Current Conditions

Isumi, Chiba

77°F25°C

Rain

Wind

E 10 mph17 km/h

Humidity

91%

Cloud Cover

99%

As of Friday, August 14, 2026 at 1:05 AM GMT+9

Today's Outlook

Day

Overcast and warm, with a high of 80°F27°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 98% chance of rain throughout the day. Heavy, humid air.

Night

Overcast, with a low around 77°F25°C. Breezy from the E at 10 mph15 km/h. 97% chance of rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 80°F27°C	Low 77°F25°C	Precip 0.89 in22.5 mm98%	Cloud 86%	Wind E 9 mph15 km/h	Friday: Overcast and warm, with a high of 80°F27°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 98% chance of rain throughout the day. Heavy, humid air. Friday Night: Overcast, with a low around 77°F25°C. Breezy from the E at 10 mph15 km/h. 97% chance of rain throughout the night.
Showers	High 81°F27°CFeels 85°F29°C	Low 78°F25°C	Precip 0.13 in3.4 mm87%	Cloud 68%	Wind E 10 mph16 km/h	Saturday: Mostly cloudy and warm, with a high of 81°F27°C. Breezy from the E at 10 to 11 mph17 to 18 km/h. 32% chance of drizzle throughout the day. Heavy, humid air. Saturday Night: Mostly cloudy, with a low around 78°F25°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 87% chance of light rain overnight.
Drizzle	High 80°F27°C	Low 77°F25°C	Precip 0.05 in1.2 mm49%	Cloud 70%	Wind ENE 9 mph14 km/h	Sunday: Mostly cloudy and warm, with a high of 80°F27°C. Breezy from the ENE at 9 to 10 mph15 to 16 km/h. 49% chance of drizzle throughout the day. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the ENE at 8 to 9 mph14 to 14 km/h. 17% chance of drizzle in the evening.
Drizzle	High 81°F27°CFeels 86°F30°C	Low 78°F25°C	Precip 0.04 in1.1 mm40%	Cloud 87%	Wind ESE 7 mph11 km/h	Monday: Overcast and warm, with a high of 81°F27°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 40% chance of drizzle throughout the day. Heavy, humid air. Monday Night: Overcast, with a low around 78°F25°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 26% chance of drizzle overnight.
Drizzle	High 82°F28°CFeels 88°F31°C	Low 79°F26°C	Precip 0.09 in2.4 mm26%	Cloud 74%	Wind SE 7 mph11 km/h	Tuesday: Mostly cloudy and warm, with a high of 82°F28°C — feels like 88°F31°C. Breezy from the SE at 7 to 9 mph12 to 14 km/h. 26% chance of drizzle throughout the day. Heavy, humid air. Tuesday Night: Mostly cloudy, with a low around 79°F26°C. Breezy from the SE at 7 to 8 mph11 to 13 km/h. 11% chance of drizzle throughout the night.
Drizzle	High 83°F28°CFeels 90°F32°C	Low 79°F26°C	Precip 0.06 in1.4 mm26%	Cloud 54%	Wind SE 6 mph10 km/h	Wednesday: Mostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the SE at 7 to 8 mph10 to 13 km/h. 26% chance of drizzle throughout the day. Heavy, humid air. Wednesday Night: Mostly cloudy, with a low around 79°F26°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 14% chance of drizzle overnight.
Drizzle	High 83°F28°CFeels 90°F32°C	Low 79°F26°C	Precip 0.07 in1.7 mm25%	Cloud 58%	Wind SSE 6 mph10 km/h	Thursday: Mostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the SE at 7 to 9 mph11 to 14 km/h. 25% chance of drizzle throughout the day. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 79°F26°C. Breezy from the SSE at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	FridayAug 14	80°F27°C	77°F25°C	0.89 in22.5 mm· 98%	86%	Rain	E 9 mph15 km/h
DayOvercast and warm, with a high of 80°F27°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 98% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 77°F25°C. Breezy from the E at 10 mph15 km/h. 97% chance of rain throughout the night.
	SaturdayAug 15	81°F27°C Feels 85°F29°C	78°F25°C	0.13 in3.4 mm· 87%	68%	Showers	E 10 mph16 km/h
DayMostly cloudy and warm, with a high of 81°F27°C. Breezy from the E at 10 to 11 mph17 to 18 km/h. 32% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 78°F25°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 87% chance of light rain overnight.
	SundayAug 16	80°F27°C	77°F25°C	0.05 in1.2 mm· 49%	70%	Drizzle	ENE 9 mph14 km/h
DayMostly cloudy and warm, with a high of 80°F27°C. Breezy from the ENE at 9 to 10 mph15 to 16 km/h. 49% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 77°F25°C. Breezy from the ENE at 8 to 9 mph14 to 14 km/h. 17% chance of drizzle in the evening.
	MondayAug 17	81°F27°C Feels 86°F30°C	78°F25°C	0.04 in1.1 mm· 40%	87%	Drizzle	ESE 7 mph11 km/h
