Climate in Karuizawa (Nagano), Japan

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Average monthly minimum and maximum temperature in Karuizawa, Japan

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Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Average monthly hours of sunshine in Karuizawa, Japan

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* Data from: Nagano, Japan (52 KM, 32 Miles).

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Average monthly rainfall, snow, precipitation in Karuizawa, Japan

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Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average monthly rainy days in Karuizawa, Japan

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Average humidity

The mean monthly relative humidity over the year

Average monthly relative humidity in Karuizawa, Japan

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* Data from: Nagano, Japan (52 KM, 32 Miles).

Weather Forecasts for Karuizawa

Fri   Mar 01
6°C | -5°C
W 18 km/h
11 mm
partly cloudy and sleet

partly cloudy and sleet

Sat   Mar 02
0°C | -8°C
W 18 km/h
partly cloudy and no rain

partly cloudy and no rain

Sun   Mar 03
4°C | -8°C
W 18 km/h
partly cloudy and no rain

partly cloudy and no rain

The best time of year to visit Karuizawa in Japan

During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:

  • When is the rainy season in Karuizawa?
    Rainy season in Karuizawa occurs in the months of May, June, July, August, September and October.
  • Which is the warmest month in Karuizawa?
    August has an average maximum temperature of 28°C and is the warmest month of the year.
  • Which is the coldest month in Karuizawa?
    The coldest month is January with an average maximum temperature of 4°C.
  • Which is the wettest month in Karuizawa?
    July tops the wettest month list with 255 mm of rainfall.
  • Which is the driest month in Karuizawa?
    December is the driest month with 63 mm of precipitation.
  • Which is the sunniest month in Karuizawa?
    May is the sunniest month with an average of 209 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.