New €155m Les Grands Montets Lift Begins Opening This Winter
Closed since the devastating 2018 fire, the first part of the flagship new Grands Montets lift above Argentière in the Chamonix Valley is set to open this December.
View forecast
Okunakayama Kōgen at 1000 m altitude
Issued by Snow-Forecast.com at: 2 pm (local time) / 20 Sep 2026
Next 3 days weather summary:Heavy rain (total 36.0mm), heaviest during Mon afternoon. Very mild (max 18°C on Sun afternoon, min 12°C on Tue night). Wind will be generally light. | Days 4-6 weather summary:Light rain (total 2.0mm), mostly falling on Thu night. Very mild (max 16°C on Wed afternoon, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | |  |  | |  | | | | |  |  | |
rain shwrs | light rain | mod. rain | heavy rain | mod. rain | light rain | rain shwrs | clear | clear | clear | some clouds | clear | clear | light rain | rain shwrs | some clouds | cloudy | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 2 | 2 | 9 | 12 | 8 | 2 | 1 | — | — | — | — | — | — | 1 | 1 | — | — |
max °C | 18 | 17 | 17 | 17 | 16 | 14 | 14 | 13 | 15 | 16 | 14 | 16 | 16 | 12 | 14 | 14 | 13 |
min °C | 17 | 17 | 17 | 17 | 15 | 14 | 14 | 12 | 14 | 14 | 13 | 15 | 14 | 12 | 13 | 12 | 12 |
chill °C | 17 | 17 | 17 | 17 | 14 | 12 | 13 | 11 | 14 | 14 | 12 | 14 | 12 | 10 | 12 | 11 | 11 |
Humid % | 83 | 97 | 98 | 94 | 97 | 98 | 90 | 84 | 55 | 64 | 57 | 50 | 51 | 94 | 83 | 65 | 44 |
Freeze m | 4350 | 4550 | 4600 | 4800 | 4800 | 4800 | 4550 | 4100 | 4100 | 4100 | 3950 | 3700 | 3800 | 3700 | 3650 | 3700 | 3450 |
 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — |
 | 5:37 | — | — | 5:35 | — | — | 5:32 | — | — | 5:31 | — | — | 5:30 | — | — | 5:28 | — |
Days 7-16 weather summary:
Interested in the 16-day Forecast? Unlock the full forecast and many more features by becoming a Pro member.
SnowPro
Hourly & 16-day forecasts- View past weather
- Fast, ad-free browsing
- Snow hindcasts & History
Unlocks app & website
Avalanche information: Japan Avalanche Network
Popular Okunakayama Kōgen Pages
Snow Radar
Latest snow reports near Okunakayama Kōgen:
Okunakayama Kōgen Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 11 Apr 2026 |
| Snow Alerts | Create Alert |
Other resorts in Japan - Iwate are reporting: powder (0) / good piste (0)
Snow-Forecast Partner Offers
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. |
Okunakayama Kōgen Forecast Snowfall
Sign up or Login to accessSnow-Forecast Partner Offers
Other resorts in Japan - Iwate are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Okunakayama Kōgen at the specific elevation of 1000 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Okunakayama Kōgen. 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.
Resort name is also written as Okunakayama Kogen.
Visitor Reviews of Okunakayama Kōgen
Nearest