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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scope Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Japan’s weather varies widely by month: winter (December–February) is cold and dry in most regions, spring (March–May) mild and often rainy, summer (June–August) hot and humid, and autumn (September–November) cool and pleasant. The live forecast above shows today’s conditions for Tokyo, which reflects the current seasonal pattern.
What is the weather like in Japan each month?
January and February are the coldest months, with average temperatures in Tokyo around 5–10°C, while Sapporo sees below-freezing highs and heavy snow. March brings gradual warming but lingering chill; cherry-blossom season begins in late March across central Honshu. April and May offer comfortable highs of 15–25°C, though April can be rainy. June marks the start of the rainy season (tsuyu) in most of the country except Hokkaido, with high humidity and frequent showers. July and August are hot and humid across Japan; Tokyo’s average highs reach 30–31°C, and many coastal areas experience typhoons from August into September. September remains warm but less humid, with typhoon risk peaking. October and November bring crisp, sunny days — ideal for travel — as temperatures drop to 10–20°C. December turns cold and dry, especially in northern Japan, with snow returning to mountain regions.
How do temperatures compare across Japan by month?
Northern Japan (Hokkaido) has the coldest winters, with average lows around –7°C in January and February, and mild summers around 20°C. Central Japan (Tokyo, Osaka) sees winter lows near 2°C and summer highs near 31°C. Southern Japan (Okinawa) stays subtropical: winter averages 16–20°C, summer 28–32°C. The japan temperature by month celsius data shows the widest range in Sapporo (from –3°C in January to 22°C in August) and the smallest in Naha (17°C in January to 29°C in July). For historical context, the average temperature in japan 1945 was similar to today’s averages, though recent decades show a slight warming trend. Travellers checking japan weather by month tokyo will find the most reliable seasonal transitions there. (For a Fahrenheit breakdown, see japan weather by month fahrenheit on our sister page.)
What is Japan’s weather like in September?
September remains warm (Tokyo highs ~27°C) but less humid than August. Typhoons are most active this month, especially in southern and central Japan. Bring rain gear and check the live forecast above before travel. japan weather september is often a transition to autumn’s clearer skies.
When is the best month to visit Japan for mild weather?
April (cherry blossoms, 15–20°C) and October (autumn colours, 15–22°C) offer the most comfortable temperatures with low rainfall. Avoid June (rainy season) and August (peak heat and humidity) unless you enjoy those conditions.
Does Japan have a rainy season?
Yes, the tsuyu (rainy season) typically runs from early June to mid-July across most of Japan, except Hokkaido. It brings persistent drizzle and high humidity. Southern regions like Okinawa see the rainy season earlier, from May to June.
Learn more about Japan weather or compare with Hong Kong, India, and Guyana. For seasonal details, see our Japan weather November guide. Stay safe with weather warnings during typhoon season.