Karuizawa Weather in July
July in Karuizawa brings high temperatures around 27°C (81°F) during the day, dropping to 19°C (66°F) at night, with the most rainfall of the year.
Rainfall in Karuizawa in July
Karuizawa is in the rainy season in July, with rain on around 23 days and an average of 255 mm (10 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Karuizawa in July
July in Karuizawa brings typical temperatures with highs around 27°C (81°F) and lows of 19°C (66°F). Summer occurs in July. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Karuizawa in July
You can expect a moderate amount of sunlight, with approximately 170 hours. Even though this month is part of the wet season, you can still see the sun occasionally.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May typically offers the best weather 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 July
Min Temperature
19°C (66°F)
Max Temperature
27°C (81°F)
Chance of Rain
75%
Precipitation
255 mm (10 in)
Rainy days
23 days
Humidity
74% *
Sunshine
170 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Karuizawa typically rise from around 25°C (77°F) at the start of July to approximately 28°C (82°F) by the end. Nights are pleasant, with lows typically ranging from 16°C (61°F) to 20°C (68°F).
Average temperatures in July
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 July
Historical weather for Karuizawa in July
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 July
Based on 49 years of weather observations in Karuizawa between 1976 and 2025, these are the recorded extremes.
- Karuizawa recorded its highest July temperature of 36°C (97°F) on July 2, 2022.
- The lowest daytime temperature in July was 15°C (59°F), recorded on July 23, 2003.
- Karuizawa registered its coldest July night on July 1, 1976, with temperatures dropping to 10°C (50°F).
Best Places in Japan in July
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in July →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Karuizawa in July
Warm weather calls for comfortable, breathable clothing in July. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Karuizawa in July
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.
