 17:01 | 10h 28m | 11:47 |
| July | 06:35 | 17:11 | 10h 36m | 11:53 |
| August | 06:17 | 17:26 | 11h 10m | 11:52 |
| September | 05:45 | 17:40 | 11h 55m | 11:42 |
| October | 05:12 | 17:54 | 12h 42m | 11:33 |
| November | 04:49 | 18:14 | 13h 26m | 11:32 |
| December | 04:48 | 18:36 | 13h 49m | 11:42 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 05:50 | 17:59 | 12h 08m |
| June solstice | 21 Jun | 06:35 | 17:02 | 10h 27m |
| September equinox | 22 Sep | 05:37 | 17:43 | 12h 06m |
| December solstice | 21 Dec | 04:50 | 18:40 | 13h 50m |
The equinoxes give almost exactly twelve hours of daylight everywhere on earth — "almost" because sunrise is defined by the sun's upper edge rather than its centre, and the atmosphere bends its light over the horizon before it has really arrived. Both lengthen the day by a few minutes.
Other cities in Australia
Assumptions
- Sea-level horizon. Hills, mountains and buildings all delay sunrise and bring sunset forward, sometimes by a lot in a valley.
- Standard refraction. Sunrise is taken at −0.833°, allowing for the sun's disc and average atmospheric bending. Unusual air conditions shift it by a minute or two.
- Local clock time, with daylight saving applied from the IANA timezone database.