Monday 26 | Tuesday 27 | Wednesday 28 | Thursday 29 | Friday 30 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | | | |  | | |  |  | |  | |  |  | |
light rain | light rain | light rain | light rain | light rain | light rain | mod. rain | light rain | light rain | rain shwrs | clear | clear | cloudy | light rain | mod. rain | heavy rain | |
km/h | ||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 4 | 2 | 2 | 3 | 2 | 2 | 10 | 3 | 2 | 1 | — | — | — | 5 | 8 | 13 |
max °C | 14 | 13 | 14 | 14 | 14 | 14 | 12 | 7 | 7 | 6 | 16 | 16 | 12 | 12 | 13 | 13 |
min °C | 12 | 12 | 13 | 13 | 13 | 13 | 6 | 7 | 7 | 4 | 10 | 11 | 10 | 12 | 13 | 12 |
chill °C | 12 | 12 | 13 | 13 | 13 | 11 | 2 | 3 | 4 | 3 | 10 | 10 | 9 | 11 | 13 | 11 |
Humid % | 94 | 89 | 90 | 92 | 96 | 83 | 91 | 78 | 77 | 80 | 60 | 50 | 69 | 84 | 90 | 88 |
Freeze m | 3700 | 3700 | 3850 | 3900 | 3850 | 3150 | 1600 | 1200 | 1250 | 1250 | 2450 | 2900 | 2800 | 3050 | 3200 | 2800 |
 | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | — | 4:53 | — | — | 4:52 | — | — | 4:51 | — | — | 4:50 | — | — | 4:49 | — |
Next 4 days weather summary:Heavy rain (total 30.0mm), heaviest during Tue night. Very mild (max 14°C on Sun night, min 6°C on Tue night). Winds increasing (calm on Mon morning, fresh winds from the NW by Tue night). | Days 5-7 weather summary:Heavy rain (total 33.0mm), heaviest during Fri night. Very mild (max 16°C on Thu morning, min 4°C on Wed night). Winds increasing (calm on Wed night, fresh winds from the W by Sat afternoon). | |||||||||||||||
SnowPro
Hourly & 16-day forecastsView past weatherFast, ad-free browsingSnow hindcasts & HistoryAvalanche 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 340 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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