Start planning your trip
2025/04/07 - 2025/04/14
With: 
Karuizawa Weather From March to August: What to Wear and Top Spots
This service includes sponsored advertisements.
This article summarizes Karuizawa's weather features and temperatures from March to August. We've also included tips on what to wear and suggested tourist spots.
Karuizawa: Known for Its Cool and Humid Climate
Karuizawa in Nagano Prefecture, famous as a summer resort and villa area, is situated at an elevation of around 1,000 meters, characterized by its cool climate.
Even in August, the hottest month of the year, the average temperature is about 6°C lower compared to Tokyo. On the other hand, winters are quite cold, with many days experiencing sub-zero temperatures.
Additionally, the area receives a significant amount of rainfall year-round, with sudden showers and thunderstorms being described as one of the "special features of Karuizawa." With an average humidity of around 80%, the climate is quite humid. The area typically experiences fog for about 150 days each year.
Karuizawa Weather Guide: March - August
March-April: Spring Arrives a Little Late in Karuizawa
What to Wear in Spring in Karuizawa: Warm Clothing is a Must!
Best Tourist Spots in Spring Karuizawa
Climate Data for Spring in Karuizawa
May-June: Early Summer in Karuizawa is Pleasantly Cool
What to Wear in Early Summer in Karuizawa: A Light Jacket is Fine
Best Tourist Spots in Early Summer Karuizawa
Climate Data for Early Summer in Karuizawa
July-August: Comfortable Summer but Watch Out for Rain and Thunder
What to Wear in Summer: Short Sleeves are Comfortable
Best Tourist Spots in Summer Karuizawa
Climate Data for Summer in Karuizawa
Reference: Japan Meteorological Agency Website Various Data and Materials (Japanese)
March-April: Spring Arrives a Little Late in Karuizawa
Karuizawa, known for its harsh winter cold, remains chilly in March, with an average temperature of just 1.1°C. There are still days with snowfall, a sign that the arrival of spring is still some time away.
The weather gradually warms up when April arrives, but it's still necessary to be prepared for the cold. The temperature difference between day and night can be significant, so carrying warm clothing is recommended.
Typically, cherry blossoms in Karuizawa bloom around mid-April. The best viewing period usually occurs from late April to early May. For many years, the cherry blossoms lasted well into Golden Week, bustling with tourists at popular hanami (flower viewing) spots.
What to Wear in Spring in Karuizawa: Warm Clothing is a Must!
Since March still has cold weather, it's important to wear thermal underwear and winter coats for adequate warmth. Given days of snowfall, it's also advisable to choose comfortable boots or rain boots for walking.
In April, temperatures begin to rise slightly. However, since the nights can quickly become cold, be sure to bring along a coat or a thick scarf as proper warm clothing.
During the day, the highest temperature can reach around 15°C. We recommend layering a jacket over a knit or sweater to allow for temperature regulation.
Best Tourist Spots in Spring Karuizawa
1. Karuizawa Prince Shopping Plaza
Karuizawa Prince Shopping Plaza is a popular outlet destination nestled in the beautiful natural surroundings of Karuizawa. With a wide variety of brand-name shops, boutiques, and dining options, it offers a perfect blend of shopping and leisure.
At the same time, the Karuizawa Prince Shopping Plaza is one of the premier cherry blossom viewing spots in Karuizawa. It is located just a 3-minute walk from the South Exit of Karuizawa Station, providing easy access by train as well.
