Saku

Saku Shi, Nagano-ken, Japan

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Current Weather

18°

Light Rain

Feels Like: 19°

Min: 18°

Max: 22°

The next few hours will be light rain, with today reaching 22°C and dropping to 19°C. The coming days will be light rain throughout the day.

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Hourly Forecast

18° 19° 19° 19° 20° 20° 21° 21° 22° 22° 22° 22° 22° 22° 21° 20° 20° 20° 20° 20° 19° 19° 19° 19°
92%
100%
100%
100%
96%
96%
96%
100%
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100%
100%
100%
98%
98%
98%
68%
68%
68%
22%
22%
22%
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12pm
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Today
Tomorrow

Daylight Hours

05:38

Sunrise

17:37

Sunset

11 hours 58 minutes of sunlight today

Moon

Waxing Gibbous

14:50

Moonrise

00:38

Moonset

Daily Forecast

Monday

18°
22°

Tuesday

15°
24°

Wednesday

14°
21°

Thursday

15°
23°

Friday

14°
22°

Saturday

15°
16°

Sunday

15°
20°

Monday

16°
22°

Tuesday

12°
20°

Wednesday

11°
24°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

97% Very Humid
Low High

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Weather in Saku today, September 21, 2026

Saku 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. Wetter spells lean into the morning, when rain odds reach about 100% near 04:00. Skies look heaviest around 03:00, with cover close to 100%.

The day peaks near 22°C and cools toward 18°C. Relative humidity sits between 94% and 98%, reaching its peak around 06:00. Winds stay light, near 5.2 km/h by 23:00, so the day feels still more than breezy.

Afternoon showers stay in play, peaking near 100% around 12:00. Skies remain cluttered, with cover about 100% by 12:00. Horizontal visibility sits around 0.2 km, briefly nearer 0.1 km. Daylight runs from 05:38 to 17:37, lasting 11 hours 58 minutes of sunlight today.

In short, treat September 21, 2026 in Saku as a damp day: pack covers, watch the wetter hours, and expect a high near 22°C.

Frequently asked questions about weather in Saku

How warm does it get in Saku?

The warmest month in Saku is August, with average high temperatures of 28°C. The average temperature during this period is around 24°C.

How cold does it get in Saku?

The coldest month in Saku is January, with average low temperatures of -3°C. The average temperature during this period is around 0°C.

What is the wettest time of year in Saku?

The wettest month in Saku is July, with an average of 238mm of precipitation.

What is the driest time of year in Saku?

The driest month in Saku is December, with an average of 47mm of precipitation.

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Metric (°C, km/h)