Current Conditions

Iwai, Tokyo

75°F24°C

Heavy Rain

Wind

SSW 6 mph10 km/h

Humidity

94%

Cloud Cover

94%

As of Wednesday, September 9, 2026 at 4:12 AM GMT+9

Today's Outlook

Day

Overcast and warm, with a high of 84°F29°C and morning low of 75°F24°C — feels like 93°F34°C. Light wind from the SW around 5 mph8 km/h. 100% chance of rain throughout the day. Heavy, humid air.

Night

Overcast, with a low around 68°F20°C. Light wind from the N around 5 mph9 km/h. 100% chance of heavy rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Heavy Rain	High 84°F29°CFeels 93°F34°C	Low 68°F20°C	Precip 1.07 in27.3 mm100%	Cloud 93%	Wind SW 5 mph9 km/h	Wednesday: Overcast and warm, with a high of 84°F29°C and morning low of 75°F24°C — feels like 93°F34°C. Light wind from the SW around 5 mph8 km/h. 100% chance of rain throughout the day. Heavy, humid air. Wednesday Night: Overcast, with a low around 68°F20°C. Light wind from the N around 5 mph9 km/h. 100% chance of heavy rain throughout the night.
Rain	High 66°F19°C	Low 64°F18°C	Precip 0.66 in16.7 mm95%	Cloud 98%	Wind ENE 3 mph5 km/h	Thursday: Overcast and mild, with a high of 66°F19°C. Light wind from the ENE around 3 mph5 km/h. 89% chance of light rain throughout the day. Thursday Night: Overcast, with a low around 64°F18°C. Light wind from the NE around 3 mph4 km/h. 95% chance of rain throughout the night.
Rain	High 70°F21°C	Low 63°F17°C	Precip 1.19 in30.2 mm88%	Cloud 92%	Wind NNE 3 mph4 km/h	Friday: Overcast and warm, with a high of 70°F21°C and morning low of 63°F17°C. Light wind from the NNE around 3 mph5 km/h. 88% chance of rain throughout the day. Friday Night: Overcast, with a low around 63°F17°C. Light wind from the NNE around 2 mph4 km/h. 84% chance of rain throughout the night.
Light Rain	High 74°F23°C	Low 66°F19°C	Precip 0.14 in3.5 mm30%	Cloud 87%	Wind ENE 3 mph4 km/h	Saturday: Overcast and warm, with a high of 74°F23°C and morning low of 66°F19°C. Light wind from the ENE around 3 mph5 km/h. 29% chance of light rain throughout the day. Humid. Saturday Night: Overcast, with a low around 66°F19°C. Light wind from the NE around 2 mph4 km/h. 30% chance of drizzle throughout the night.
Light Rain	High 75°F24°C	Low 67°F20°C	Precip 0.11 in2.8 mm43%	Cloud 88%	Wind E 3 mph4 km/h	Sunday: Overcast and warm, with a high of 75°F24°C and morning low of 67°F20°C. Light wind from the E around 3 mph5 km/h. 43% chance of light rain throughout the day. Humid. Sunday Night: Overcast, with a low around 68°F20°C. Light wind from the E around 2 mph3 km/h. 23% chance of drizzle throughout the night.
Light Rain	High 82°F28°CFeels 87°F30°C	Low 70°F21°C	Precip 0.13 in3.3 mm55%	Cloud 71%	Wind S 3 mph5 km/h	Monday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Light wind from the SSE around 4 mph6 km/h. 55% chance of showers around midday. Heavy, humid air. Monday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the SW around 2 mph3 km/h. 53% chance of light rain in the evening.
Rain	High 76°F25°C	Low 70°F21°C	Precip 0.57 in14.6 mm90%	Cloud 95%	Wind NE 3 mph5 km/h	Tuesday: Overcast and warm, with a high of 76°F25°C and morning low of 72°F22°C. Light wind from the ENE around 3 mph5 km/h. 90% chance of rain throughout the day. Heavy, humid air. Tuesday Night: Overcast, with a low around 70°F21°C. Light wind from the NNW around 3 mph4 km/h. 88% chance of rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	84°F29°C Feels 93°F34°C	68°F20°C	1.07 in27.3 mm· 100%	93%	Heavy Rain	SW 5 mph9 km/h
DayOvercast and warm, with a high of 84°F29°C and morning low of 75°F24°C — feels like 93°F34°C. Light wind from the SW around 5 mph8 km/h. 100% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 68°F20°C. Light wind from the N around 5 mph9 km/h. 100% chance of heavy rain throughout the night.
	ThursdaySep 10	66°F19°C	64°F18°C	0.66 in16.7 mm· 95%	98%	Rain	ENE 3 mph5 km/h
DayOvercast and mild, with a high of 66°F19°C. Light wind from the ENE around 3 mph5 km/h. 89% chance of light rain throughout the day. NightOvercast, with a low around 64°F18°C. Light wind from the NE around 3 mph4 km/h. 95% chance of rain throughout the night.
	FridaySep 11	70°F21°C	63°F17°C	1.19 in30.2 mm· 88%	92%	Rain	NNE 3 mph4 km/h
DayOvercast and warm, with a high of 70°F21°C and morning low of 63°F17°C. Light wind from the NNE around 3 mph5 km/h. 88% chance of rain throughout the day. NightOvercast, with a low around 63°F17°C. Light wind from the NNE around 2 mph4 km/h. 84% chance of rain throughout the night.
