Daylight hours in Port Sudan
Port Sudan gets 13h 19m of daylight on its longest day in June, and 10h 57m on its shortest in December — a difference of 2h 21m across the year.
How fast the days change
Around 17 March, Port Sudan gains or loses about 1.1 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 Africa/Khartoum local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 06:08 | 17:12 | 11h 04m | 11:40 |
| February | 05:59 | 17:30 | 11h 31m | 11:45 |
| March | 05:39 | 17:40 | 12h 01m | 11:40 |
| April | 05:13 | 17:48 | 12h 36m | 11:31 |
| May | 04:55 | 17:59 | 13h 04m | 11:27 |
| June | 04:52 | 18:10 | 13h 19m | 11:31 |
| July | 05:01 | 18:13 | 13h 12m | 11:37 |
| August | 05:11 | 17:59 | 12h 48m | 11:35 |
| September | 05:18 | 17:34 | 12h 15m | 11:26 |
| October | 05:25 | 17:08 | 11h 42m | 11:16 |
| November | 05:39 | 16:51 | 11h 13m | 11:15 |
| December | 05:57 | 16:54 | 10h 57m | 11:26 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 05:35 | 17:42 | 12h 07m |
| June solstice | 21 Jun | 04:53 | 18:12 | 13h 19m |
| September equinox | 22 Sep | 05:20 | 17:27 | 12h 08m |
| December solstice | 21 Dec | 06:00 | 16:57 | 10h 57m |
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 Sudan
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.