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Hirayu Onsen

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Hirayu Onsen Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Hirayu Onsen year round climate

  • Spring (March–May): Average 5–15°C, mild climate, but relatively high rainfall, especially in April and May. Common activities: Hiking (be aware of changing weather conditions), onsen bathing. Recommended clothing: Light jacket, warm clothing, rain gear.
  • Summer (June–August): Average 20–25°C, hot and humid, frequent rainfall, with July being the rainiest month. Common activities: Summer resort, viewing alpine plants, stream activities. Recommended clothing: Breathable clothing, sun hat, rain gear.
  • Autumn (September–November): Average 8–23°C, comfortable climate, but large temperature difference between morning and evening, relatively high rainfall. Common activities: Autumn leaves viewing, onsen bathing, hiking. Recommended clothing: Comfortable and breathable clothing, light jacket, warm underwear.
  • Winter (December–February): Average -1–8°C, cold and dry, low probability of snowfall. Common activities: Skiing (confirm snow conditions), onsen bathing, enjoying the winter tranquility. Recommended clothing: Thick warm clothing, waterproof jacket, hat, gloves, scarf.

Hirayu Onsen climatological average

Annual average temperature: approx. 12°C / Annual rainfall: approx. 1883 mm / Summer humidity: 70%–80% / Rainiest month: July

Hirayu Onsen monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-1.1°C
85.6
February
0.4°C
85.1
March
5°C
159.9
April
12.1°C
174.3
May
15.2°C
216.8
June
20.1°C
213.6
July
24.7°C
222.8
August
25.1°C
145.9
September
22.8°C
218.2
October
13.9°C
160.6
November
8.3°C
123.2
December
1.8°C
77.8

Hirayu Onsen weather for the next seven days

12/28
Sunday
Light freezing rain
3.5°C/-7.9°C
12/29
Monday
Light freezing rain
5°C/-6.7°C
12/30
Tuesday
Patchy rain nearby
4.1°C/-4.5°C
12/31
Wednesday
Moderate or heavy snow showers
-1.4°C/-9.6°C
1/1
Thursday
Moderate or heavy snow showers
-4.4°C/-9.9°C
1/2
Friday
Patchy light snow
-0.8°C/-7.8°C
1/3
Saturday
Heavy snow
-0.4°C/-7.7°C