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.
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Fortress Mountain at 1800 m altitude
Issued by Snow-Forecast.com at: 5 pm (local time) / 20 Sep 2026
Next 3 days weather summary:Mostly dry. Very mild (max 18°C on Sun afternoon, min 4°C on Tue night). Wind will be generally light. | Days 4-6 weather summary:Light rain (total 7.0mm), mostly falling on Fri afternoon. Freeze-thaw conditions (max 14°C on Thu afternoon, min 0°C on Fri 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 | |
 |  | | |  |  | | | | | | | | |  |  |  | |
clear | clear | clear | clear | some clouds | some clouds | some clouds | clear | some clouds | some clouds | clear | some clouds | some clouds | some clouds | rain shwrs | light rain | rain shwrs | |
km/h | |||||||||||||||||
Snow map |  |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 1 |
max °C | 18 | 10 | 16 | 18 | 10 | 15 | 16 | 9 | 11 | 12 | 6 | 12 | 14 | 8 | 7 | 5 | 2 |
min °C | 17 | 7 | 10 | 16 | 8 | 9 | 15 | 4 | 7 | 11 | 3 | 6 | 13 | 5 | 6 | 4 | 0 |
chill °C | 17 | 5 | 9 | 16 | 7 | 8 | 15 | 2 | 6 | 9 | 2 | 5 | 12 | 2 | 3 | 1 | -4 |
Humid % | 31 | 51 | 57 | 27 | 48 | 54 | 36 | 71 | 75 | 43 | 59 | 53 | 36 | 61 | 85 | 97 | 87 |
Freeze m | 3950 | 4000 | 4000 | 4000 | 3800 | 3600 | 3600 | 3400 | 2900 | 3050 | 2900 | 3100 | 3550 | 3800 | 2750 | 2500 | 2000 |
 | — | — | 7:24 | — | — | 7:26 | — | — | 7:28 | — | — | 7:28 | — | — | 7:31 | — | — |
 | 7:44 | — | — | 7:42 | — | — | 7:38 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — |
Days 7-16 weather summary:
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Avalanche information: Avalanche Canada
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Snow Radar
Latest snow reports near Fortress Mountain:
Fortress Mountain Snow Conditions
| Top snow depth: | — |
|---|---|
| Bottom snow depth: | — |
| Fresh snowfall depth: | — |
| Last snowfall: | 14 Sep 2026 |
| Snow Alerts | Create Alert |
Other resorts in Canada - Alberta 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. |
|---|---|
0.1 | Powder days Fresh snow, limited sun, any wind. |
0.0 | Bluebird days Average snow, mostly sunny, light wind. |
Fortress Mountain Forecast Snowfall
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Photos of Fortress Mountain
Upload new photo Other resorts in Canada - Alberta are reporting: powder (0) / good piste (0)
The above table gives the weather forecast for Fortress Mountain at the specific elevation of 1800 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom ski stations of Fortress Mountain. 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 Canada.
Click here to read further information on freezing levels and how we forecast our temperatures.
Visitor Reviews of Fortress Mountain
Overall 3.3 Based on 2 votes and 10 reviews
- Snowsure
- Variety of pistes
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- Kathleen from Canada writes:
I remember skiing Fortress back in the late 80's and loved it. Hope it will open again - hope they reopen the old lodge too - was a great place to stay - totally old school skiing and lots of good fun.
Visitor Reviews of Fortress Mountain
Kathleen from Canada writes:
I remember skiing Fortress back in the late 80's and loved it. Hope it will open again - hope they reopen the old lodge too - was a great place to stay - totally old school skiing and lots of good fun.
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