See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
19°
Drizzle
Feels Like: 19°
Min: 18°
Max: 24°
The next few hours will be misty, with today reaching 24°C and dropping to 19°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
05:41
Sunrise
17:39
Sunset
Moon
Waxing Gibbous
14:52
Moonrise
00:41
Moonset
Daily Forecast
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Wednesday
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Wednesday
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View stargazing scoreWeather in Shiojiri today, September 21, 2026
Shiojiri 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. Early hours look the most unsettled, with rain probability near 66% by 07:00. The thickest cloud arrives around 07:00, reaching about 100%.
Expect highs of 24°C and cooler readings close to 18°C. The air stays humid, with relative humidity between 78% and 96% and the peak around 07:00. A lighter breeze peaks around 12:00 near 4.7 km/h.
Afternoon conditions improve on the morning wet spell, as rain chances fall toward 18% from about 66% earlier. Cloud still reaches roughly 100% near 12:00. Expect visibility near 2.9 km, with poorer spells close to 0.1 km. Expect sunrise at 05:41, sunset at 17:39, and 11 hours 58 minutes of sunlight today overall.
The practical takeaway for Shiojiri on September 21, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 24°C.
Frequently asked questions about weather in Shiojiri
How warm does it get in Shiojiri?
The warmest month in Shiojiri is August, with average high temperatures of 28°C. The average temperature during this period is around 23°C.
How cold does it get in Shiojiri?
The coldest month in Shiojiri is January, with average low temperatures of -5°C. The average temperature during this period is around -2°C.
What is the wettest time of year in Shiojiri?
The wettest month in Shiojiri is July, with an average of 226mm of precipitation.
What is the driest time of year in Shiojiri?
The driest month in Shiojiri is January, with an average of 80mm of precipitation.
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