Adjacent to the Karuizawa Prince Hotel, the area features approximately 300 cherry trees, including Somei Yoshino and Shidarezakura varieties. Therefore, visitors can freely enjoy hanami (flower viewing) to their heart's content. It's the perfect place to take in the beauty of spring while indulging in shopping and dining.
| Karuizawa Prince Shopping Plaza | |
| Address | Karuizawa, Kitasaku District, Nagano Prefecture |
| Contact | 0267-42-5211 |
| Access | [By Car] 14 minutes from Usui-Karuizawa Interchange (IC) [By Train] 3-minute walk from JR Hokuriku Shinkansen via Karuizawa Station |
| Official Website | Karuizawa Prince Shopping Plaza |
2. Former Karuizawa Jinguji Temple
The Former Karuizawa Jinguji Temple is located along Old Karuizawa Ginza Street. In spring, the weeping cherry tree, estimated to be around 400 years old, beautifully blossoms on the temple grounds.
This weeping cherry tree, towering at about 15 meters, presents visitors with a stunning sight. It is said to have been loved by many literary figures, including Yasunari Kawabata, who famously wrote the novel "Snow Country" while admiring its beauty.
(Japanese)
(Japanese)
| Shingon Sect Chisan School Jinguji Temple | |
| Address | Karuizawa, 646, Karuizawa Town |
| Contact | 0267-42-3192 |
| Access | Approximately 20 minutes by foot from JR Hokuriku Shinkansen via Karuizawa Station, about 7 minutes by taxi |
| Official Website | Shingon Sect Chisan School Jinguji Temple |
Climate Data for Spring in Karuizawa
March
Average Temperature: 1.1°C
Average Daily Maximum Temperature: 7.8°C
Average Daily Minimum Temperature: -4.5°C
Average Total Rainfall: 68.3 mm
Average Number of Fog Days: 11.7 days
Average Number of Thunder Days: 0.2 days
Average Number of Snow Days: 15.4 days
April
Average Temperature: 7°C
Average Daily Maximum Temperature: 14.3°C
Average Daily Minimum Temperature: 0.6°C
Average Total Rainfall: 81.0 mm
Average Number of Fog Days: 11.2 days
Average Number of Thunder Days: 0.5 days
Average Number of Snow Days: 4.8 days
Reference: Japan Meteorological Agency Website Various Data and Materials (Japanese)
May-June: Early Summer in Karuizawa is Pleasantly Cool
When May arrives, the sharp drops in temperature become less frequent, leading to a gradually warming climate as summer approaches. Although it can still feel a bit chilly, there are days when the maximum temperature reaches close to 20°C, making it possible to enjoy lighter clothing.
The rainy season in Karuizawa typically starts around mid-June. However, rainfall gradually increases from May. It's wise to prepare rain gear such as foldable umbrellas or raincoats.
Even though the weather can be quite variable, the climate is relatively stable from May to June, making it a cool and comfortable season.
What to Wear in Early Summer in Karuizawa: A Light Layer is Fine
During the day, you can feel the warmth of early summer, so wearing long-sleeve shirts or light sweaters is generally acceptable. However, it can still be somewhat chilly. We recommend bringing along a light coat or jacket for layering.
Best Tourist Spots in Early Summer Karuizawa
1. Kumoba Pond
Kumoba Pond, nicknamed the “Swan Lake,” is a stunning spot that offers serene views and beautiful nature. The area is famous for its picturesque scenery, especially during the times when the surrounding trees and flowers bloom in early summer.
Visitors can stroll along the pond's edge, enjoy a peaceful walk, and take in the beauty of nature. It’s an ideal location for photography enthusiasts and those seeking a tranquil escape.
Kumoba Pond is a place in Karuizawa where visitors can appreciate the beauty of nature amidst many scenic spots. It was once known as "Swan Lake" since swans used to visit during the winter.
Around the pond, there is a walking path of about 1 km that allows for strolls while enjoying the natural surroundings of Karuizawa.
2. Karuizawa Lake Garden
Karuizawa Lake Garden is another enchanting location where visitors can experience the joys of nature. This beautiful garden features a variety of seasonal flowers, lush greenery, and peaceful water features. It is the perfect spot for relaxing walks and picnics.
