Vitamin D

The sun, month by month

Sunrise and sunset in Tokyo in August

On August 1 in Tokyo the sun rises at 04:49 and sets at 18:45; on day 31 it rises at 05:13 and sets at 18:09. Over the month the day gets 61 minutes shorter.

Sunrise05:01
Sunset18:30
Golden hour17:55–18:30
Day length13 h 30 min

Where does the sun rise and set in Tokyo in August?

Where it risesEast72°
Where it setsWest288°

Mid-August in Tokyo: the sun rises in the east — a bearing of 72°, measured from true north — and sets in the west, at 288°. That is 18° north of due east at sunrise, and the same 18° north of due west at sunset. From the 1st to the last day of the month both points shift 12° 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.

DayDawnSunriseSunsetDuskDay length
104:2104:4918:4519:1313 h 56 min
204:2204:5018:4419:1213 h 54 min
304:2304:5118:4319:1113 h 53 min
404:2404:5218:4219:1013 h 51 min
504:2504:5218:4119:0913 h 49 min
604:2604:5318:4019:0813 h 47 min
704:2604:5418:3919:0713 h 45 min
804:2704:5518:3819:0613 h 44 min
904:2804:5618:3719:0513 h 42 min
1004:2904:5618:3619:0413 h 40 min
1104:3004:5718:3519:0213 h 38 min
1204:3104:5818:3419:0113 h 36 min
1304:3204:5918:3319:0013 h 34 min
1404:3305:0018:3118:5913 h 32 min
1504:3405:0118:3018:5713 h 30 min
1604:3405:0118:2918:5613 h 28 min
1704:3505:0218:2818:5513 h 26 min
1804:3605:0318:2718:5313 h 24 min
1904:3705:0418:2518:5213 h 21 min
2004:3805:0518:2418:5113 h 19 min
2104:3905:0518:2318:4913 h 17 min
2204:4005:0618:2118:4813 h 15 min
2304:4105:0718:2018:4613 h 13 min
2404:4105:0818:1918:4513 h 11 min
2504:4205:0918:1718:4413 h 09 min
2604:4305:0918:1618:4213 h 06 min
2704:4405:1018:1418:4113 h 04 min
2804:4505:1118:1318:3913 h 02 min
2904:4605:1218:1218:3813 h 00 min
3004:4705:1318:1018:3612 h 58 min
3104:4705:1318:0918:3512 h 55 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 Tokyo runs from 08:00 to 16:00: with medium skin and a t-shirt, ~6 min at the best moment is enough.

See the Tokyo vitamin D guide

Common questions about the sun in Tokyo in August

Where does the sun set in Tokyo in August?
Mid-August in Tokyo: the sun sets in the west, a bearing of 288° measured from true north, which is 18° north of due west. It rises in the east, at 72°. Over the month both points shift 12° south.
How much daylight does Tokyo lose in August?
Over August the day gets 61 minutes shorter in Tokyo: on August 1 the sun rises at 04:49 and sets at 18:45, and on day 31 it rises at 05:13 and sets at 18:09.
How many hours of daylight does Tokyo get in August?
In mid-August the day lasts 13 h 30 min in Tokyo, from sunrise at 05:01 to sunset at 18:30. The table has the day length for each of the 31 days of the month.
What time does it start to get light in Tokyo in August?
In mid-August the sky starts to get light at 04:34 in Tokyo, when the sun is 6° below the horizon, and the sun itself does not rise until 05:01. The “Dawn” column of the table gives that time for every day of the month.
What time does it get dark in Tokyo in August?
It's not the same time as sunset. In mid-August in Tokyo the sun sets at 18:30, but there is still light: civil twilight does not end until 18:57, 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 August?
In mid-August, between 08:00 and 16:00: 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 6 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.