Rossberg - Oberwil
Rossberg - Oberwil is a ski area in Switzerland, at about 1,232 m. Its mapped area is about 1.6 km across, with 3 marked runs and 1 lift (about 3.3 km of piste in all).
Over the last twelve winters the ERA5 weather model gives it 210 cm of snowfall a season, 1,057th (tied) of 3,069 worldwide and 198th in Switzerland. It swings a lot from year to year: the biggest winter, 2017/18 (294 cm), brought more than twice as much as the leanest, 2016/17 (138 cm). January is usually the snowiest month, with about 63 cm.
Snow depth and the seven-day outlook appear here once snow starts to fall. Until then, the long-run record comes first.
Elevation of the ski area’s centre point, taken from a digital elevation model. It is not the base-to-summit range.
We do not show a snow depth here. The weather model we use reports snow lying on the ground — it knows nothing about grooming or snowmaking, and it is not the base depth a ski area publishes. In Japan we can check our figures against 234 weather stations. Outside Japan there is nothing to check them against, so we do not print a number we have not verified.
How much snow it gets
Measured by us across 3,069 ski areas by one identical method. These are not the resort’s own published figures.
Compared with what is nearby
Within 50 km straight line. Measured the same way, so the ranks compare directly. Ski areas a few kilometres apart share a weather grid cell and can return the same figure.
| Ski area | Distance | Seasonal snowfall | World rank |
|---|---|---|---|
| Wiriehorn | 7.8 km | 242 cm | 787 |
| Jaunpass | 8.5 km | 293 cm | 507 |
| Grimmialp | 8.8 km | 315 cm | 427 |
| Gantrisch Gurnigel | 10 km | 233 cm | 844 |
| Springenboden | 11 km | 242 cm | 787 |
When it falls, and how winters differ
Month by month
Month by month, the most snow falls in January. March brings 76% of January’s snowfall. That is in line with the median for ski areas in Switzerland (76%). In amount, March brings 48 cm, less than the median of 60 cm.
Winter by winter
Across the 12 winters measured, the average is 210 cm, and 7 of them fell short of it. The leanest was 2016/17 with 138 cm; the biggest was 2017/18 with 294 cm (2.1 times as much). For 47% of the 283 ski areas in Switzerland, the leanest winter was the same 2016/17: bad winters tend to hit a whole region at once.
Snowfall each winter (December–March total). The dashed line is the average; the numbers mark the leanest and the biggest winter.
Runs and lifts
Counted from the runs and lifts drawn on OpenStreetMap, within the boundary of the ski area. These are not the resort’s own published figures.
Run map
The shape of the mountain
Which way the slopes face
99% of the vertical on the runs descends to the north or east. Those slopes get the least sun, so the snow lasts longer.
By difficulty
Lift types
- T-bar1
See past trail maps on Skimap.org ↗
Source: OpenSkiMap (© OpenStreetMap contributors, ODbL 1.0). How finely ski areas are drawn varies by region, so treat the counts as indicative. Vertical is the difference between the highest and lowest points of the mapped runs and lifts.
Live Cameras
This ski area does not put a camera on its own slopes. What follows are nearby cameras, not the pistes themselves.
Footage remains the copyright of each operator. JAPANSNOWLINE neither stores nor redistributes it.
Some cameras here are provided by Windy.com. Footage plays in Windy’s own player; we do not store it. Windy.com
Map
Where it sits relative to nearby resorts. For a piste map, see the official site.
More places to look
Guides covering Switzerland
- Everywhere on Earth You Climb for Snow. Japan Is the One Place You Drive Toward the Sea. Across 3,069 ski areas we measure, height and snowfall move together — +0.58 in France, +0.85 in Germany. In Japan the figure is +0.02. The reason is not that elevation stopped working.
- A Black Run in Colorado and a Black Run in Austria Are Not the Same Thing. The Maps Prove It. Across 2,888 ski areas: 39% of American runs are graded advanced or harder, and 9% of Austrian ones. Nobody thinks Austria is four times gentler. The grades are measuring different things.
- How Much Does Snowfall Change From One Winter to the Next? Country by Country Over twelve winters, the typical Japanese ski area's best winter was 2.3 times its worst. In Italy and Chile it was 4.6 times, in New Zealand 4.2. Canada, Finland and Sweden come out steadier than Japan.
Updated: 8 Oct 2026, 00:52