Sanmu

Sanmu Shi, Chiba-ken, Japan

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Current Weather

20°

Drizzle and Humid

Feels Like: 20°

Min: 20°

Max: 23°

The next few hours will be humid and overcast, with tomorrow reaching 21°C and dropping to 20°C. The coming days will be drizzle

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Hourly Forecast

20° 20° 20° 20° 20° 20° 20° 20° 20° 20° 19° 19° 19° 19° 19° 19° 19° 19° 19° 20° 20° 21° 21° 20°
74%
80%
80%
80%
100%
100%
100%
100%
100%
100%
96%
96%
96%
74%
74%
74%
18%
18%
18%
6pm
7pm
8pm
9pm
10pm
11pm
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
Today
Tomorrow

Daylight Hours

05:27

Sunrise

17:37

Sunset

12 hours 10 minutes of sunlight today

Moon

Waxing Crescent

10:24

Moonrise

20:13

Moonset

Daily Forecast

Today

20°
23°

Thursday

19°
21°

Friday

20°
23°

Saturday

21°
25°

Sunday

22°
25°

Monday

22°
23°

Tuesday

21°
27°

Wednesday

20°
23°

Thursday

20°
25°

Friday

20°
26°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

97% Very Humid
Low High

Weather in Sanmu tomorrow, September 17, 2026

Sanmu looks damp on September 17, 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 100% around 00:00. Cloud cover is also at its densest near 00:00 at roughly 99%.

Temperatures climb from an overnight low near 19°C toward a daytime high of about 21°C. Moisture in the air spans 72%-97%, with the highest values around 00:00. Winds stay light, near 6.5 km/h by 15:00, so the day feels still more than breezy.

The afternoon should feel quieter than the damp start, with rain probability easing to about 18% after morning values near 100%. Cloud cover stays around 82% by 12:00. Visibility holds near 15.1 km, though it can fall to 6.2 km. Sunrise is at 05:28 and sunset at 17:36, giving 12 hours 8 minutes of sunlight today.

In short, treat September 17, 2026 in Sanmu as a damp day: pack covers, watch the wetter hours, and expect a high near 21°C.

Frequently asked questions about weather in Sanmu

How warm does it get in Sanmu?

The warmest month in Sanmu 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 Sanmu?

The coldest month in Sanmu is January, with average low temperatures of 3°C. The average temperature during this period is around 6°C.

What is the wettest time of year in Sanmu?

The wettest month in Sanmu is October, with an average of 191mm of precipitation.

What is the driest time of year in Sanmu?

The driest month in Sanmu is January, with an average of 62mm of precipitation.

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Metric (°C, km/h)