Daylight hours in Red Deer
Red Deer gets 16h 45m of daylight on its longest day in June, and 7h 44m on its shortest in December — a difference of 9h 02m across the year.
How fast the days change
Around 17 March, Red Deer gains or loses about 4.1 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 America/Edmonton local time, daylight saving included.
| Month | Sunrise | Sunset | Daylight | Solar noon |
|---|---|---|---|---|
| January | 08:37 | 16:52 | 8h 15m | 12:44 |
| February | 07:49 | 17:48 | 9h 59m | 12:49 |
| March | 07:48 | 19:39 | 11h 51m | 13:44 |
| April | 06:36 | 20:33 | 13h 56m | 13:35 |
| May | 05:39 | 21:23 | 15h 44m | 13:31 |
| June | 05:13 | 21:58 | 16h 45m | 13:35 |
| July | 05:32 | 21:50 | 16h 18m | 13:41 |
| August | 06:19 | 21:00 | 14h 41m | 13:39 |
| September | 07:10 | 19:50 | 12h 40m | 13:30 |
| October | 08:01 | 18:40 | 10h 40m | 13:20 |
| November | 07:56 | 16:42 | 8h 46m | 12:19 |
| December | 08:38 | 16:22 | 7h 44m | 12:30 |
Solstices and equinoxes
| Date | Sunrise | Sunset | Daylight | |
|---|---|---|---|---|
| March equinox | 20 Mar | 07:36 | 19:48 | 12h 11m |
| June solstice | 21 Jun | 05:13 | 22:00 | 16h 47m |
| September equinox | 22 Sep | 07:21 | 19:33 | 12h 12m |
| December solstice | 21 Dec | 08:42 | 16:24 | 7h 42m |
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 Canada
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.