Will it be clear for stargazing in Tokyo tonight?

Mostly cloudy; the Moon (38% lit) rises at 23:24. That is the hourly total-cloud forecast for Tokyo, Japan on the night of 4 October 2026, read inside the darkest hours: under 25% cloud counts as clear and 65% or more as cloudy.

When does it get dark in Tokyo tonight?

In Tokyo, Japan on the night of 4 October 2026, astronomical darkness begins at 18:46 and lasts until 04:14 GMT+9 — 9 h 28 min of fully dark sky. The Sun sets at 17:21, and nautical twilight ends at 18:16.

Is the Moon up tonight in Tokyo?

On the night of 4 October 2026 in Tokyo, Japan, the Moon is a waning crescent, 38% illuminated. It sets at 13:33 and rises at 23:24, GMT+9. 4 h 40 min of the dark window is moon-free.

Which planets can I see from Tokyo tonight?

From Tokyo, Japan on the night of 4 October 2026: Mars (01:06–04:14, highest 48° in the E at 04:14, magnitude 1.1); Jupiter (02:26–04:14, highest 32° in the E at 04:14, magnitude -1.9); Saturn (18:46–04:14, highest 56° in the S at 23:36, magnitude 0.2). Times are GMT+9; all are visible to the naked eye.

Stargazing forecast

Stargazing forecast for Tokyo, Japan

Sun 4 Oct night
35.690° N, 139.692° E
44 m
GMT+9 · Asia/Tokyo

Open the live forecast — sky score, seeing, 7 nights

Tonight at a glance

Mostly cloudy; the Moon (38% lit) rises at 23:24.

Updated 08:20 GMT+9 (3 Oct, 23:20 UTC) · MET Norway forecast issued 3 Oct, 19:21 UTC

Cloud cover: 90%Cloudy
Dark hours: 9 h 28 min18:46–04:14
Moon: 38%4 h 40 min moon-free
Wind: 15 km/hLight
Low temperature: 16°CDuring the dark hours
Dew risk: ModerateAir comes within 2° of the dew point

Photo: Milky Way over Paranal — ESO/A. Ghizzi Panizza (www.albertoghizzipanizza.com), CC BY 4.0

Hourly forecast

Cloud by layer, hour by hour. Darker blue means clearer sky; each cell shows its percentage. Low cloud blocks the sky outright; thin high cloud only dims it.

Hourly cloud cover (%) and conditions tonight in Tokyo
GMT+9	Sun 4									Mon 5																								Tue 6
Hour	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04	05	06
Sky: Daylight 15–17, Civil twilight 17–18, Astronomical twilight 18–19, Dark 19–04, Astronomical twilight 04–05, Civil twilight 05–06, Daylight 06–17, Civil twilight 17–18, Astronomical twilight 18–19, Dark 19–04, Astronomical twilight 04–05, Civil twilight 05–06, Daylight 06–07
Total cloud	97	81	100	98	98	99	98	98	93	89	84	75	53	99	91	100	100	100	100	100	100	100	100	86	92	100	97	100	100	100	100	100	100	100	100	100	96	93	90	100
Low cloud	30	6	6	6	13	13	8	2	6	9	8	11	33	1	6	1	18	95	100	99	100	100	100	73	68	99	77	99	99	99	100	100	100	100	99	99	91	65	7	16
Mid cloud	23	38	95	61	52	89	84	92	91	87	81	72	29	98	55	99	100	100	100	99	73	58	44	48	45	100	95	100	100	92	41	4	4	6	0	0	0	0	0	0
High cloud	95	73	100	98	98	97	91	83	8	27	15	0	3	81	88	92	91	90	84	98	80	100	14	0	58	40	55	25	22	0	0	6	43	66	67	95	75	81	89	99
Sun & Moon
Temperature °C	21	21	20	19	19	18	18	18	17	17	17	17	16	16	16	16	17	17	18	19	19	21	20	21	21	20	20	20	20	19	19	19	19	19	19	19	19	19	19	19
Dew point °C	13	13	14	14	15	15	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	16	16	17	17	17	17	17	17	17	16	16	16	16	16	16	15	15
Wind km/h	14	15	17	15	14	14	13	13	13	14	15	16	17	17	17	18	17	17	19	18	17	17	17	17	16	16	15	15	15	15	16	16	15	15	13	14	14	14	14	15
Rain (mm)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover0–9%10–24%25–44%45–64%65–84%85–100%

