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

Europe

Les Trois Vallées Snow Forecast

Closed for the season

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

Closed for the season — closed April 17

Weather data is still collected for informational purposes.

Last Snowfall

Sep 10

10d ago

Past 24 Hours

0cm

Past 48 Hours

0cm

Past 10 Days

0cm

7-Day Forecast

0cm

Snow Depth

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Updated: Sep 20, 8:02 PM•Weather at base: 183m
SnowSure™ Score2025-26 season
Closed for the season

Les Trois Vallées is closed for the season. 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

March

#1 to book

72cm avg · scored 38.3

January

#2 to book

86cm avg

February

#3 to book

68cm avg · scored 35.7

Best weeks to book

  1. #115 Mar – 21 Marscored 45.4
  2. #222 Mar – 28 Marscored 44.2
  3. #38 Mar – 14 Marscored 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

985m
ECMWFGFSGEMJMAICONMétéo-Fr

Updated Sep 20, 2026 at 8:02 PM

0cm
24h
0cm
Past 10d
7-Day Forecast
0
Prev10d
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Now20
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M21
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T22
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W23
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T24
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F25
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S26
Days 8–14 and every model are in Pro.Unlock with Pro
Past
Today
Forecast

Hourly Forecast

20 Sun
11° / -3°
21 Mon
8° / -2°
22 Tue
9° / -6°
23 Wed
7° / -2°
24 Thu
7° / -6°
25 Fri
7° / -6°
26 Sat
10° / -3°
Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight27 Sun28 Mon29 Tue30 Wed1 Thu2 Fri3 Sat
Conditions⛅⛅⛅⛅☁️☁️☀️☀️☀️⛅☀️☀️☀️⛅🌤️⛅⛅🌤️☀️☀️☀️
some cloudssome cloudssome cloudssome cloudscloudycloudyclearclearclearsome cloudsclearclearclearsome cloudsmostly clearsome cloudssome cloudsmostly clearclearclearclear
Summit985 mModeled
Temp°C0°9°1°1°8°0°0°8°-2°0°7°0°-2°6°-2°-2°6°-2°1°9°0°
Feels like°C-3°6°-2°-3°4°-3°-4°5°-5°-3°4°-3°-6°2°-5°-6°2°-5°-3°6°-3°
Snowcm·····················
Precipmm·····················
Windkm/h172272273373293272172
Mid-mountain1,915 mModeled
Temp°C9°18°9°9°16°9°8°16°7°8°15°9°6°15°7°6°15°7°9°18°9°
Feels like°C7°16°7°7°14°7°6°15°5°7°13°7°4°12°4°3°12°4°6°15°6°
Snowcm·····················
Precipmm·····················
Windkm/h172272273373293272172
Base183 mModeled
Temp°C17°27°18°18°25°17°17°25°15°17°24°17°15°23°15°15°23°15°18°26°17°
Feels like°C17°26°18°17°25°18°17°25°16°18°24°18°14°22°15°13°21°15°16°25°17°
Snowcm·····················
Precipmm·····················
Windkm/h172272273373293272172
Humidity%553670604780684789834680623677492167412456
0°C linem—————————————————————
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. Free for 14 days, then yearly.

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

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

JJA 2026 · ANOM +1.8°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 – 585cm2022, 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.