Next 3 days weather summary:Moderate rain (total 11.0mm), heaviest on Fri morning. Warm (max 23°C on Sat morning, min 17°C on Thu morning). Wind will be generally light. | Days 4-6 weather summary:Heavy rain (total 57.0mm), heaviest during Mon night. Warm (max 28°C on Mon morning, min 18°C on Tue night). Wind will be generally light. | |||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | |  | | |  | | | |  |  | |  | |
cloudy | cloudy | rain shwrs | mod. rain | some clouds | some clouds | cloudy | rain shwrs | some clouds | some clouds | t-storm risk | rain shwrs | some clouds | t-storm risk | heavy rain | heavy rain | mod. rain | light rain | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | 3 | 6 | — | — | — | 2 | — | — | 3 | 1 | — | 4 | 23 | 12 | 10 | 4 |
max °C | 18 | 18 | 18 | 17 | 18 | 17 | 23 | 23 | 20 | 27 | 26 | 22 | 28 | 25 | 21 | 20 | 19 | 19 |
min °C | 17 | 18 | 17 | 17 | 18 | 17 | 20 | 20 | 20 | 24 | 24 | 21 | 26 | 23 | 20 | 20 | 19 | 18 |
chill °C | 17 | 18 | 17 | 17 | 18 | 17 | 20 | 20 | 20 | 24 | 24 | 21 | 26 | 23 | 20 | 20 | 19 | 18 |
Humid % | 89 | 84 | 87 | 99 | 92 | 87 | 76 | 75 | 88 | 70 | 75 | 88 | 67 | 78 | 98 | 99 | 99 | 99 |
Freeze m | 4750 | 4650 | 4600 | 4600 | 4600 | 4500 | 4600 | 4600 | 4750 | 4750 | 4800 | 4850 | 4800 | 4750 | 4650 | 4600 | 4550 | 4400 |
 | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 6:00 | — | — | 5:59 | — | — | 5:58 | — | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — |
SnowProGo pro and carve into:
Avalanche information: Japan Avalanche Network
Latest snow reports near Koshi Kogen:
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 12 Mar 2026 |
| Snow Alerts | Create Alert |
0.0 | Bluebird Powder days Fresh snow, mostly sunny, light wind. |
|---|---|
0.0 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
The above table gives the weather forecast for Koshi Kogen at the specific elevation of 392 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Koshi Kogen. To access the weather forecasts for the other elevations, use the tab navigation above the table. For a wider view of the weather, check out the Weather Map of Japan.
Click here to read further information on freezing levels and how we forecast our temperatures.
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