SkyDaylightCivil twilightNautical twilightAstronomical twilightDark

Sun altitudeMoon altitude12dew risk (within 2° of the dew point)Scroll sideways for the next 40 hours →

Weather data: MET Norway (CC BY 4.0)

Next 7 nights

Average cloud during each night's dark hours, with the Moon. The first two to three nights use hourly data; later nights use MET Norway's 6-hourly steps and are less certain.

Tonight4 Oct
90%Cloudy
38% · 4 h 40 min moon-free
18:46–04:14
Mon5 Oct
99%Cloudy
28% · 5 h 50 min moon-free
18:44–04:15
Tue6 Oct
10%Clear
18% · 7 h moon-free
18:43–04:15
6-hourly data
Wed7 Oct
15%Clear
11% · 8 h 10 min moon-free
18:41–04:16
6-hourly data
Thu8 Oct
4%Clear
5% · 9 h 20 min moon-free
18:40–04:17
6-hourly data
Fri9 Oct
18%Clear
1% · 9 h 39 min moon-free
18:39–04:18
6-hourly data
Sat10 Oct
2%Clear
0% · 9 h 41 min moon-free
18:37–04:19
6-hourly data

Sun & twilight

Twilight ends in three steps. Faint galaxies and the Milky Way need astronomical darkness, when the Sun is more than 18° below the horizon.

Sunset: 17:21
Civil dusk (−6°): 17:46
Nautical dusk (−12°): 18:16
Astronomical dusk (−18°): 18:46
Astronomical dawn (−18°): 04:14
Nautical dawn (−12°): 04:43
Civil dawn (−6°): 05:13
Sunrise: 05:38

Dark window: 18:46 – 04:14 GMT+9 (9 h 28 min)

The Moon

Waning Crescent

Illuminated: 38%
Age: 22.6 days
Moonrise: 23:24
Moonset: 13:33
Moon-free dark time: 4 h 40 min

Next phases

New MoonSun 11 Oct00:50
First QuarterMon 19 Oct01:13
Full MoonMon 26 Oct13:12
Last QuarterMon 2 Nov05:28

Next lunar eclipse visible here: Partial · Fri 7 Jul 2028, 03:19 · Moon 12° up
Next solar eclipse visible here: Partial · Sat 1 Jun 2030, 17:07 · 72% of the Sun covered

Planets tonight

Naked-eye planets that climb more than 10° above the horizon during the astronomically dark hours.

Altitude through the night

Planets tonight — Tokyo
Planet	Rises	Transits (altitude)	Sets	Best seen tonight	Brightness	In
JupiterVisible	01:30	08:18 · 70°	15:08	02:26–04:14, E	mag -1.9	Leo
SaturnVisible	17:26	23:33 · 56°	05:41	18:46–04:14, S	mag 0.2	Cetus
MarsVisible	00:08	07:12 · 75°	14:19	01:06–04:14, E	mag 1.1	Cancer
Venus	08:02	13:04 · 33°	18:01	Below 10°	mag -4.7	Virgo
Mercury	07:40	12:56 · 39°	18:14	Below 10°	mag -0.1	Virgo

Lower magnitude = brighter. Venus and Jupiter outshine every star.

Sky events — next 90 days

Moon phases, seasons, planet highlights and eclipses, with times for this city.

