Climate in Karuizawa (Nagano), Japan

The graphs below show the monthly weather averages over the year.
* Data from nearest weather station: Yamanashi, Japan (72 KM, 44 Miles).

Average day and night temperature

The mean minimum and maximum temperatures over the year. Show in Fahrenheit

Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Monthly precipitation

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

Monthly rainy days

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

Average humidity

The mean monthly relative humidity over the year

Weather Forecasts for Karuizawa (Nagano)

SAT Jun 19
16°C | 14°C

Heavy rain

SUN Jun 20
24°C | 14°C

Patchy rain possible

MON Jun 21
23°C | 13°C

Patchy rain possible

The best time of year to visit Karuizawa in Japan

Here are some average weather facts we collected from our historical climate data:

  • During the month of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20 degrees Celsius (68°F) and 25 degrees Celsius (77°F).
  • On average, the warmest month(s) are July, August and September.
  • A lot of rain (rainy season) falls in the month of: May, June, July and September.
  • The warmest month is August with an average maximum temperature of 33°C (91°F).
  • The coldest month is January with an average maximum temperature of 9°C (48°F).
  • September is the most wet month. This month should be avoided if you are not a big fan of rain.
  • January is the driest month.
  • August is the most sunny month.
No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.