See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Drizzle
Feels Like: 21°
Min: 21°
Max: 23°
The next few hours will be overcast, with tomorrow reaching 24°C and dropping to 20°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:35
Sunrise
17:46
Sunset
Moon
Waxing Crescent
10:38
Moonrise
20:18
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
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UV Index
Humidity
Weather in Jōetsu tomorrow, September 17, 2026
Jōetsu looks cloudy on September 17, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. The morning carries the wetter risk, with rain chances near 66% and the highest odds around 00:00. Cloud is also thick early on, peaking near 94% around 00:00.
The temperature range runs from about 20°C up to 24°C. Expect humidity between 72% and 95%, most humid near 06:00. Expect gentle winds, highest near 15:00 at 7.3 km/h.
Through the afternoon the main story eases from the wetter morning, with rain odds nearer 0% after earlier peaks around 66%. Cloud remains in play near 56% around 12:00, but the heaviest damp risk should be behind you. Expect visibility around 16.1 km. The sun rises at 05:36 and sets at 17:45, for a total of 12 hours 8 minutes of sunlight today.
In short, treat September 17, 2026 in Jōetsu as a damp day: pack covers, watch the wetter hours, and expect a high near 24°C.
Frequently asked questions about weather in Jōetsu
How warm does it get in Jōetsu?
The warmest month in Jōetsu is August, with average high temperatures of 31°C. The average temperature during this period is around 28°C.
How cold does it get in Jōetsu?
The coldest month in Jōetsu is January, with average low temperatures of 2°C. The average temperature during this period is around 4°C.
What is the wettest time of year in Jōetsu?
The wettest month in Jōetsu is December, with an average of 291mm of precipitation.
What is the driest time of year in Jōetsu?
The driest month in Jōetsu is May, with an average of 108mm of precipitation.
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