The sun, month by month
Sunrise and sunset in London in September
On September 1 in London the sun rises at 06:15 and sets at 19:45; on day 30 it rises at 07:04 and sets at 18:36. Over the month the day gets 117 minutes shorter.
Where does the sun rise and set in London in September?
Mid-September in London: the sun rises in the east — a bearing of 85°, measured from true north — and sets in the west, at 275°. That is 5° north of due east at sunrise, and the same 5° north of due west at sunset. From the 1st to the last day of the month both points shift 19° south.
Approximate bearings: they can be a couple of degrees out. They are measured from true north, not the north a phone compass points to.
Day by day
All times are local to London. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 05:41 | 06:15 | 19:45 | 20:20 | 13 h 30 min |
| 2 | 05:42 | 06:17 | 19:42 | 20:17 | 13 h 26 min |
| 3 | 05:44 | 06:19 | 19:40 | 20:15 | 13 h 22 min |
| 4 | 05:46 | 06:20 | 19:38 | 20:12 | 13 h 18 min |
| 5 | 05:48 | 06:22 | 19:35 | 20:10 | 13 h 14 min |
| 6 | 05:49 | 06:24 | 19:33 | 20:07 | 13 h 09 min |
| 7 | 05:51 | 06:25 | 19:31 | 20:05 | 13 h 05 min |
| 8 | 05:53 | 06:27 | 19:28 | 20:02 | 13 h 01 min |
| 9 | 05:55 | 06:29 | 19:26 | 20:00 | 12 h 57 min |
| 10 | 05:56 | 06:30 | 19:24 | 19:57 | 12 h 53 min |
| 11 | 05:58 | 06:32 | 19:21 | 19:55 | 12 h 49 min |
| 12 | 06:00 | 06:34 | 19:19 | 19:52 | 12 h 45 min |
| 13 | 06:02 | 06:35 | 19:16 | 19:50 | 12 h 41 min |
| 14 | 06:03 | 06:37 | 19:14 | 19:48 | 12 h 37 min |
| 15 | 06:05 | 06:38 | 19:12 | 19:45 | 12 h 33 min |
| 16 | 06:07 | 06:40 | 19:09 | 19:43 | 12 h 29 min |
| 17 | 06:08 | 06:42 | 19:07 | 19:40 | 12 h 25 min |
| 18 | 06:10 | 06:43 | 19:04 | 19:38 | 12 h 21 min |
| 19 | 06:12 | 06:45 | 19:02 | 19:35 | 12 h 17 min |
| 20 | 06:13 | 06:47 | 19:00 | 19:33 | 12 h 13 min |
| 21 | 06:15 | 06:48 | 18:57 | 19:30 | 12 h 09 min |
| 22 | 06:17 | 06:50 | 18:55 | 19:28 | 12 h 05 min |
| 23 | 06:19 | 06:52 | 18:52 | 19:26 | 12 h 01 min |
| 24 | 06:20 | 06:53 | 18:50 | 19:23 | 11 h 57 min |
| 25 | 06:22 | 06:55 | 18:48 | 19:21 | 11 h 52 min |
| 26 | 06:24 | 06:57 | 18:45 | 19:18 | 11 h 48 min |
| 27 | 06:25 | 06:58 | 18:43 | 19:16 | 11 h 44 min |
| 28 | 06:27 | 07:00 | 18:41 | 19:14 | 11 h 40 min |
| 29 | 06:29 | 07:02 | 18:38 | 19:11 | 11 h 36 min |
| 30 | 06:30 | 07:04 | 18:36 | 19:09 | 11 h 32 min |
Approximate astronomical values: they can shift a minute or two from year to year.
What about vitamin D in September?
In September, the typical synthesis window in London runs from 12:00 to 15:00: with medium skin and a t-shirt, ~15 min at the best moment is enough.
See the London vitamin D guideCommon questions about the sun in London in September
- Where does the sun set in London in September?
- Mid-September in London: the sun sets in the west, a bearing of 275° measured from true north, which is 5° north of due west. It rises in the east, at 85°. Over the month both points shift 19° south.
- How much daylight does London lose in September?
- Over September the day gets 117 minutes shorter in London: on September 1 the sun rises at 06:15 and sets at 19:45, and on day 30 it rises at 07:04 and sets at 18:36.
- How many hours of daylight does London get in September?
- In mid-September the day lasts 12 h 33 min in London, from sunrise at 06:38 to sunset at 19:12. The table has the day length for each of the 30 days of the month.
- What time does it start to get light in London in September?
- In mid-September the sky starts to get light at 06:05 in London, when the sun is 6° below the horizon, and the sun itself does not rise until 06:38. The “Dawn” column of the table gives that time for every day of the month.
- What time does it get dark in London in September?
- It's not the same time as sunset. In mid-September in London the sun sets at 19:12, but there is still light: civil twilight does not end until 19:45, when the sun reaches 6° below the horizon and usable outdoor light runs out. The “Dusk” column of the table gives that time day by day.
- What time of day can you make vitamin D in London in September?
- In mid-September, between 12:00 and 15:00: that is the stretch of the day when the UV index reaches 3 in London, the minimum for the skin to make vitamin D. At the best moment of the day about 15 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.