Daylight hours in Tehran
Tehran gets 14h 34m of daylight on its longest day in June, and 9h 45m on its shortest in December — a difference of 4h 48m across the year.
How fast the days change
Around 17 March, Tehran gains or loses about 2.3 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 Asia/Tehran local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 07:13 | 17:13 | 10h 00m | 12:13 |
| February | 06:51 | 17:45 | 10h 54m | 12:18 |
| March | 06:15 | 18:11 | 11h 56m | 12:13 |
| April | 05:31 | 18:37 | 13h 06m | 12:04 |
| May | 04:59 | 19:02 | 14h 03m | 12:00 |
| June | 04:47 | 19:21 | 14h 34m | 12:04 |
| July | 04:59 | 19:20 | 14h 21m | 12:10 |
| August | 05:23 | 18:54 | 13h 31m | 12:08 |
| September | 05:46 | 18:12 | 12h 25m | 11:59 |
| October | 06:10 | 17:29 | 11h 19m | 11:50 |
| November | 06:40 | 16:57 | 10h 18m | 11:48 |
| December | 07:06 | 16:52 | 9h 45m | 11:59 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 06:07 | 18:15 | 12h 08m |
| June solstice | 21 Jun | 04:48 | 19:23 | 14h 35m |
| September equinox | 22 Sep | 05:52 | 18:01 | 12h 10m |
| December solstice | 21 Dec | 07:10 | 16:54 | 9h 44m |
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 Iran
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.