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Les Trois Vallées ski resort
Epic PassView resorts
Tier A — Prime El Niño terrain

Europe

Les Trois Vallées Snow Forecast

Projected to open December 5, 2026

Best months to book: March, January, February · last season + 30-yr record

Projected to open Dec 5

Weather data is still collected for informational purposes.

Last Snowfall

Oct 25

5d ago

Past 24 Hours

0cm

Past 48 Hours

0cm

Past 10 Days

12cm

7-Day Forecast

0cm

Snow Depth

--

Updated: Oct 30, 10:05 PM•Weather at base: 600m
SnowSure™ Score2025-26 season
Projected to open Dec 5

Les Trois Vallées is projected to open December 5, 2026. Here is when it is usually best to book.

Best months to book: March, January, February. Best weeks: 15 Mar–21 Mar, 22 Mar–28 Mar, 8 Mar–14 Mar.Dec2Jan3Feb1MarAprOpens 5 DecCloses 17 Apr

Best months to book

  1. #1March72cm avg · last season 38.3
  2. #2January86cm avg
  3. #3February68cm avg · last season 35.7

Best weeks to book

  1. #1 15 Mar – 21 Mar · last season 45.4
  2. #2 22 Mar – 28 Mar · last season 44.2
  3. #3 8 Mar – 14 Mar · last season 39.4

Ranked on 25% last season's SnowSure score (2025-26) · 75% 30-year snowfall and base-depth record. The live score returns when the lifts turn.

Snow Summary

Updated Oct 30 at 10:05 PM

24cm
Season
12cm
Past 10 days48H 0cm · 24H 0cm
0cm
Today
0cm
Next 6 days
Days 8–14 · Pro
1
2
0
7
3
0
Seasontotal
Wed28
Thu29
14 daystotal
—
—
—
—
—
0
—
—
—
—
—
—
—
—
TueOct 20
Wed21
Thu22
Fri23
Sat24
Sun25
Mon26
Tue27
TODAY30
Sat31
SunNov 1
Mon2
Tue3
Wed4
Thu5
Fri6
Sat7
Sun8
Mon9
Tue10
Wed11
Thu12
Freezing line
Snow qualityLight· bestAverage· okayHeavy· wet, skis heavy

Days 8–14 and every model are in SnowSure Pro.Unlock with Pro

No measurement at mid height (1,915m) reached us: past snow shown is the model's estimate at the summit.

Hourly Forecast

30 Fri
0° / -9°
31 Sat
1° / -11°
1 Sun
-3° / -10°
2 Mon
-4° / -14°
3 Tue
-3° / -11°
4 Wed
-4° / -12°
5 Thu
-5° / -11°
Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight6 Fri7 Sat8 Sun9 Mon10 Tue11 Wed12 Thu
Conditions☀️🌤️☀️☀️☀️☀️☀️☀️☀️🌤️🌤️☀️☀️☀️☀️☀️⛅🌤️⛅⛅☁️
clearmostly clearclearclearclearclearclearclearclearmostly clearmostly clearclearclearclearclearclearsome cloudsmostly clearsome cloudssome cloudscloudy
Mid-mountain1,915 mModeled
Temp°C4°7°3°3°7°2°1°3°0°-1°3°-2°0°4°-1°0°4°-1°0°3°-1°
Feels like°C0°5°-1°-1°5°-2°-2°0°-3°-5°-1°-6°-3°0°-5°-4°0°-6°-4°-1°-5°
Snowcm········0.1············
Precipmm········0.1·······0.10.10.1··
Windkm/h152353381252262555897
Summit3,230 mModeled
Temp°C-5°-2°-5°-5°-1°-6°-6°-6°-8°-8°-5°-9°-7°-5°-8°-8°-5°-9°-9°-6°-10°
Feels like°C-9°-5°-11°-10°-4°-12°-11°-10°-13°-14°-10°-15°-12°-9°-15°-14°-9°-15°-13°-11°-14°
Snowcm········0.1······0.10.10.20.3·0.2
Precipmm········0.1······0.10.10.20.3·0.2
Windkm/h152353381252262555897
Base600 mModeled
Temp°C12°15°11°12°16°11°10°11°9°8°12°7°9°13°8°9°12°8°8°11°7°
Feels like°C10°15°9°9°15°8°8°10°7°5°9°4°6°10°4°5°10°4°6°8°5°
Snowcm·····················
Precipmm········0.1·······0.10.10.3·0.2
Windkm/h152353381252262555897
Humidity%715678685083686878706784445069775084776584
0°C linem—————————————————————
Sunhours

Freeze line is the height where rain turns to snow. Plain: straight from the models. Marked ○: estimated from temperature. Sun is hours of actual sunshine, not day length; blank means we have no reading.

