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Hourly Forecast
Daylight Hours
05:41
Sunrise
17:40
Sunset
Moon
Waxing Gibbous
14:53
Moonrise
00:40
Moonset
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View stargazing scoreWeather in Ōmachi today, September 21, 2026
Ōmachi starts September 21, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Morning plans should assume damp conditions, as rain chances climb toward 56% around 06:00. Cloud cover is also at its densest near 06:00 at roughly 100%.
The day peaks near 25°C and cools toward 19°C. Relative humidity sits between 85% and 100%, reaching its peak around 18:00. A lighter breeze peaks around 18:00 near 1.6 km/h.
The second half of the day still looks unsettled, with rain probability around 32% by 16:00. Dense cloud near 100% at 12:00 keeps the feel grey. Horizontal visibility sits around 4.9 km, briefly nearer 0.1 km. Daylight runs from 05:41 to 17:40, lasting 11 hours 58 minutes of sunlight today.
The practical takeaway for Ōmachi on September 21, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 25°C.
Frequently asked questions about weather in Ōmachi
How warm does it get in Ōmachi?
The warmest month in Ōmachi is August, with average high temperatures of 24°C. The average temperature during this period is around 20°C.
How cold does it get in Ōmachi?
The coldest month in Ōmachi is January, with average low temperatures of -11°C. The average temperature during this period is around -7°C.
What is the wettest time of year in Ōmachi?
The wettest month in Ōmachi is July, with an average of 489mm of precipitation.
What is the driest time of year in Ōmachi?
The driest month in Ōmachi is November, with an average of 175mm of precipitation.
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