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Hakkaisan

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Hakkaisan Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Hakkaisan year round climate

  • Spring (March–May): Average 34–51°F, cold and humid climate with significant rainfall. Be sure to dress warmly. Common activities: Hiking (prepare for rain). Recommended clothing: Waterproof jacket, warm clothing, hiking boots.
  • Summer (June–August): Average 58–68°F, warm and humid climate with frequent rainfall, especially in August. Common activities: Beat the heat (choose indoor activities or lower altitudes), appreciate mountain scenery. Recommended clothing: Light and breathable clothing, rain gear.
  • Autumn (September–November): Average 50–63°F, cool climate with gradually decreasing rainfall. Common activities: Viewing autumn leaves (depending on altitude and tree species), hiking. Recommended clothing: Comfortable long-sleeved clothing, light jacket.
  • Winter (December–February): Average -3.7–-33.4°F, cold and dry climate with the least rainfall. Common activities: Skiing (depending on snow conditions), appreciating snow scenery. Recommended clothing: Heavy warm clothing, waterproof jacket, snow boots.

Hakkaisan climatological average

Annual average temperature: approx. 46.2°F / Annual rainfall: approx. 1974 mm / Summer humidity: 70%–80% / Rainiest month: August

Hakkaisan monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
25.3°F
43.3
February
26.6°F
60.7
March
34.3°F
142.1
April
44.8°F
148.4
May
51.1°F
254.7
June
58.8°F
232
July
67.8°F
198.4
August
68°F
335.4
September
63.3°F
279.4
October
50°F
145.4
November
41.7°F
107.7
December
30.6°F
27

Hakkaisan weather for the next seven days

3/19
Thursday
Moderate rain
44.2°F/35.9°F
3/20
Friday
Patchy rain nearby
48.3°F/29.3°F
3/21
Saturday
Patchy rain nearby
44.1°F/26.1°F
3/22
Sunday
Sunny
55.1°F/28.5°F
3/23
Monday
Patchy rain nearby
55.8°F/33.9°F
3/24
Tuesday
Patchy rain nearby
45.9°F/33.7°F
3/25
Wednesday
Sunny
51°F/28.9°F