What time does the sun rise in Buenos Aires in December?

On December 1 it rises at 05:34 and on day 31 at 05:44, always in local time.

How long is the day in Buenos Aires in December?

Around 14 h 28 min at mid-month.

The sun, month by month

Sunrise and sunset in Buenos Aires in December

On December 1 in Buenos Aires the sun rises at 05:34 and sets at 19:53; on day 31 it rises at 05:44 and sets at 20:10. Over the month the day grows 7 minutes longer.

Sunrise05:35

Sunset20:03

Golden hour19:26–20:03

Day length14 h 28 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	05:05	05:34	19:53	20:22	14 h 19 min
2	05:05	05:34	19:54	20:23	14 h 20 min
3	05:05	05:34	19:55	20:24	14 h 21 min
4	05:05	05:34	19:55	20:25	14 h 22 min
5	05:04	05:34	19:56	20:25	14 h 23 min
6	05:05	05:34	19:57	20:26	14 h 23 min
7	05:05	05:34	19:58	20:27	14 h 24 min
8	05:05	05:34	19:59	20:28	14 h 25 min
9	05:05	05:34	19:59	20:29	14 h 25 min
10	05:05	05:34	19:60	20:29	14 h 26 min
11	05:05	05:34	20:01	20:30	14 h 26 min
12	05:05	05:35	20:01	20:31	14 h 27 min
13	05:05	05:35	20:02	20:31	14 h 27 min
14	05:06	05:35	20:03	20:32	14 h 27 min
15	05:06	05:35	20:03	20:33	14 h 28 min
16	05:06	05:36	20:04	20:33	14 h 28 min
17	05:07	05:36	20:04	20:34	14 h 28 min
18	05:07	05:37	20:05	20:34	14 h 28 min
19	05:07	05:37	20:05	20:35	14 h 28 min
20	05:08	05:37	20:06	20:35	14 h 28 min
21	05:08	05:38	20:06	20:36	14 h 29 min
22	05:09	05:38	20:07	20:36	14 h 28 min
23	05:09	05:39	20:07	20:37	14 h 28 min
24	05:10	05:39	20:08	20:37	14 h 28 min
25	05:10	05:40	20:08	20:38	14 h 28 min
26	05:11	05:41	20:08	20:38	14 h 28 min
27	05:12	05:41	20:09	20:38	14 h 28 min
28	05:12	05:42	20:09	20:38	14 h 27 min
29	05:13	05:42	20:09	20:39	14 h 27 min
30	05:14	05:43	20:10	20:39	14 h 26 min
31	05:14	05:44	20:10	20:39	14 h 26 min

Approximate astronomical values: they can shift a minute or two from year to year.

What about vitamin D in December?

In December, the typical synthesis window in Buenos Aires runs from 09:00 to 17:00: with medium skin and a t-shirt, ~5 min at the best moment is enough.

See the Buenos Aires vitamin D guide