Daylight hours in Trondheim
Trondheim gets 20h 30m of daylight on its longest day in June, and 4h 35m on its shortest in December — a difference of 15h 55m across the year.
How fast the days change
Around 21 April, Trondheim gains or loses about 6.4 minutes of daylight every day.
That is quick enough to notice week to week, which is why spring seems to arrive all at once this far from the equator.
Sunrise and sunset by month
On the 15th of each month, in Europe/Oslo local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 09:37 | 15:18 | 5h 41m | 12:27 |
| February | 08:10 | 16:54 | 8h 45m | 12:32 |
| March | 06:36 | 18:18 | 11h 42m | 12:27 |
| April | 05:49 | 20:47 | 14h 59m | 13:18 |
| May | 04:10 | 22:18 | 18h 08m | 13:14 |
| June | 03:03 | 23:34 | 20h 30m | 13:18 |
| July | 03:43 | 23:05 | 19h 22m | 13:24 |
| August | 05:14 | 21:31 | 16h 17m | 13:22 |
| September | 06:42 | 19:44 | 13h 02m | 13:13 |
| October | 08:06 | 18:01 | 9h 55m | 13:04 |
| November | 08:41 | 15:24 | 6h 44m | 12:02 |
| December | 09:55 | 14:31 | 4h 35m | 12:13 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 06:18 | 18:32 | 12h 14m |
| June solstice | 21 Jun | 03:02 | 23:38 | 20h 36m |
| September equinox | 22 Sep | 07:01 | 19:20 | 12h 19m |
| December solstice | 21 Dec | 10:01 | 14:31 | 4h 30m |
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 Norway
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.