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05:40
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17:38
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Waxing Gibbous
14:52
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00:38
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View stargazing scoreWeather in Nagano today, September 21, 2026
Expect unsettled, showery conditions in Nagano on September 21, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. Morning plans should assume damp conditions, as rain chances climb toward 68% around 04:00. Cloud cover is also at its densest near 04:00 at roughly 100%.
Temperatures climb from an overnight low near 20°C toward a daytime high of about 24°C. The air stays humid, with relative humidity between 85% and 95% and the peak around 04:00. Expect gentle winds, highest near 18:00 at 3.5 km/h.
The second half of the day still looks unsettled, with rain probability around 96% by 19:00. Dense cloud near 100% at 12:00 keeps the feel grey. Visibility stays generally good near 7.9 km on average, though it can drop toward 0.1 km in thicker cloud or showers. Sunrise is at 05:40 and sunset at 17:38, giving 11 hours 58 minutes of sunlight today.
Overall, Nagano on September 21, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 96% and the high sits around 24°C.
Frequently asked questions about weather in Nagano
How warm does it get in Nagano?
The warmest month in Nagano is August, with average high temperatures of 29°C. The average temperature during this period is around 24°C.
How cold does it get in Nagano?
The coldest month in Nagano 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 Nagano?
The wettest month in Nagano is July, with an average of 275mm of precipitation.
What is the driest time of year in Nagano?
The driest month in Nagano is November, with an average of 119mm of precipitation.
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