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Usui Pass

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Usui Pass Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Usui Pass year round climate

  • Spring (March–May): Average 2.9–12.4°C, fluctuating temperatures and increasing rainfall. Be mindful of temperature differences. Common activities: Spring outings, flower viewing (e.g., mountain cherry blossoms). Recommended clothing: Warm jacket, comfortable long pants, layering.
  • Summer (June–August): Average 17.0–21.8°C, warm and humid with frequent showers. Common activities: Hiking, sightseeing in cool places. Recommended clothing: Lightweight and breathable clothing, rain gear.
  • Autumn (September–November): Average 19.4–5.9°C, gradually decreasing temperatures and reduced rainfall. Common activities: Maple leaf viewing. Recommended clothing: Light jacket, comfortable long pants.
  • Winter (December–February): Average -2.8–-0.2°C, cold and dry with little rainfall. Common activities: Skiing (depending on snow conditions), hot spring bathing. Recommended clothing: Thick warm clothing, winter coat, hat, gloves, scarf.

Usui Pass climatological average

Annual average temperature: approx. 9.3°C / Annual rainfall: approx. 1270 mm / Summer humidity: 70%–80% / Rainiest month: June

Usui Pass monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-2.8°C
10.7
February
-2°C
47.2
March
2.9°C
91
April
9.2°C
116.5
May
12.4°C
158.8
June
17°C
197.6
July
21.7°C
174.5
August
21.8°C
131.8
September
19.4°C
154.3
October
11.1°C
103.2
November
5.9°C
70.6
December
-0.2°C
14

Usui Pass weather for the next seven days

3/18
Wednesday
Patchy rain nearby
9.1°C/-0.4°C
3/19
Thursday
Moderate rain
7.1°C/0.5°C
3/20
Friday
Patchy rain nearby
8.8°C/-1.9°C
3/21
Saturday
Sunny
8°C/-4.1°C
3/22
Sunday
Sunny
12.2°C/-2°C
3/23
Monday
Sunny
12.9°C/-0.1°C
3/24
Tuesday
Partly Cloudy
9.4°C/0°C

Usui Pass Frequently Asked Questions and Useful Information for Travel

How long is the Usui Pass?

The Usui Pass is approximately 13 kilometers long and can be driven from end to end in roughly 20 minutes. An interesting detail is that each of its over 180 corners is numbered.

Is the Usui Pass a real place?

Yes, the Usui Pass, known as Usui-tōge in Japanese, is a real mountain pass situated between Nagano and Gunma Prefecture in Japan. It has been a significant transportation route in central Japan since at least the eighth century.

How can I get to the Usui Pass observation platform?

You can reach the Usui Pass observation platform by taking a 10-minute taxi ride from JR Karuizawa Station. Additionally, from late April to late November, the retro Karuizawa Aka Bus operates between Manpei Hotel, Karuizawa Ginza, and the Usui Pass Observation Platform between 9 AM and 2:35 PM.

Is Usui Pass located in Gunma Prefecture?

The Usui Pass itself lies on the border of Nagano and Gunma Prefectures. Lake Usui, a notable feature recognized by its red iron bridge, is located in Annaka City in western Gunma Prefecture.

What can I see or do at Usui Pass?

Usui Pass offers scenic views and a historical journey. You can drive or cycle the winding road, enjoying the numbered corners and the natural beauty of the mountainous region. The observation platform provides panoramic vistas. Nearby, Lake Usui with its distinctive red bridge offers a picturesque setting for a stroll.