Daylight hours in Whanganui
Whanganui gets 14h 59m of daylight on its longest day in December, and 9h 21m on its shortest in June — a difference of 5h 38m across the year.
How fast the days change
Around 6 April, Whanganui gains or loses about 2.7 minutes of daylight every day.
Enough to notice over a fortnight, though the seasons arrive more gently here than further from the equator.
Sunrise and sunset by month
On the 15th of each month, in Pacific/Auckland local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 06:08 | 20:49 | 14h 41m | 13:29 |
| February | 06:45 | 20:22 | 13h 37m | 13:33 |
| March | 07:17 | 19:40 | 12h 24m | 13:28 |
| April | 06:48 | 17:51 | 11h 03m | 12:19 |
| May | 07:17 | 17:14 | 9h 57m | 12:16 |
| June | 07:39 | 17:00 | 9h 21m | 12:20 |
| July | 07:38 | 17:13 | 9h 35m | 12:25 |
| August | 07:08 | 17:40 | 10h 32m | 12:24 |
| September | 06:21 | 18:09 | 11h 48m | 12:15 |
| October | 06:32 | 19:38 | 13h 06m | 13:05 |
| November | 05:54 | 20:13 | 14h 19m | 13:04 |
| December | 05:45 | 20:44 | 14h 59m | 13:14 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 07:22 | 19:32 | 12h 10m |
| June solstice | 21 Jun | 07:41 | 17:01 | 9h 20m |
| September equinox | 22 Sep | 06:09 | 18:15 | 12h 06m |
| December solstice | 21 Dec | 05:47 | 20:47 | 15h 00m |
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 New Zealand
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.