Japan Weather Today日本語Karuizawa weather today
A highland resort town about an hour from Tokyo by shinkansen, popular as a cool summer escape. Here is today's forecast, the best time to go and what to expect in every season.
Best time to visit Karuizawa
July to August to escape the heat, or October for autumn leaves.
Karuizawa weather through the year
- Days and nights differ a lot: warm afternoons can turn into cold evenings, so pack layers all year.
- Winters are cold, often below freezing at night, with snow from December to March.
- Summers are cooler and less humid than in Tokyo or Osaka, but afternoon thunderstorms are common.
- The rainy season usually runs from early or mid June to late July.
Karuizawa by season
Spring (March to May)
What to do: Spring arrives late, with cherry blossom in late April.
What to wear: Warm layers: frost is still possible in April.
Summer (June to August)
What to do: Much cooler than Tokyo, often around 25°C, but foggy and damp at times.
What to wear: Light clothes for the day, a fleece for the evening, and a rain jacket for thunderstorms.
Autumn (September to November)
What to do: Autumn leaves in mid to late October around Kumoba Pond.
What to wear: A warm jacket; nights get cold from October.
Winter (December to February)
What to do: Cold, dry and sunny, with skiing and outlet shopping.
What to wear: A proper winter coat, thermal layers, gloves, a hat and snow boots.
More than a forecast
- Hour-by-hour forecast with rain timing, feels-like temperature, UV and daily tips.
- Rain radar from JMA, 3 hours back and 15 hours ahead, plus live Himawari satellite clouds.
- Official warnings: heavy rain, heatstroke alerts, earthquakes, tsunami and typhoons, in plain English.
- Trip planner and road trips: the weather for every stop, and every rest stop on your route.
- 7 languages: English, 日本語, Deutsch, Français, Italiano, Español and 한국어.
Get Karuizawa weather in the app
Questions
What is the weather in Karuizawa today?
The 5-day forecast on this page updates automatically. Open the app for the hour-by-hour forecast, rain timing and official JMA warnings for Karuizawa.
When is the best time to visit Karuizawa?
July to August to escape the heat, or October for autumn leaves.
When is the rainy season in Karuizawa?
The rainy season (tsuyu) usually runs from early or mid June to late July.
Does it snow in Karuizawa?
Snow is common from December to March; roads can freeze, so check conditions before driving.
Is there a free weather app for Karuizawa in English?
Yes. Japan Weather Today is free, needs no sign-up and works in English, Japanese, German, French, Italian, Spanish and Korean. It runs in your browser and can be added to your home screen.
