Japan weather in August 2025

The weather in Japan in August is very hot. The average temperatures are between 25°C and 31°C, drinking water regularly is advisable.

You can expect about 3 to 8 days of rain in Japan during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Japan in August 2025.

If you’re planning to visit Japan in the near future, we highly recommend that you review the 14 day weather forecast for Japan before you arrive.

Temperatures

31° / 25°

Rainy Days

Snowy Days

Dry Days

Rainfall

158

Sun Hours

10.5

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
					1 34° /28°	2 34° /27°
3 34° /28°	4 33° /27°	5 33° /27°	6 33° /27°	7 33° /27°	8 33° /27°	9 34° /28°
10 34° /28°	11 34° /28°	12 33° /28°	13 32° /27°	14 33° /28°	15 31° /26°	16 31° /25°
17 31° /27°	18 33° /27°	19 32° /27°	20 32° /27°	21 32° /27°	22 32° /27°	23 31° /26°
24 31° /27°	25 32° /26°	26 32° /27°	27 32° /27°	28 31° /26°	29 31° /26°	30 29° /26°
31 31° /26°

Explore the weather in Japan in other months

Japan annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	9° / 2°	5	22	4	90 mm	Bad	Japan in January
February	10° / 3°	6	18	5	127 mm	Bad	Japan in February
March	13° / 6°	8	22	1	192 mm	Bad	Japan in March
April	18° / 10°	7	23	0	201 mm	Ok	Japan in April
May	23° / 16°	8	23	0	190 mm	Good	Japan in May
June	25° / 19°	8	22	0	258 mm	Good	Japan in June
July	29° / 24°	8	23	0	192 mm	Ok	Japan in July
August	31° / 25°	7	24	0	158 mm	Ok	Japan in August
September	27° / 21°	8	22	0	248 mm	Good	Japan in September
October	22° / 15°	7	24	0	286 mm	Ok	Japan in October
November	17° / 11°	5	25	0	121 mm	Good	Japan in November
December	12° / 5°	5	25	1	99 mm	Ok	Japan in December