The garden also has carefully designed areas where you can sit and admire the views, making it an ideal place for nature lovers and photographers alike. With its picturesque landscapes and serene atmosphere, the Karuizawa Lake Garden is a must-visit during the early summer months.
Karuizawa Lake Garden (*) is a vast British-style garden consisting of eight areas centered around a lake. It is especially recommended to visit in early summer. About 3,500 rose bushes bloom beautifully in June, creating a stunning floral display.
*Karuizawa Lake Garden is temporarily closed as of March 2025.
| Karuizawa Lake Garden | |
| Address | Lake New Town, Karuizawa, Kitasaku District, Nagano Prefecture |
| Contact | 0267-48-1608 |
| Opening Hours | 9:00 AM–5:00 PM |
| Access | By Car: Approximately 15 minutes from the Usui-Karuizawa Interchange (IC) on the Joshinetsu Highway By Train: About 10 minutes by taxi from JR Hokuriku Shinkansen via Karuizawa Station |
| Official Website | Karuizawa Lake Garden |
Climate Data for Early Summer in Karuizawa
May
Average Temperature: 12.3°C
Average Daily Maximum Temperature: 19.2°C
Average Daily Minimum Temperature: 6.3°C
Average Total Rainfall: 108.8 mm
Average Number of Fog Days: 10.2 days
Average Number of Thunder Days: 2.4 days
Average Number of Snow Days: 0.0 days
June
Average Temperature: 16.0°C
Average Daily Maximum Temperature: 21.5°C
Average Daily Minimum Temperature: 11.8°C
Average Total Rainfall: 154.6 mm
Average Number of Fog Days: 15.3 days
Average Number of Thunder Days: 2.2 days
Average Number of Snow Days: 0.0 days
Reference: Japan Meteorological Agency Website Various Data and Materials (Japanese)
July - August: Comfortable Summer but Watch Out for Sudden Rain and Thunder
As a summer resort, Karuizawa truly shines during the summer months. From July to August, the temperature remains comfortable throughout the day, with rarely any sudden drops in temperature.
Even in August, when temperatures typically peak, it seldom exceeds 30°C. However, in recent years, due to the impact of nationwide extreme heat, the maximum temperatures have been higher than usual.
This period is also known for having the most thunderstorms of the year, with significantly increased rainfall. It's essential to carry rain gear, and it's advisable to wear comfortable shoes that are easy to walk in even if it rains.
Additionally, due to the high altitude, UV radiation will be stronger, making it crucial to take measures against heat stroke. It’s a good idea to pack an umbrella or a portable fan in your bag for convenience. Be sure to reapply sunscreen more frequently than usual as well.
What to Wear in Summer in Karuizawa: Short Sleeves are Comfortable
During the day, it can be quite warm when the sun is shining, making short sleeves comfortable enough, even to the point of sweating slightly. However, when the sun goes behind the clouds or rain starts, it can feel chilly, so it's necessary to have a lightweight cardigan or hoodie for layering.
Furthermore, in preparation for sudden thunderstorms, opt for footwear like sneakers or short boots rather than sandals or heels, as these will keep your feet dry and make it easier to walk.
Best Summer Spots in Karuizawa
1. Shiraito Falls
Shiraito Falls is one of the picturesque attractions in the area, with its beautiful cascading waters surrounded by lush greenery. The falls create a serene atmosphere, making it a perfect spot for nature walks and photography.
The tranquil sound of the water and the stunning views make it a must-visit destination during the summer months in Karuizawa.
Shiraito Falls features a rock face that extends 3 meters in height and 70 meters in width, adorned with hundreds of white, silk-like streams of water cascading down. During the summer, the falls are beautifully illuminated, and there are enchanting projection mapping events, making it a refreshing tourist spot with a magical atmosphere.
2. Karuizawa Taliesin
Karuizawa Taliesin is a scenic cultural complex situated on the shores of Lake Shiozawa. This recreational area features beautiful gardens, art galleries, and walking paths, allowing visitors to immerse themselves in nature while enjoying art and architecture.
