Japan weather

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Below are the temperatures expected today at popular destinations in Japan. Select a destination to compare today's forecast with average weather conditions.

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The weather guide for Japan shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

Which is the hottest month in Japan?

The hottest time of year in Tokyo, Japan is normally August. Expect maximum daytime temperatures to reach 31°C with high heat and humidity.

Which month has the most rain in Japan?

In terms of rainfall, June is usually the wettest month in Tokyo, Japan with 181mm on average. There are normally 20 days in June with some rain.

When is it sunniest in Japan?

The sunniest time of year in Tokyo, Japan is normally January with bright sunshine on average for 59% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Japan?

The sea is usually at its warmest in Tokyo, Japan in August when the water temperature reaches 26°C.

Metric (°C / mm) | Imperial (°F / inches)

Japan weather overview

Japan, a group of mountainous volcanic islands off the coast of Asia, has a predominantly temperate, seasonal climate with cool to cold but sunny winters, warm to hot summers and mild weather in the spring and autumn.

However, there are exceptions to this: the island of Hokkaido and the northern areas of Honshu experience heavy snows in the winter months when cold winds gust in from Siberia, gathering moisture from the sea as they come.

In central and southern Japan, winter is the (relatively) dry season while there is moderate rainfall in the summer and autumn with the chance of a typhoon, accompanied by heavy rainfall, blowing in from the South China Sea from July to September.

Tropical storm risk: Tokyo, Japan typhoon season

% of month affected by tropical storms

1.4%

2.3%

5.6%

4.8%

1.9%

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

The Tokyo, Japan tropical storm risk chart above shows the typhoon season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms

Southern summers tend to be warm and humid with heavy cloud cover. The mountain areas are usually the most pleasant parts of Japan in the summer months when conditions are predominantly sunny and crisp.

Spring is the best time to visit the lower parts of the country; it brings not only fresh, sunny weather but also the legendary 'cherry blossom time'.

What to pack for Japan weather

While light clothes are fine in the summer, you should combine light clothing with some warmer attire in the spring and autumn, and take much warmer clothing for the winter and visits to the mountain areas. Go prepared for rain in the summer.