The sun, month by month
Sunrise and sunset in Reykjavik in August
On August 1 in Reykjavik the sun rises at 04:35 and sets at 22:32; on day 31 it rises at 06:11 and sets at 20:44. Over the month the day gets 204 minutes shorter.
Sunrise05:21
Sunset21:43
Golden hour20:32–21:43
Day length16 h 22 min
Day by day
All times are local to Reykjavik. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 03:07 | 04:35 | 22:32 | 00:01 | 17 h 57 min |
| 2 | 03:13 | 04:39 | 22:29 | 23:55 | 17 h 50 min |
| 3 | 03:19 | 04:42 | 22:25 | 23:49 | 17 h 43 min |
| 4 | 03:24 | 04:45 | 22:22 | 23:43 | 17 h 36 min |
| 5 | 03:30 | 04:49 | 22:18 | 23:37 | 17 h 30 min |
| 6 | 03:35 | 04:52 | 22:15 | 23:32 | 17 h 23 min |
| 7 | 03:40 | 04:55 | 22:11 | 23:27 | 17 h 16 min |
| 8 | 03:45 | 04:58 | 22:08 | 23:21 | 17 h 09 min |
| 9 | 03:50 | 05:02 | 22:04 | 23:16 | 17 h 03 min |
| 10 | 03:54 | 05:05 | 22:01 | 23:11 | 16 h 56 min |
| 11 | 03:59 | 05:08 | 21:57 | 23:06 | 16 h 49 min |
| 12 | 04:03 | 05:11 | 21:54 | 23:02 | 16 h 42 min |
| 13 | 04:08 | 05:15 | 21:50 | 22:57 | 16 h 35 min |
| 14 | 04:12 | 05:18 | 21:46 | 22:52 | 16 h 29 min |
| 15 | 04:17 | 05:21 | 21:43 | 22:47 | 16 h 22 min |
| 16 | 04:21 | 05:24 | 21:39 | 22:43 | 16 h 15 min |
| 17 | 04:25 | 05:27 | 21:36 | 22:38 | 16 h 08 min |
| 18 | 04:29 | 05:31 | 21:32 | 22:34 | 16 h 01 min |
| 19 | 04:33 | 05:34 | 21:28 | 22:29 | 15 h 54 min |
| 20 | 04:37 | 05:37 | 21:25 | 22:25 | 15 h 48 min |
| 21 | 04:41 | 05:40 | 21:21 | 22:20 | 15 h 41 min |
| 22 | 04:45 | 05:43 | 21:17 | 22:16 | 15 h 34 min |
| 23 | 04:49 | 05:46 | 21:14 | 22:11 | 15 h 27 min |
| 24 | 04:53 | 05:50 | 21:10 | 22:07 | 15 h 20 min |
| 25 | 04:56 | 05:53 | 21:06 | 22:03 | 15 h 14 min |
| 26 | 04:60 | 05:56 | 21:03 | 21:58 | 15 h 07 min |
| 27 | 05:04 | 05:59 | 20:59 | 21:54 | 15 h 00 min |
| 28 | 05:07 | 06:02 | 20:55 | 21:50 | 14 h 53 min |
| 29 | 05:11 | 06:05 | 20:51 | 21:46 | 14 h 46 min |
| 30 | 05:14 | 06:08 | 20:48 | 21:41 | 14 h 40 min |
| 31 | 05:18 | 06:11 | 20:44 | 21:37 | 14 h 33 min |
Approximate astronomical values: they can shift a minute or two from year to year.
What about vitamin D in August?
In August, the typical synthesis window in Reykjavik runs from 12:00 to 16:00: with medium skin and a t-shirt, ~17 min at the best moment is enough.
See the Reykjavik vitamin D guide