Tokyo’s skyglow is intense, so Okutama, Bōsō, and Izu dark sites define real deep-sky nights. Winter Siberian highs deliver the sharpest transparency of the year.
Baiu rainy season often erases June–July observing windows.
Japan · Kantō · ~35.7°N
Tonight in Tokyo
Astronomical dark
6:23 PM to 4:29 AM (GMT+9)
Moonless window
2:27 AM to 4:29 AM (GMT+9), 2 h 2 min; the Moon is 85% lit
October climate
The area around Tokyo averages 68% cloud cover and 7.2 mm of rain a day in October
Clearest months
January, November and December
Tonight is 22 Oct, times in Asia/Tokyo (GMT+9), computed with astronomy-engine for 35.68° N, 139.65° E. Climate: NASA POWER monthly means, 2001-2020, cloud and rain averaged over the whole day.
FAQ
Is tonight good for stargazing in Tokyo?
Check the live Tonight score for Tokyo (cloud, dew, transparency, and astronomical dark), then read the hourly cloud timing chart and moonless dark window on this page.
What is the best time to stargaze tonight?
Use the best clear window clock times after astronomical darkness, and prefer moonless hours when deep-sky contrast matters.
When is the moon window in Tokyo?
Tonight (22 Oct) the moonless dark window in Tokyo runs from 2:27 AM to 4:29 AM (GMT+9). This hub also shows moonrise, moonset and illumination; open Dark Sky Window for the full ephemeris card.
When does it get dark tonight in Tokyo?
Tonight (22 Oct) astronomical darkness in Tokyo runs from 6:23 PM to 4:29 AM (GMT+9). This hub lists sunset, civil, nautical and astronomical dusk and the matching dawn times, plus when the Moon and planets are highest. Astronomical darkness starts when the Sun is 18° below the horizon.
When can I see the ISS from Tokyo?
ISS passes are spottable near dusk or dawn when the sky is dark and the station is still sunlit. This page lists the next spottable pass when available.