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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 41–59°F, 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 68–77°F, 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 46–73°F, 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 -33–46°F, 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. 53.6°F / Annual rainfall: approx. 1883 mm / Summer humidity: 70%–80% / Rainiest month: July
Hirayu Onsen monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
30°F
85.6
February
32.7°F
85.1
March
41°F
159.9
April
53.8°F
174.3
May
59.4°F
216.8
June
68.2°F
213.6
July
76.5°F
222.8
August
77.2°F
145.9
September
73°F
218.2
October
57°F
160.6
November
46.9°F
123.2
December
35.2°F
77.8
Hirayu Onsen weather for the next seven days
12/24
Wednesday
Moderate rain
40.6°F/30.6°F
12/25
Thursday
Moderate rain
45.6°F/30.6°F
12/26
Friday
Heavy snow
18.7°F/8.3°F
12/27
Saturday
Moderate snow
27.2°F/-1.1°F
12/28
Sunday
Mist
36.4°F/8.3°F
12/29
Monday
Sunny
39.7°F/13.6°F
12/30
Tuesday
Light sleet
36.6°F/24.4°F
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