The sun, month by month
Sunrise and sunset in Buenos Aires in January
On January 1 in Buenos Aires the sun rises at 05:44 and sets at 20:10; on day 31 it rises at 06:12 and sets at 20:03. Over the month the day gets 35 minutes shorter.
Sunrise05:56
Sunset20:10
Golden hour19:33–20:10
Day length14 h 14 min
Day by day
All times are local to Buenos Aires. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 05:15 | 05:44 | 20:10 | 20:39 | 14 h 25 min |
| 2 | 05:16 | 05:45 | 20:10 | 20:39 | 14 h 25 min |
| 3 | 05:17 | 05:46 | 20:10 | 20:40 | 14 h 24 min |
| 4 | 05:17 | 05:47 | 20:10 | 20:40 | 14 h 24 min |
| 5 | 05:18 | 05:48 | 20:10 | 20:40 | 14 h 23 min |
| 6 | 05:19 | 05:48 | 20:10 | 20:40 | 14 h 22 min |
| 7 | 05:20 | 05:49 | 20:11 | 20:40 | 14 h 21 min |
| 8 | 05:21 | 05:50 | 20:11 | 20:40 | 14 h 21 min |
| 9 | 05:22 | 05:51 | 20:10 | 20:39 | 14 h 20 min |
| 10 | 05:23 | 05:52 | 20:10 | 20:39 | 14 h 19 min |
| 11 | 05:24 | 05:52 | 20:10 | 20:39 | 14 h 18 min |
| 12 | 05:25 | 05:53 | 20:10 | 20:39 | 14 h 17 min |
| 13 | 05:25 | 05:54 | 20:10 | 20:39 | 14 h 16 min |
| 14 | 05:26 | 05:55 | 20:10 | 20:39 | 14 h 15 min |
| 15 | 05:27 | 05:56 | 20:10 | 20:38 | 14 h 14 min |
| 16 | 05:28 | 05:57 | 20:09 | 20:38 | 14 h 12 min |
| 17 | 05:29 | 05:58 | 20:09 | 20:38 | 14 h 11 min |
| 18 | 05:30 | 05:59 | 20:09 | 20:37 | 14 h 10 min |
| 19 | 05:31 | 05:60 | 20:09 | 20:37 | 14 h 09 min |
| 20 | 05:32 | 06:01 | 20:08 | 20:37 | 14 h 07 min |
| 21 | 05:33 | 06:02 | 20:08 | 20:36 | 14 h 06 min |
| 22 | 05:34 | 06:03 | 20:07 | 20:36 | 14 h 05 min |
| 23 | 05:36 | 06:04 | 20:07 | 20:35 | 14 h 03 min |
| 24 | 05:37 | 06:05 | 20:07 | 20:35 | 14 h 02 min |
| 25 | 05:38 | 06:06 | 20:06 | 20:34 | 14 h 00 min |
| 26 | 05:39 | 06:07 | 20:06 | 20:33 | 13 h 59 min |
| 27 | 05:40 | 06:08 | 20:05 | 20:33 | 13 h 57 min |
| 28 | 05:41 | 06:09 | 20:04 | 20:32 | 13 h 56 min |
| 29 | 05:42 | 06:10 | 20:04 | 20:32 | 13 h 54 min |
| 30 | 05:43 | 06:11 | 20:03 | 20:31 | 13 h 53 min |
| 31 | 05:44 | 06:12 | 20:03 | 20:30 | 13 h 51 min |
Approximate astronomical values: they can shift a minute or two from year to year.
What about vitamin D in January?
In January, the typical synthesis window in Buenos Aires runs from 09:00 to 18:00: with medium skin and a t-shirt, ~5 min at the best moment is enough.
See the Buenos Aires vitamin D guide