Current Conditions

Iiyama, Nagano

70°F21°C

Heavy Rain

Wind

NNW 2 mph3 km/h

Humidity

97%

Cloud Cover

100%

As of Wednesday, September 9, 2026 at 1:45 AM GMT+9

Today's Outlook

Day

Overcast and warm, with a high of 69°F21°C and morning low of 64°F18°C. Breezy from the N at 6 to 7 mph9 to 11 km/h. 100% chance of heavy rain throughout the day. Humid.

Night

Overcast, with a low around 61°F16°C. Light wind from the N around 4 mph6 km/h. 100% chance of rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Heavy Rain	High 70°F21°C	Low 61°F16°C	Precip 2.35 in59.6 mm100%	Cloud 99%	Wind N 5 mph7 km/h	Wednesday: Overcast and warm, with a high of 69°F21°C and morning low of 64°F18°C. Breezy from the N at 6 to 7 mph9 to 11 km/h. 100% chance of heavy rain throughout the day. Humid. Wednesday Night: Overcast, with a low around 61°F16°C. Light wind from the N around 4 mph6 km/h. 100% chance of rain throughout the night.
Light Rain	High 69°F21°C	Low 58°F15°C	Precip 0.1 in2.6 mm57%	Cloud 84%	Wind ENE 3 mph5 km/h	Thursday: Overcast and warm, with a high of 69°F21°C and morning low of 58°F15°C. Light wind from the E around 3 mph5 km/h. 24% chance of drizzle throughout the day. Thursday Night: Overcast, with a low around 59°F15°C. Light wind from the NE around 3 mph5 km/h. 57% chance of light rain throughout the night.
Rain	High 70°F21°C	Low 62°F16°C	Precip 0.48 in12.2 mm88%	Cloud 91%	Wind NE 2 mph4 km/h	Friday: Overcast and warm, with a high of 70°F21°C and morning low of 62°F16°C. Light wind from the NNE around 2 mph4 km/h. 88% chance of rain throughout the day. Friday Night: Overcast, with a low around 62°F17°C. Light wind from the E around 2 mph4 km/h. 88% chance of rain throughout the night.
Light Rain	High 74°F23°C	Low 64°F18°C	Precip 0.13 in3.2 mm56%	Cloud 80%	Wind ENE 2 mph4 km/h	Saturday: Overcast and warm, with a high of 74°F23°C and morning low of 64°F18°C. Light wind from the NE around 2 mph4 km/h. 56% chance of light rain throughout the day. Saturday Night: Overcast, with a low around 64°F18°C. Light wind from the E around 2 mph3 km/h. 45% chance of light rain throughout the night.
Light Rain	High 77°F25°C	Low 66°F19°C	Precip 0.25 in6.3 mm78%	Cloud 71%	Wind SSE 3 mph5 km/h	Sunday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 66°F19°C. Light wind from the SSE around 3 mph5 km/h. 78% chance of showers throughout the day. Humid. Sunday Night: Mostly cloudy, with a low around 66°F19°C. Light wind from the SSE around 3 mph5 km/h. 61% chance of light rain throughout the night.
Rain	High 75°F24°C	Low 67°F20°C	Precip 0.63 in15.9 mm96%	Cloud 83%	Wind SE 3 mph5 km/h	Monday: Overcast and warm, with a high of 75°F24°C and morning low of 67°F20°C. Light wind from the WNW around 3 mph5 km/h. 96% chance of rain throughout the day. Humid. Monday Night: Overcast, with a low around 68°F20°C. Light wind from the SE around 3 mph5 km/h. 87% chance of light rain throughout the night.
Rain	High 70°F21°C	Low 65°F19°C	Precip 0.89 in22.7 mm98%	Cloud 98%	Wind NNE 2 mph4 km/h	Tuesday: Overcast and warm, with a high of 70°F21°C. Light wind from the NNE around 2 mph4 km/h. 98% chance of rain throughout the day. Humid. Tuesday Night: Overcast, with a low around 65°F19°C. Light wind from the NE around 2 mph3 km/h. 97% chance of rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	70°F21°C	61°F16°C	2.35 in59.6 mm· 100%	99%	Heavy Rain	N 5 mph7 km/h
DayOvercast and warm, with a high of 69°F21°C and morning low of 64°F18°C. Breezy from the N at 6 to 7 mph9 to 11 km/h. 100% chance of heavy rain throughout the day. Humid. NightOvercast, with a low around 61°F16°C. Light wind from the N around 4 mph6 km/h. 100% chance of rain throughout the night.
	ThursdaySep 10	69°F21°C	58°F15°C	0.1 in2.6 mm· 57%	84%	Light Rain	ENE 3 mph5 km/h
DayOvercast and warm, with a high of 69°F21°C and morning low of 58°F15°C. Light wind from the E around 3 mph5 km/h. 24% chance of drizzle throughout the day. NightOvercast, with a low around 59°F15°C. Light wind from the NE around 3 mph5 km/h. 57% chance of light rain throughout the night.
	FridaySep 11	70°F21°C	62°F16°C	0.48 in12.2 mm· 88%	91%	Rain	NE 2 mph4 km/h
DayOvercast and warm, with a high of 70°F21°C and morning low of 62°F16°C. Light wind from the NNE around 2 mph4 km/h. 88% chance of rain throughout the day. NightOvercast, with a low around 62°F17°C. Light wind from the E around 2 mph4 km/h. 88% chance of rain throughout the night.
	SaturdaySep 12	74°F23°C	64°F18°C	0.13 in3.2 mm· 56%	80%	Light Rain	ENE 2 mph4 km/h