Forecast Range · SnowSure Pro

Every model for Les Trois Vallées, side by side for 14 days

Where the models agree, where they split, and which one has been most accurate here.

Unlock with Pro

SnowSure™ blend — verified model weighting

The black line is not a simple average. For Les Trois Vallées (alps), we combine seven global weather models using weights learned from daily forecast verification — comparing each model's prediction to measured snowfall (SNOTEL, resort reports, ERA5).

  • 1.Horizon buckets: days 1–3, 4–7, and 8–14 each get separate weights — short-range skill differs from long-range.
  • 2.Regional calibration: weights come from verified error in this geography (Rockies, Alps, Japan, etc.), recalculated weekly.
  • 3.Ground truth only: we never grade a forecast against another model — only against measured snow.

Building verification history for this resort.

How we verify forecasts →

Snowfall Forecast Maps

The Alps region

14 Day map is in SnowSure ProUnlock with Pro

El Niño Outlook · Winter 2026-27

Les Trois Vallées El Niño rank & forecast

Les Trois Vallées ranks Under review SnowSure resorts — Tier A, +9% in strong El Niño winters.

Tier A — Prime El Niño terrain: Historically snowed much more than normal in strong El Niño winters (≥ +8% vs this resort’s own 30-year average).

Under reviewTier A — Prime El Niño terrain

Strong-event signal: +9% vs this resort's 30-yr avg

This resort carries no separate rank: its 30-year record is identical to val-thorens, which is the ranked entry for this measurement. At ~31km resolution the reanalysis cannot resolve them as different mountains, so publishing both would be publishing one number twice.

'97-98 −17%'15-16 −4%'23-24 +47%

Signal = average snowfall in the three strongest El Niño winters since 1996 ('97-98, '15-16, '23-24) vs this resort's own 30-year ERA5 baseline. n=3 — a lean, not a law. Updated monthly against measured snowfall Dec–Mar.

Full El Niño report →

ENSO seasonal analog

History · not a forecast

In 10 past El Niño winters at Les Trois Vallées, ERA5 season snowfall median was 460 cm (181 in), about 9% below this resort’s long-term median. This is a historical analog from reanalysis — not a prediction of this winter’s storm track.

Prevailing ONI

El Niño

JAS 2026 · ANOM +2.16°C

Analog season median

460cm

10 El Niño winters · 9% below median

All-season median

505cm

Across 30 ERA5 seasons (2026-27)

PhaseSeasonsMedianp25–p75Recent analogs
El Niñocurrent10460cm415cm – 631cm2023, 2019, 2018, 2015, 2014, 2009
La Niña12513cm475cm – 584cm2022, 2021, 2020, 2017, 2011, 2010
ENSO-neutral8526cm493cm – 549cm2025, 2024, 2016, 2013, 2012, 2003

Season snowfall from Open-Meteo ERA5 reanalysis (~9 km). ENSO phase from NOAA CPC Oceanic Niño Index. Relative phase differences are more trustworthy than absolute cm totals. Source: NOAA CPC Oceanic Niño Index + Open-Meteo ERA5 via SnowSure season archive.

Local Reports

0 reports

How accurate is this forecast?

We verify every forecast against what actually fell — see the model-by-model results.

→

Frequently asked questions about Les Trois Vallées

How much snow is Les Trois Vallées getting this week?
No significant snow is forecast at Les Trois Vallées over the next 7 days.
What is the 14-day snow forecast for Les Trois Vallées?
The full 14-day forecast for Les Trois Vallées — the SnowSure™ blend and every model we track, day by day — is part of SnowSure Pro. The first 7 days are free on this page.
How accurate are SnowSure forecasts for Les Trois Vallées?
We verify every forecast against what actually fell and publish the results — see our forecast verification pages for model-by-model accuracy, updated continuously.