Oct4Sun
Planet · 21:12
Saturn at opposition
Saturn is opposite the Sun: up all night, and at its closest and brightest for the year.
Oct11Sun
Moon · 00:50
New Moon
Darkest skies of the month for galaxies and the Milky Way.
Oct12Mon
Planet · 19:06
Mercury at greatest evening elongation
25° from the Sun — the best evening view of Mercury, low in the west after sunset.
Oct26Mon
Moon · 13:12
Full Moon
Bright moonlight all night; best for the Moon itself.
Oct29Thu
Moon · 03:04
Moon at perigee near full (a “supermoon”)
Closest to Earth this month: 364,397 km.
Nov9Mon
Moon · 16:02
New Moon
Darkest skies of the month for galaxies and the Milky Way.
Nov24Tue
Moon · 23:54
Full Moon
Bright moonlight all night; best for the Moon itself.
Nov26Thu
Moon · 06:02
Moon at perigee near full (a “supermoon”)
Closest to Earth this month: 359,335 km.
Dec9Wed
Moon · 09:52
New Moon
Darkest skies of the month for galaxies and the Milky Way.
Dec22Tue
Season · 05:50
Winter solstice
The longest night of the year — the most hours of darkness.
Dec24Thu
Moon · 10:28
Full Moon
Bright moonlight all night; best for the Moon itself.
Dec24Thu
Moon · 17:32
Moon at perigee near full (a “supermoon”)
Closest to Earth this month: 356,641 km.

Quick answers

Will it be clear for stargazing in Tokyo tonight?: Mostly cloudy; the Moon (38% lit) rises at 23:24. That is the hourly total-cloud forecast for Tokyo, Japan on the night of 4 October 2026, read inside the darkest hours: under 25% cloud counts as clear and 65% or more as cloudy.
When does it get dark in Tokyo tonight?: In Tokyo, Japan on the night of 4 October 2026, astronomical darkness begins at 18:46 and lasts until 04:14 GMT+9 — 9 h 28 min of fully dark sky. The Sun sets at 17:21, and nautical twilight ends at 18:16.
Is the Moon up tonight in Tokyo?: On the night of 4 October 2026 in Tokyo, Japan, the Moon is a waning crescent, 38% illuminated. It sets at 13:33 and rises at 23:24, GMT+9. 4 h 40 min of the dark window is moon-free.
Which planets can I see from Tokyo tonight?: From Tokyo, Japan on the night of 4 October 2026: Mars (01:06–04:14, highest 48° in the E at 04:14, magnitude 1.1); Jupiter (02:26–04:14, highest 32° in the E at 04:14, magnitude -1.9); Saturn (18:46–04:14, highest 56° in the S at 23:36, magnitude 0.2). Times are GMT+9; all are visible to the naked eye.

Forecast details

Location: 35.690° N, 139.692° E
Elevation: 44 m
Time zone: Asia/Tokyo (GMT+9)
Weather model: MET Norway Locationforecast 2.0
Forecast issued: 3 Oct, 19:21 UTC
Next update expected: ≈ 3 Oct, 22:57 UTC
Page generated: 3 Oct, 23:20 UTC
Astronomy: Computed with astronomy-engine for these coordinates

Computed for 35.690° N, 139.692° E, elevation 44 m, time zone Asia/Tokyo. City centres are light-polluted; the times here apply anywhere within about 50 km, so drive out to darker skies.

Sun, Moon and planet positions are calculated with astronomy-engine. Twilight uses the Sun's geometric centre; sunrise and sunset use the upper limb with standard refraction.

The summary line restates the hourly total-cloud forecast inside the dark window (clear under 25%, cloudy from 65%) and the Moon's times. It is not a score — the Tonight score lives in the app.

Seeing and transparency forecasts are coming to the app first (North America via Environment Canada's model, a worldwide beta elsewhere).

Nearby city forecasts

All forecasts in Japan Moon phase calendar Telescope FOV calculator

Get tonight's score on your phone

The Astronight app adds an hourly sky score, the best window, seeing and transparency, and alerts for clear nights.

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