	SaturdaySep 12	74°F23°C	66°F19°C	0.14 in3.5 mm· 30%	87%	Light Rain	ENE 3 mph4 km/h
DayOvercast and warm, with a high of 74°F23°C and morning low of 66°F19°C. Light wind from the ENE around 3 mph5 km/h. 29% chance of light rain throughout the day. Humid. NightOvercast, with a low around 66°F19°C. Light wind from the NE around 2 mph4 km/h. 30% chance of drizzle throughout the night.
	SundaySep 13	75°F24°C	67°F20°C	0.11 in2.8 mm· 43%	88%	Light Rain	E 3 mph4 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 67°F20°C. Light wind from the E around 3 mph5 km/h. 43% chance of light rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Light wind from the E around 2 mph3 km/h. 23% chance of drizzle throughout the night.
	MondaySep 14	82°F28°C Feels 87°F30°C	70°F21°C	0.13 in3.3 mm· 55%	71%	Light Rain	S 3 mph5 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Light wind from the SSE around 4 mph6 km/h. 55% chance of showers around midday. Heavy, humid air. NightMostly cloudy, with a low around 70°F21°C. Light wind from the SW around 2 mph3 km/h. 53% chance of light rain in the evening.
	TuesdaySep 15	76°F25°C	70°F21°C	0.57 in14.6 mm· 90%	95%	Rain	NE 3 mph5 km/h
DayOvercast and warm, with a high of 76°F25°C and morning low of 72°F22°C. Light wind from the ENE around 3 mph5 km/h. 90% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 70°F21°C. Light wind from the NNW around 3 mph4 km/h. 88% chance of rain throughout the night.
	WednesdaySep 16	72°F22°C	69°F20°C	0.67 in17 mm· 92%	98%	Rain	NE 3 mph5 km/h
DayOvercast and warm, with a high of 72°F22°C. Light wind from the NE around 3 mph6 km/h. 92% chance of rain throughout the day. Humid. NightOvercast, with a low around 69°F21°C. Light wind from the NNE around 3 mph4 km/h. 90% chance of rain throughout the night.
	ThursdaySep 17	72°F22°C	68°F20°C	0.59 in15.1 mm· 83%	95%	Light Rain	NNE 4 mph6 km/h
DayOvercast and warm, with a high of 72°F22°C. Light wind from the NNE around 4 mph7 km/h. 83% chance of light rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Light wind from the N around 3 mph5 km/h. 72% chance of light rain throughout the night.
	FridaySep 18	72°F22°C	67°F19°C	0.59 in15 mm· 75%	89%	Rain	N 5 mph7 km/h
DayOvercast and warm, with a high of 72°F22°C and morning low of 67°F19°C. Light wind from the NNE around 5 mph8 km/h. 75% chance of light rain throughout the day. Humid. NightOvercast, with a low around 67°F19°C. Light wind from the N around 4 mph7 km/h. 69% chance of rain throughout the night.
	SaturdaySep 19	72°F22°C	66°F19°C	1.22 in31.1 mm· 70%	85%	Rain	N 6 mph9 km/h
DayOvercast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Light wind from the N around 6 mph10 km/h. 70% chance of rain throughout the day. NightOvercast, with a low around 66°F19°C. Light wind from the N around 5 mph8 km/h. 66% chance of rain throughout the night.
	SundaySep 20	72°F22°C	66°F19°C	1.54 in39 mm· 72%	85%	Rain	N 6 mph10 km/h
DayOvercast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the NNE at 7 to 8 mph11 to 12 km/h. 72% chance of rain throughout the day. NightOvercast, with a low around 66°F19°C. Light wind from the NNW around 6 mph10 km/h. 66% chance of rain throughout the night.
	MondaySep 21	74°F23°C	66°F19°C	0.91 in23.2 mm· 60%	76%	Rain	W 6 mph9 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 66°F19°C. Light wind from the ESE around 6 mph10 km/h. 55% chance of rain throughout the day. NightMostly cloudy, with a low around 66°F19°C. Light wind from the WNW around 5 mph8 km/h. 60% chance of rain throughout the night.
	TuesdaySep 22	75°F24°C	65°F18°C	0.6 in15.3 mm· 53%	69%	Showers	N 5 mph8 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Light wind from the ENE around 5 mph9 km/h. 53% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F19°C. Light wind from the WNW around 4 mph7 km/h. 42% chance of showers throughout the night.
	WednesdaySep 23	75°F24°C	64°F18°C	0.29 in7.3 mm· 47%	64%	Showers	NNE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Light wind from the NE around 4 mph7 km/h. 47% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Light wind from the WNW around 3 mph5 km/h. 35% chance of showers throughout the night.

Nearby Cities

Akiruno1 mi2 km Itsukaichi2 mi3 km Ōme2 mi4 km Hamura5 mi8 km Fussa5 mi8 km Hakonegasaki7 mi11 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 35.7500°N, 139.2333°E·Elevation: 321m·Timezone: Asia/Tokyo·Population: 16,958