DayOvercast and warm, with a high of 74°F23°C and morning low of 64°F18°C. Light wind from the NE around 2 mph4 km/h. 56% chance of light rain throughout the day. NightOvercast, with a low around 64°F18°C. Light wind from the E around 2 mph3 km/h. 45% chance of light rain throughout the night.
	SundaySep 13	77°F25°C	66°F19°C	0.25 in6.3 mm· 78%	71%	Light Rain	SSE 3 mph5 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 66°F19°C. Light wind from the SSE around 3 mph5 km/h. 78% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 66°F19°C. Light wind from the SSE around 3 mph5 km/h. 61% chance of light rain throughout the night.
	MondaySep 14	75°F24°C	67°F20°C	0.63 in15.9 mm· 96%	83%	Rain	SE 3 mph5 km/h
DayOvercast and warm, with a high of 75°F24°C and morning low of 67°F20°C. Light wind from the WNW around 3 mph5 km/h. 96% chance of rain throughout the day. Humid. NightOvercast, with a low around 68°F20°C. Light wind from the SE around 3 mph5 km/h. 87% chance of light rain throughout the night.
	TuesdaySep 15	70°F21°C	65°F19°C	0.89 in22.7 mm· 98%	98%	Rain	NNE 2 mph4 km/h
DayOvercast and warm, with a high of 70°F21°C. Light wind from the NNE around 2 mph4 km/h. 98% chance of rain throughout the day. Humid. NightOvercast, with a low around 65°F19°C. Light wind from the NE around 2 mph3 km/h. 97% chance of rain throughout the night.
	WednesdaySep 16	69°F20°C	64°F18°C	1 in25.4 mm· 91%	97%	Rain	NE 2 mph4 km/h
DayOvercast and warm, with a high of 69°F20°C. Light wind from the NE around 3 mph4 km/h. 91% chance of rain throughout the day. NightOvercast, with a low around 64°F18°C. Light wind from the ENE around 2 mph4 km/h. 85% chance of rain throughout the night.
	ThursdaySep 17	70°F21°C	63°F17°C	0.67 in16.9 mm· 85%	90%	Rain	NE 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. 85% chance of rain throughout the day. NightOvercast, with a low around 63°F17°C. Light wind from the ENE around 2 mph4 km/h. 77% chance of light rain throughout the night.
	FridaySep 18	70°F21°C	62°F17°C	0.49 in12.4 mm· 73%	88%	Light Rain	ESE 3 mph5 km/h
DayOvercast and warm, with a high of 70°F21°C and morning low of 62°F17°C. Light wind from the ESE around 3 mph5 km/h. 73% chance of light rain throughout the day. NightOvercast, with a low around 63°F17°C. Light wind from the SE around 3 mph4 km/h. 63% chance of light rain throughout the night.
	SaturdaySep 19	71°F21°C	63°F17°C	0.46 in11.8 mm· 75%	87%	Rain	SE 3 mph5 km/h
DayOvercast and warm, with a high of 71°F21°C and morning low of 63°F17°C. Light wind from the SE around 4 mph6 km/h. 75% chance of rain throughout the day. NightOvercast, with a low around 63°F17°C. Light wind from the SE around 3 mph5 km/h. 57% chance of light rain throughout the night.
	SundaySep 20	70°F21°C	63°F17°C	0.74 in18.7 mm· 63%	88%	Rain	SE 4 mph7 km/h
DayOvercast and warm, with a high of 70°F21°C and morning low of 63°F17°C. Light wind from the SE around 4 mph7 km/h. 63% chance of rain throughout the day. NightOvercast, with a low around 63°F17°C. Light wind from the SE around 4 mph6 km/h. 55% chance of rain throughout the night.
	MondaySep 21	71°F22°C	63°F17°C	0.56 in14.2 mm· 61%	83%	Light Rain	SSE 4 mph7 km/h
DayOvercast and warm, with a high of 71°F22°C and morning low of 63°F17°C. Light wind from the SSE around 5 mph8 km/h. 61% chance of light rain throughout the day. NightOvercast, with a low around 63°F17°C. Light wind from the SSE around 4 mph6 km/h. 61% chance of light rain throughout the night.
	TuesdaySep 22	72°F22°C	62°F17°C	0.47 in12 mm· 59%	77%	Light Rain	SSE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 62°F17°C. Light wind from the SSE around 4 mph7 km/h. 59% chance of light rain throughout the day. NightMostly cloudy, with a low around 62°F17°C. Light wind from the SE around 4 mph6 km/h. 52% chance of light rain throughout the night.
	WednesdaySep 23	72°F22°C	61°F16°C	0.38 in9.6 mm· 50%	72%	Light Rain	SE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 61°F16°C. Light wind from the E around 4 mph7 km/h. 50% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Light wind from the SE around 3 mph6 km/h. 36% chance of light rain throughout the night.

Nearby Cities

Nakano7 mi11 km Arai13 mi21 km Myoko14 mi22 km Suzaka14 mi23 km Nagano17 mi28 km Jōetsu22 mi35 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.

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Coordinates: 36.8500°N, 138.3667°E·Elevation: 311m·Timezone: Asia/Tokyo·Population: 20,118