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Resort dossier
Aletsch Arena
CH·Valais
Weeks 9–12
Typically -7.7°C · 29cm fresh / week · powder day 51% · mixed 52%
Top elev.
2869m
Base elev.
1950m
Pistes
104km
Lifts
35
Piste mix86km mapped
Blue48%
Red43%
Black4%
Freeride4%
COMPOSITE SCORE
56
Snow84
Typically 92cm
Typical depth92cm
76cm112cm
Travel0
From your origin
Size73
Linked-area piste-km
Fit50
Vibe, terrain, activities
What to expect
What to expect in weeks 9–12
Based on 40 winters of weather data, modelled at ~2011m (not the village). Any single year can be very different.
Typically mixed, around -7.7°C, with 29cm of fresh snow over the week. Powder days hit 51% of the time. Other weeks run stormy.
Icy mornings
2.6 days/week
spring-like in 35% of years
Snow texture
Heavy / wet
spring snow, sticky and slow
Typical wind
10.7 m/s
peaks to 30 m/s
Typical Freezing level
1218 m
0°C isotherm
Powder days
51%
of years see 10cm+
Rain at base
0 days
per week
Storm
41%
of years
Bluebird
7%
of years
Thaw
0%
of years
Mixed
52%
of years
Climatology
What a season here looks like
Each track shows the typical range across 40 winters. The marker shows where your selected weeks sit.
Reliability60cm+
99%
Depth
92cm
Temperature
-7.7°C
Fresh snow
29cm
Snow line
1219m
Wind
10.7 m/s
Transfers
Transfers
| Airport | Drive | Train |
|---|---|---|
| Bern (BRN) | 205 min | |
| Milan Malpensa (MXP) | 210 min | |
| Turin (TRN) | 253 min | |
| Zürich (ZRH) | 251 min |
Method & sources
The composite score weights snow reliability against the historical baseline, pulls in live conditions where available, then adjusts for how much hassle the trip actually is for your group.
- 01ERA5-Land hourly grid → daily SWE & snow depth at the resort cell.
- 02Bias-correct against ground stations (SLF / Météo-France nivôse).
- 03Build per-week climatological percentile · 35 winters.
- 04Anomaly = current week vs. cell's own 30-year baseline.
- 05Snow-sure read at the highest-snow cell within ~15km. When most resorts are bare, ranking shifts toward this, surfacing glaciers in shoulder seasons.
- 06Weight + rank against your origin & vibe profile.
Sources
Snow data sources
Ground stations the score is based on.
- EGH2slf
- BEL2slf