Know the temperature and what to wear in Omachi City
Omachi City is located in the northwestern part of Nagano Prefecture. It is a top-tier mountain tourism area known as the Nagano-side starting point for the Tateyama Kurobe Alpine Route, famous for the Kurobe Dam.
The city center, where 3,000-meter-class mountains loom nearby, sits at an altitude of approximately 700 meters. It experiences seasons unique to high altitudes: a late spring, a short summer, an early autumn, and a long winter. It has an inland climate with significant temperature fluctuations, characterized by cool summers and severe winters. Since the altitude of Ogizawa, the entrance to the popular Tateyama Kurobe Alpine Route, is about 1,344 meters and the Kurobe Dam is about 1,470 meters, please keep in mind that the temperature drops by about 0.6°C for every 100 meters of elevation when preparing your clothing.
Also, in winter, there is heavy snowfall in the mountainous areas, and in most regions, the temperature remains below freezing even during the day. However, it is a tourist destination where you can enjoy superb views on many clear winter days. Please take thorough measures against the cold to enjoy your trip.
Temperature and Clothing in Omachi City
About Temperature and Clothing in Omachi City in Spring (March–May)
Until mid-March, when a silver world spreads out, there is still snowfall and days of biting cold continue. The average temperature in March is 3.5°C, and the average minimum temperature is -1.9°C. Wear thick inner layers, and protect your extremities from the cold with hats, scarves, boots, and the like.
The snow in the city center melts in late March. In mid-April, the Tateyama Kurobe Alpine Route opens, marking the start of the mountain tourism season. Cherry blossoms reach their peak from late April to early May. The average temperature rises to 8.7°C in April and 14.3°C in May, but the average minimum temperature drops to 2.4°C in April and 8.2°C even in May. As the temperature drops further when you go to higher altitudes, you will need midwinter-style coats, such as down jackets.
About Temperature and Clothing in Omachi City in Summer (June–August)
A quintessential summer feature of Omachi City is the spectacular water discharge from Kurobe Dam, which takes place from late June to the end of August. The weather is cool and comfortable for sightseeing, with average temperatures of 18.4°C in June, 22.1°C in July, and 23.5°C in August. However, since there is a difference of nearly 10°C between the average minimum and maximum temperatures each month, you can get by with short sleeves or thin long sleeves during the day, but it is best to have a thicker layer like a hoodie for the mornings and evenings.
If you are heading into the mountains where the weather changes easily, a warm outer layer is essential. A lightweight, windproof windbreaker is recommended.
Blessed with abundant underflow water from the Northern Alps, Omachi City is also famous as a "city of water," where you can fully enjoy lake and river activities in the summer. When you go out, don't forget to carry items for protection against UV rays and insect bites.
About temperatures and clothing in Omachi City in autumn (September to November)
In September, the average temperature drops to about 20°C. The mornings and evenings become colder, and you can feel the arrival of autumn. By late September, the autumn leaves begin to change color from the mountain peaks, taking about a month and a half to reach the foothills. During this period, which sees the final peak of crowds for autumn leaf viewing, clothing inspired by late autumn to early winter in Tokyo is ideal. Long-sleeved items made of warm materials, thick coats, or down vests are recommended. Also, be sure to prepare a hooded outer layer or rain gear in case of sudden rain.
By late October, snow begins to fall in the Northern Alps. In the city, winter arrives with the end of the autumn foliage in early November. With the first snowfall, the average temperature drops to 6.6°C, which is about the same as the average temperature in Tokyo in January. Be sure to dress thoroughly for the cold.
About temperatures and clothing in Omachi City in winter (December to February)
With Kurobe Dam closing for the season on November 30, Omachi City welcomes a quiet winter. Omachi Onsen-kyo, located not far from Ogizawa, is a hidden gem during this time. You can enjoy the unique charm of the countryside, such as open-air baths amidst snowy scenery and meals served around a traditional hearth. Another appeal is the proximity to various ski resorts, allowing for an active stay.
The average winter temperatures are 0.5°C in December, -2.1°C in January, and -1.1°C in February. January is particularly cold, with the average minimum temperature dropping to -6.8°C. However, since indoor areas are very warm, it is convenient to wear highly insulating outerwear that is easy to take off and put on, such as a down coat.
Also, if you are traveling by car, don't forget to equip your vehicle with studless tires or tire chains.
Local supporter in charge of this article
KAI Alps
Nagano Prefecture, Omachi Onsen
A hot spring inn located in Omachi Onsen, the gateway to the Tateyama Kurobe Alpine Route and Hakuba.
Access Approximately 15 minutes by taxi from JR Shinano-Omachi Station
- Accommodation rate example
- Per person per night From ¥18,700