7 day weather forecast

 Effective as of 5:00 PM JST Friday July 23 2021

Explanatory notes:

Hot and humid throughout with the risk of showers and thunderstorms throughout the forecast period.

On Saturday, isolated to scattered showers and thunderstorms are expected to form over inland areas and to the north (and also about the Peninsula) in the afternoon with solar heating, northeasterly steering flow results in the slight (20%) chance of a shower or thunderstorm being advected over the city.

On Sunday, again isolated to scattered showers and thunderstorms are expected to form over inland areas and to the north (and also about the Peninsula) in the afternoon with solar heating, stronger northeasterly steering flow results in a slightly higher risk of a shower or thunderstorm advecting over the city.

On Monday and Tuesday, conditions depend upon the movement and development of a tropical system currently in the Northwest Pacific. Still a high degree of uncertainty on the development and movement of this system as the system is still in its early stage of its life cycle.

By Wednesday, this tropical system likely would lie away from the Tokyo region and hot and humid conditions continue. Again isolated to scattered showers and thunderstorms are expected to form over inland areas and to the north (and also about the Peninsula) in the afternoon with solar heating, however, likely southerly/onshore steering flow means on a slight chance of a shower or thunderstorm over the city, the risk mainly comes from advection from the Peninsula.

The possibility of an upper level trough lying within the vicinity of the region towards the end of the forecast period results in further risk of showers and thunderstorms, still some uncertainty on the details this far out.

The rest of Friday July 23:

City:

Mostly cloudy.

Chance of any rain:20%

Tokyo Prefacture:

Mostly cloudy.A slight(20%) chance of a shower or thunderstorm most likely inland.Winds south-southeasterly at 10-20 km/h.

Saturday July 24:

City:

25-33  Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:Nil

Tokyo Prefecture:

Partly cloudy. A slight(30%) chance of showers and thunderstorms over inland areas most liekly in the afternoon and evening, a slight (20%) chance elsewhere. Winds east-southeasterly at 10-20 km/h.

Sunday July 25:

City:

24-33  Degrees Celsius

Possible PM shower or thunderstorm.

Chance of any rain:30%

Amount:0 to 5 mm

Tokyo Prefecture:

Partly cloudy. A slight(30%) chance of showers and thunderstorms most likely in the afternoon and evening. Winds northeasterly at 15-25 km/h.

Monday July 26:

City:

23-31  Degrees Celsius

Possible rain, showers and/or thunderstorms.

Chance of any rain:50%

Amount:0 to 10 mm

Tokyo Prefecture:

Partly to mostly cloudy.A medium(50%) chance of rain, showers and thunderstorms. Winds dependent upon the movement and development of a tropical system.

Tuesday July 27:

City:

23-30  Degrees Celsius

Possible rain, showers and/or thunderstorms.

Chance of any rain:50%

Amount:0 to 10 mm

Tokyo Prefecture:

Partly to mostly cloudy.A medium(50%) chance of rain, showers and thunderstorms. Winds dependent upon the movement and development of a tropical system.

Wednesday July 28:

City:

24-32  Degrees Celsius

Partly cloudy.

Chance of any rain:20%

Amount:Nil

Tokyo Prefecture:

Partly cloudy. A slight(30%) chance of showers and thunderstorms over inland areas most likely in the afternoon and evening, a slight (20%) chance elsewhere. Winds southerly at 15-25 km/h.

Thursday July 29:

City:

24-32  Degrees Celsius

Possible shower or thunderstorm.

Chance of any rain:30%

Amount:0 to 5 mm

Tokyo Prefecture:

Partly cloudy. A slight(30%) chance of showers and thunderstorms.Light winds tending southerly at 15-25 km/h during the day.

Friday July 30:

City:

24-33  Degrees Celsius

Possible shower or thunderstorm.

Chance of any rain:30%

Amount:0 to 5 mm

Tokyo Prefecture:

Partly cloudy. A slight(30%) chance of showers and thunderstorms.Light winds tending southeasterly at 10-20 km/h during the day.

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