DayOvercast and warm, with a high of 81°F27°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 40% chance of drizzle throughout the day. Heavy, humid air. NightOvercast, with a low around 78°F25°C. Breezy from the ESE at 7 to 8 mph11 to 13 km/h. 26% chance of drizzle overnight.
	TuesdayAug 18	82°F28°C Feels 88°F31°C	79°F26°C	0.09 in2.4 mm· 26%	74%	Drizzle	SE 7 mph11 km/h
DayMostly cloudy and warm, with a high of 82°F28°C — feels like 88°F31°C. Breezy from the SE at 7 to 9 mph12 to 14 km/h. 26% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 79°F26°C. Breezy from the SE at 7 to 8 mph11 to 13 km/h. 11% chance of drizzle throughout the night.
	WednesdayAug 19	83°F28°C Feels 90°F32°C	79°F26°C	0.06 in1.4 mm· 26%	54%	Drizzle	SE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the SE at 7 to 8 mph10 to 13 km/h. 26% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 79°F26°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 14% chance of drizzle overnight.
	ThursdayAug 20	83°F28°C Feels 90°F32°C	79°F26°C	0.07 in1.7 mm· 25%	58%	Drizzle	SSE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the SE at 7 to 9 mph11 to 14 km/h. 25% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 79°F26°C. Breezy from the SSE at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle throughout the night.
	FridayAug 21	83°F28°C Feels 89°F32°C	79°F26°C	0.15 in3.8 mm· 35%	63%	Showers	S 8 mph12 km/h
DayMostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the S at 8 to 10 mph13 to 15 km/h. 35% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 79°F26°C. Breezy from the S at 7 to 9 mph12 to 14 km/h. 24% chance of showers throughout the night.
	SaturdayAug 22	83°F28°C Feels 90°F32°C	79°F26°C	0.21 in5.3 mm· 38%	64%	Showers	SSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 83°F28°C — feels like 90°F32°C. Breezy from the SSW at 9 to 10 mph14 to 17 km/h. 38% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 79°F26°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h. 33% chance of showers throughout the night.
	SundayAug 23	84°F29°C Feels 91°F33°C	80°F26°C	0.09 in2.3 mm· 25%	60%	Drizzle	SSW 10 mph16 km/h
DayMostly cloudy and warm, with a high of 84°F29°C — feels like 91°F33°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h. 23% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 80°F26°C. Breezy from the SSW at 10 mph16 km/h. 25% chance of drizzle throughout the night.
	MondayAug 24	84°F29°C Feels 92°F33°C	80°F27°C	0.09 in2.4 mm· 28%	52%	Drizzle	SSW 10 mph16 km/h
DayMostly cloudy and warm, with a high of 84°F29°C — feels like 91°F33°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h. 28% chance of drizzle throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 80°F27°C. Breezy from the SSW at 10 to 11 mph16 to 17 km/h. 16% chance of drizzle throughout the night.
	TuesdayAug 25	84°F29°C Feels 93°F34°C	80°F27°C	0.1 in2.6 mm· 18%	43%	Drizzle	SSW 11 mph18 km/h
DayPartly cloudy and warm, with a high of 84°F29°C — feels like 93°F34°C. Breezy from the SSW at 11 to 12 mph18 to 20 km/h. 18% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 80°F27°C. Breezy from the SSW at 11 to 12 mph18 to 19 km/h. 13% chance of drizzle throughout the night.
	WednesdayAug 26	84°F29°C Feels 93°F34°C	80°F27°C	0.09 in2.2 mm· 19%	44%	Drizzle	SSW 12 mph19 km/h
DayPartly cloudy and warm, with a high of 84°F29°C — feels like 93°F34°C. Breezy from the SSW at 11 to 13 mph18 to 20 km/h. 19% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 81°F27°C. Breezy from the SSW at 12 mph19 km/h. 10% chance of drizzle throughout the night.
	ThursdayAug 27	84°F29°C Feels 92°F33°C	80°F27°C	0.19 in4.9 mm· 33%	49%	Showers	SSW 12 mph19 km/h
DayPartly cloudy and warm, with a high of 84°F29°C — feels like 91°F33°C. Breezy from the SSW at 12 mph19 km/h. 33% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 80°F27°C. Breezy from the SSW at 12 mph19 km/h. 20% chance of showers throughout the night.
	FridayAug 28	82°F28°C Feels 90°F32°C	80°F26°C	0.2 in5.1 mm· 35%	53%	Showers	S 11 mph18 km/h
DayMostly cloudy and warm, with a high of 82°F28°C — feels like 90°F32°C. Breezy from the S at 11 to 12 mph18 to 20 km/h. 35% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 80°F27°C. Breezy from the S at 11 mph18 km/h. 29% chance of showers throughout the night.

Nearby Cities

Ōhara1 mi2 km Katsuura8 mi12 km Mobara15 mi24 km Kamogawa20 mi31 km Ōamishirasato20 mi32 km Ōami20 mi33 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: 35.2300°N, 140.4049°E·Elevation: 1m·Timezone: Asia/Tokyo·Population: 35,544