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Koshinetsu

Koshinetsu 1
Travel Info
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Travel Info

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Koshinetsu Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Koshinetsu year round climate

  • Spring (March–May): Average 50–66°F, mild climate but with relatively high rainfall, especially abundant in April and May. Common activities: Spring outings, flower viewing. Recommended clothing: Light jacket, long-sleeved shirt, rain gear essential.
  • Summer (June–August): Average 74–85°F, hot and humid, frequent rainfall. Common activities: Sightseeing in summer resorts, water activities (such as river rafting, please pay attention to safety). Recommended clothing: Light and breathable clothing, sun hat, rain gear.
  • Autumn (September–November): Average 66–80°F, comfortable and pleasant climate, rainfall gradually decreasing. Common activities: Maple viewing, mountain hiking. Recommended clothing: Light jacket, long-sleeved shirt.
  • Winter (December–February): Average 41–44°F, cold and dry, low rainfall. Common activities: Skiing, onsen experience. Recommended clothing: Warm jacket, beanie, gloves, scarf.

Koshinetsu climatological average

Annual average temperature: approx. 62.6°F / Annual rainfall: approx. 1656 mm / Summer humidity: 70%–80% / Rainiest month: August

Koshinetsu monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
41.2°F
47.4
February
43°F
72.5
March
50.9°F
131.3
April
61.5°F
182.2
May
66.7°F
199.8
June
74.7°F
248.8
July
84°F
176
August
85.1°F
254.7
September
80.8°F
127.3
October
66.4°F
105.2
November
57°F
91.9
December
45°F
19.2

Koshinetsu weather for the next seven days

8/12
Wednesday
Patchy rain nearby
79.4°F/74.4°F
8/13
Thursday
Patchy rain nearby
87.6°F/73.4°F
8/14
Friday
Sunny
92.9°F/71.9°F
8/15
Saturday
Partly Cloudy
91.6°F/74.4°F
8/16
Sunday
Patchy rain nearby
92.9°F/74.5°F
8/17
Monday
Patchy rain nearby
90.1°F/75.7°F
8/18
Tuesday
Partly Cloudy
93.9°F/76.8°F