Fresh Snowfall In the Alps
Ski areas in the Alps are celebrating the first significant fresh snowfall of September, with accumulations of up to 20cm (8") reported.
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Koshi Kogen at 444 m altitude
Issued by Snow-Forecast.com at: 2 am (local time) / 15 Sep 2026
Next 3 days weather summary:Heavy rain (total 47.0mm), heaviest during Wed night. Warm (max 21°C on Thu afternoon, min 16°C on Thu night). Wind will be generally light. | Days 4-6 weather summary:Heavy rain (total 24.0mm), heaviest during Sat night. Warm (max 25°C on Sat morning, min 17°C on Fri night). Wind will be generally light. | |||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  | |  |  |  | |  | | | | | | | |
light rain | mod. rain | mod. rain | light rain | light rain | heavy rain | light rain | rain shwrs | some clouds | some clouds | some clouds | clear | some clouds | light rain | heavy rain | some clouds | rain shwrs | some clouds | |
km/h | ||||||||||||||||||
Snow map |  |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 1 | 8 | 6 | 2 | 5 | 22 | 1 | 2 | — | — | — | — | — | 5 | 16 | — | 3 | — |
max °C | 19 | 18 | 18 | 18 | 18 | 17 | 20 | 21 | 17 | 23 | 24 | 18 | 25 | 21 | 19 | 23 | 22 | 19 |
min °C | 19 | 18 | 17 | 18 | 18 | 17 | 18 | 19 | 16 | 20 | 20 | 17 | 22 | 19 | 18 | 21 | 21 | 19 |
chill °C | 19 | 18 | 17 | 18 | 18 | 17 | 18 | 19 | 16 | 20 | 20 | 17 | 22 | 19 | 18 | 21 | 21 | 19 |
Humid % | 94 | 98 | 96 | 96 | 96 | 98 | 88 | 77 | 87 | 69 | 65 | 82 | 68 | 83 | 93 | 83 | 85 | 95 |
Freeze m | 4550 | 4350 | 4350 | 4200 | 4250 | 4150 | 4050 | 4100 | 4150 | 4300 | 4450 | 4600 | 4450 | 4400 | 4350 | 4450 | 4700 | 4800 |
 | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — |
 | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:47 | — | — | 5:46 | — | — | 5:45 | — |
Days 7-16 weather summary:
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Avalanche information: Japan Avalanche Network
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Latest snow reports near Koshi Kogen:
Koshi Kogen Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 12 Mar 2026 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Niigata are reporting: powder (0) / good piste (0)
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Snow History
Week 3 of September has on average:
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. |
Koshi Kogen Forecast Snowfall
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Photos of Koshi Kogen
Upload new photo Other resorts in Japan - Niigata are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Koshi Kogen at the specific elevation of 444 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.
Visitor Reviews of Koshi Kogen
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