Iwai

Nishitama-gun, Tokyo Prefecture, Japan

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Current Weather

20°

Light Rain

Feels Like: 20°

Min: 18°

Max: 21°

The next few hours will be foggy and humid, with today reaching 21°C and dropping to 17°C. The coming days will be light rain throughout the day.

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Hourly Forecast

20° 20° 20° 21° 21° 21° 20° 20° 20° 19° 19° 19° 19° 18° 18° 18° 18° 18° 18° 18° 18° 17° 17° 17°
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96%
96%
96%
70%
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Today
Tomorrow

Daylight Hours

05:31

Sunrise

17:42

Sunset

12 hours 10 minutes of sunlight today

Moon

Waxing Crescent

10:29

Moonrise

20:18

Moonset

Daily Forecast

Wednesday

18°
21°

Thursday

17°
22°

Friday

17°
22°

Saturday

19°
24°

Sunday

20°
25°

Monday

21°
23°

Tuesday

21°
29°

Wednesday

19°
22°

Thursday

19°
24°

Friday

18°
24°

Air Quality Data Available

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Weather in Iwai today, September 16, 2026

Iwai starts September 16, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. The morning carries the wetter risk, with rain chances near 100% and the highest odds around 08:00. Cloud is also thick early on, peaking near 100% around 08:00.

Temperatures climb from an overnight low near 18°C toward a daytime high of about 21°C. Expect humidity between 89% and 97%, most humid near 08:00. A lighter breeze peaks around 15:00 near 2.3 km/h.

The second half of the day still looks unsettled, with rain probability around 100% by 12:00. Dense cloud near 100% at 12:00 keeps the feel grey. Visibility stays generally good near 1.6 km on average, though it can drop toward 0.4 km in thicker cloud or showers. Sunrise is at 05:31 and sunset at 17:42, giving 12 hours 10 minutes of sunlight today.

Overall, Iwai on September 16, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 100% and the high sits around 21°C.

Frequently asked questions about weather in Iwai

How warm does it get in Iwai?

The warmest month in Iwai is August, with average high temperatures of 30°C. The average temperature during this period is around 26°C.

How cold does it get in Iwai?

The coldest month in Iwai is January, with average low temperatures of -1°C. The average temperature during this period is around 3°C.

What is the wettest time of year in Iwai?

The wettest month in Iwai is July, with an average of 261mm of precipitation.

What is the driest time of year in Iwai?

The driest month in Iwai is December, with an average of 53mm of precipitation.

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Metric (°C, km/h)