You can take a leisurely stroll along the lake, admire the beautiful landscapes, and explore the various buildings inspired by Frank Lloyd Wright's designs. Taliesin is an ideal spot for families and couples to relax and enjoy a day out surrounded by stunning scenery.
Karuizawa Taliesin is a vast facility centered around Lake Shiozawa, featuring beautiful gardens, museums, historical buildings, and restaurants. In the summer, it's recommended to enjoy activities such as boating and go-karting.
The indoor facilities are well-equipped, allowing for a safe visit even in the event of sudden thunderstorms.
| Karuizawa Taliesin | |
| Address | 217 Nagakura Shiozawa, Kitasaku District, Karuizawa Town |
| Contact | 0267-46-6161 |
| Opening Hours | 9:00 AM–5:00 PM |
| Access | By Car: Approximately 15 minutes from the Usui-Karuizawa Interchange (IC) on the Joshinetsu Highway By Train: About 10 minutes by taxi from JR Nagano Shinkansen via Karuizawa Station or Shinano Railway via Naka-Karuizawa Station |
| Official Website | Karuizawa Taliesin |
Climate Data for Summer in Karuizawa
July
Average Temperature: 20.1°C
Average Daily Maximum Temperature: 25.3°C
Average Daily Minimum Temperature: 16.4°C
Average Total Rainfall: 191.8 mm
Average Number of Fog Days: 17.9 days
Average Number of Thunder Days: 4.5 days
Average Number of Snow Days: 0.0 days
August
Average Temperature: 20.8°C
Average Daily Maximum Temperature: 26.3°C
Average Daily Minimum Temperature: 17.1°C
Average Total Rainfall: 141.6 mm
Average Number of Fog Days: 15.5 days
Average Number of Thunder Days: 5.3 days
Average Number of Snow Days: 0.0 days
Reference: Japan Meteorological Agency Website Various Data and Materials (Japanese)
Frequently Asked Questions
Is it hot in Karuizawa in August?
Even in August, when temperatures peak, Karuizawa maintains an average temperature of around 20°C, providing a cool climate. Days exceeding 30°C are rare. However, in recent years, the effects of nationwide extreme heat have caused average temperatures to be higher than usual.
What should I wear when visiting Karuizawa in April?
In April, the average temperature in Karuizawa is around 7°C. It can still be cold, with some days experiencing snowfall, so you need to prepare adequately for cold weather.
What is the temperature difference between Tokyo and Karuizawa?
The temperature in Karuizawa is typically 6 to 9°C lower than that in Tokyo. Located at an elevation of around 1,000 meters, Karuizawa has a cooler climate throughout the year compared to Tokyo.
What essentials should I bring when going to Karuizawa?
Even in summer, it can feel chilly for extended periods, so a light jacket that you can easily throw on is essential. Additionally, due to frequent thunderstorms, rain, and fog, it's advisable to bring rain gear.
Karuizawa from March to August: Expect Many Chilly Moments
Karuizawa is characterized by its cool climate. The arrival of spring and summer from March to August tends to be about a month later compared to other regions.
Even in August, which typically sees the highest temperatures, there can be days when the minimum temperature drops below 20°C, making it feel quite chilly. Therefore, it's essential not to let the warm daytime temperatures deceive you; dressing in layers that allow for temperature regulation is crucial.
Make sure to bring a cardigan or a light jacket, even in summer, to ensure you are prepared for the cooler moments!
Special Features
More
![[Kyoto] A tour to explore the religious views and culture of Kyoto's historic temples](https://resources.matcha-jp.com/resize/720x2000/2025/04/06-230317.webp)
![[Nakameguro, Tokyo] Fishing experience in VR and making authentic sushi! A new food adventure in Tokyo](https://resources.matcha-jp.com/resize/720x2000/2025/04/01-229923.webp)