The sun, month by month
Sunrise and sunset in Tokyo in September
On September 1 in Tokyo the sun rises at 05:14 and sets at 18:07; on day 30 it rises at 05:37 and sets at 17:24. Over the month the day gets 67 minutes shorter.
Where does the sun rise and set in Tokyo in September?
Mid-September in Tokyo: the sun rises in the east — a bearing of 87°, measured from true north — and sets in the west, at 273°. That is 3° north of due east at sunrise, and the same 3° north of due west at sunset. From the 1st to the last day of the month both points shift 14° 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 Tokyo. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 04:48 | 05:14 | 18:07 | 18:33 | 12 h 53 min |
| 2 | 04:49 | 05:15 | 18:06 | 18:32 | 12 h 51 min |
| 3 | 04:50 | 05:16 | 18:04 | 18:30 | 12 h 49 min |
| 4 | 04:51 | 05:17 | 18:03 | 18:29 | 12 h 46 min |
| 5 | 04:52 | 05:17 | 18:01 | 18:27 | 12 h 44 min |
| 6 | 04:52 | 05:18 | 18:00 | 18:26 | 12 h 42 min |
| 7 | 04:53 | 05:19 | 17:58 | 18:24 | 12 h 39 min |
| 8 | 04:54 | 05:20 | 17:57 | 18:23 | 12 h 37 min |
| 9 | 04:55 | 05:21 | 17:55 | 18:21 | 12 h 35 min |
| 10 | 04:56 | 05:21 | 17:54 | 18:20 | 12 h 33 min |
| 11 | 04:56 | 05:22 | 17:52 | 18:18 | 12 h 30 min |
| 12 | 04:57 | 05:23 | 17:51 | 18:16 | 12 h 28 min |
| 13 | 04:58 | 05:24 | 17:49 | 18:15 | 12 h 26 min |
| 14 | 04:59 | 05:24 | 17:48 | 18:13 | 12 h 23 min |
| 15 | 05:00 | 05:25 | 17:46 | 18:12 | 12 h 21 min |
| 16 | 05:01 | 05:26 | 17:45 | 18:10 | 12 h 19 min |
| 17 | 05:01 | 05:27 | 17:43 | 18:09 | 12 h 16 min |
| 18 | 05:02 | 05:28 | 17:42 | 18:07 | 12 h 14 min |
| 19 | 05:03 | 05:28 | 17:40 | 18:06 | 12 h 12 min |
| 20 | 05:04 | 05:29 | 17:39 | 18:04 | 12 h 09 min |
| 21 | 05:05 | 05:30 | 17:37 | 18:03 | 12 h 07 min |
| 22 | 05:05 | 05:31 | 17:36 | 18:01 | 12 h 05 min |
| 23 | 05:06 | 05:32 | 17:34 | 17:59 | 12 h 02 min |
| 24 | 05:07 | 05:32 | 17:32 | 17:58 | 12 h 00 min |
| 25 | 05:08 | 05:33 | 17:31 | 17:56 | 11 h 58 min |
| 26 | 05:09 | 05:34 | 17:29 | 17:55 | 11 h 55 min |
| 27 | 05:09 | 05:35 | 17:28 | 17:53 | 11 h 53 min |
| 28 | 05:10 | 05:36 | 17:26 | 17:52 | 11 h 51 min |
| 29 | 05:11 | 05:36 | 17:25 | 17:50 | 11 h 49 min |
| 30 | 05:12 | 05:37 | 17:24 | 17:49 | 11 h 46 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 Tokyo runs from 09:00 to 15:00: with medium skin and a t-shirt, ~7 min at the best moment is enough.
See the Tokyo vitamin D guideCommon questions about the sun in Tokyo in September
- Where does the sun set in Tokyo in September?
- Mid-September in Tokyo: the sun sets in the west, a bearing of 273° measured from true north, which is 3° north of due west. It rises in the east, at 87°. Over the month both points shift 14° south.
- How much daylight does Tokyo lose in September?
- Over September the day gets 67 minutes shorter in Tokyo: on September 1 the sun rises at 05:14 and sets at 18:07, and on day 30 it rises at 05:37 and sets at 17:24.
- How many hours of daylight does Tokyo get in September?
- In mid-September the day lasts 12 h 21 min in Tokyo, from sunrise at 05:25 to sunset at 17:46. The table has the day length for each of the 30 days of the month.
- What time does it start to get light in Tokyo in September?
- In mid-September the sky starts to get light at 05:00 in Tokyo, when the sun is 6° below the horizon, and the sun itself does not rise until 05:25. The “Dawn” column of the table gives that time for every day of the month.
- What time does it get dark in Tokyo in September?
- It's not the same time as sunset. In mid-September in Tokyo the sun sets at 17:46, but there is still light: civil twilight does not end until 18:12, 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 Tokyo in September?
- In mid-September, between 09:00 and 15:00: that is the stretch of the day when the UV index reaches 3 in Tokyo, the minimum for the skin to make vitamin D. At the best moment of the day about 7 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.