Karuizawa Weather in June
With daytime temperatures of 23°C (73°F) and nighttime lows of 14°C (57°F), June in Karuizawa brings high temperatures during the day. Do keep in mind that June is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Karuizawa in June
As part of the rainy season, Karuizawa sees around 21 days of rain in June, with an average of 236 mm (9.3 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Karuizawa in June
June in Karuizawa brings high temperatures, with highs of 23°C (73°F) and nights around 14°C (57°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Karuizawa in June
The area experiences a moderate amount of sunshine, with approximately 165 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.If your ideal day consists of dry skies and pleasant temperatures, May typically offers the best circumstances for Karuizawa.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Karuizawa's climate page.
Karuizawa Temperature in June
Min Temperature
14°C (57°F)
Max Temperature
23°C (73°F)
Chance of Rain
69%
Precipitation
236 mm (9.3 in)
Rainy days
21 days
Humidity
70% *
Sunshine
165 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Karuizawa typically stay consistent throughout June, with daily highs averaging around 23°C (73°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 16°C (61°F).
Average temperatures in June
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Historical weather for Karuizawa in June
Browse day-by-day weather records for Karuizawa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Karuizawa historical weather extremes in June
The extremes listed below come from historical weather data collected in Karuizawa from 1976 through 2026.
- The hottest June day on record in Karuizawa reached 34°C (93°F) (June 30, 2022).
- Karuizawa experienced its chilliest June day on June 1, 2011, reaching only 9°C (48°F).
- The coldest night in June in Karuizawa was on June 3, 2016, with a minimum of 1°C (34°F).
- The wettest day in June Karuizawa was on June 3, 2026 with 86 mm (3.4 in) of precipitation.
Best Places in Japan in June
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in June →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Karuizawa in June
Pleasant temperatures in June mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Karuizawa in June
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Karuizawa's climate page.
Temperature Rainfall Sunshine Humidity
See the full Karuizawa climate overview or explore weather in Japan.
