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Mount St Louis Moonstone ski resort

North America

Mount St Louis Moonstone Snow Forecast

Closed for the season

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

Closed for the season closed March 22

Weather data is still collected for informational purposes.

Last Snowfall

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7-Day Forecast

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Snow Depth

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Updated: Sep 22, 12:03 AMWeather at base: 229m
SnowSure™ Score2025-26 season
Closed for the season

Mount St Louis Moonstone is closed for the season. Here is when it is usually best to book.

Best months to book: February, January, December. Best weeks: 22 Feb–28 Feb, 15 Mar–21 Mar, 8 Mar–14 Mar.3Dec2Jan1FebMarOpens 4 DecCloses 22 Mar

February

#1 to book

29cm avg · scored 37

January

#2 to book

37cm avg

December

#3 to book

38cm avg

Best weeks to book

  1. #122 Feb28 Febscored 37
  2. #215 Mar21 Marscored 29
  3. #38 Mar14 Marscored 23.3

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

382m

Updated Sep 22, 2026 at 12:03 AM

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7-Day Forecast
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Prev10d
Now22
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Days 814 and every model are in Pro.Unlock with Pro
Past
Today
Forecast

Hourly Forecast

22 Tue
15° /
23 Wed
17° /
24 Thu
17° /
25 Fri
18° /
26 Sat
21° /
27 Sun
19° /
28 Mon
20° /
Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight29 Tue30 Wed1 Thu2 Fri3 Sat4 Sun
Conditions☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️☀️
clearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclear
Summit382 mModeled
Temp°C14°16°16°10°17°10°11°19°12°11°18°12°11°19°12°
Feels like°C11°14°15°16°10°18°11°10°17°11°10°19°12°
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Windkm/h12131112139976377487696454
Mid-mountain306 mModeled
Temp°C15°16°10°17°10°10°18°11°12°20°12°11°19°13°12°19°13°
Feels like°C12°14°16°16°11°19°11°10°17°12°11°19°12°
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Windkm/h12131112139976377487696454
Base229 mModeled
Temp°C15°10°10°17°10°10°17°11°10°18°11°12°20°13°12°19°13°12°20°13°
Feels like°C13°15°16°10°10°17°10°11°19°12°11°18°13°11°20°13°
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Windkm/h12131112139976377487696454
Humidity%855381835484885685905186854682845185885690
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 Mount St Louis Moonstone, 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 Mount St Louis Moonstone (rockies), 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

Eastern Canada region

El Niño Outlook · Winter 2026-27

Mount St Louis Moonstone El Niño rank & forecast

Mount St Louis Moonstone ranks #315 of 488 SnowSure resorts — Tier D, −7% in strong El Niño winters.

Tier DLate bloomer — aim Feb–Mar: Often a bit lighter early (−3% to −8% vs normal). History favors waiting for peak-depth months (often Feb–Mar) rather than skipping the resort.

#315 of 488Tier DLate bloomer — aim Feb–Mar

Strong-event signal: −7% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Mount St Louis Moonstone averaged -7% versus its own 30-year snowfall baseline. Historically this is a timing play rather than a reason to stay home: aim for late winter (February–March) in winter 2026-27. Analog winters: '97-98 -3%, '15-16 -6%, '23-24 -13%. A pattern, not a promise.

'97-98 −3%'15-16 −6%'23-24 −13%

ENSO seasonal analog

History · not a forecast

In 10 past El Niño winters at Mount St Louis Moonstone, ERA5 season snowfall median was 147 cm (58 in), about 3% 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

147cm

10 El Niño winters · 3% below median

All-season median

151cm

Across 30 ERA5 seasons (2026-27)

PhaseSeasonsMedianp25–p75Recent analogs
El Niñocurrent10147cm136cm – 163cm2023, 2019, 2018, 2015, 2014, 2009
La Niña12156cm119cm – 183cm2022, 2021, 2020, 2017, 2011, 2010
ENSO-neutral8169cm140cm – 201cm2025, 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 Mount St Louis Moonstone

How much snow is Mount St Louis Moonstone getting this week?
No significant snow is forecast at Mount St Louis Moonstone over the next 7 days.
What is the 14-day snow forecast for Mount St Louis Moonstone?
The full 14-day forecast for Mount St Louis Moonstone — 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 Mount St Louis Moonstone?
We verify every forecast against what actually fell and publish the results — see our forecast verification pages for model-by-model accuracy, updated continuously.