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Hourly Forecast
Daylight Hours
05:49
Sunrise
17:48
Sunset
Moon
Waxing Gibbous
14:57
Moonrise
00:53
Moonset
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View stargazing scoreWeather in Ōtsu today, September 21, 2026
Ōtsu looks damp on September 21, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Morning plans should assume damp conditions, as rain chances climb toward 24% around 07:00. Cloud cover is also at its densest near 04:00 at roughly 100%.
The day peaks near 26°C and cools toward 22°C. Moisture in the air spans 74%-85%, with the highest values around 21:00. Airflow remains manageable, reaching about 5.8 km/h around 12:00.
Through the afternoon wet weather remains a factor, with rain chances near 54% around 16:00. Cloud also stays substantial, close to 100% near 12:00. Visibility stays generally good near 14.8 km on average, though it can drop toward 8.8 km in thicker cloud or showers. The sun rises at 05:49 and sets at 17:48, for a total of 11 hours 58 minutes of sunlight today.
Overall, Ōtsu on September 21, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 54% and the high sits around 26°C.
Frequently asked questions about weather in Ōtsu
How warm does it get in Ōtsu?
The warmest month in Ōtsu is August, with average high temperatures of 32°C. The average temperature during this period is around 28°C.
How cold does it get in Ōtsu?
The coldest month in Ōtsu is January, with average low temperatures of 0°C. The average temperature during this period is around 4°C.
What is the wettest time of year in Ōtsu?
The wettest month in Ōtsu is July, with an average of 254mm of precipitation.
What is the driest time of year in Ōtsu?
The driest month in Ōtsu is December, with an average of 57mm of precipitation.
