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Diamond Peak ski resort
Tier C — ENSO-proof

North America

Diamond Peak Snow Forecast

Closed for the season

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

Closed for the season — closed April 5

Weather data is still collected for informational purposes.

Last Snowfall

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Past 24 Hours

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Past 48 Hours

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Past 10 Days

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7-Day Forecast

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Snow Depth

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Updated: Sep 22, 10:02 PM•Weather at base: 1,617m
SnowSure™ Score2025-26 season
Closed for the season

Diamond Peak is closed for the season. Here is when it is usually best to book.

Best months to book: February, March, January. Best weeks: 1 Mar–7 Mar, 22 Feb–28 Feb, 8 Mar–14 Mar.Dec3Jan1Feb2MarAprOpens 12 DecCloses 5 Apr

February

#1 to book

84cm avg · scored 34.7

March

#2 to book

84cm avg · scored 22.6

January

#3 to book

93cm avg

Best weeks to book

  1. #11 Mar – 7 Marscored 33.1
  2. #222 Feb – 28 Febscored 34.7
  3. #38 Mar – 14 Marscored 26.1

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

2,188m
ECMWFGFSGEMJMAICONMétéo-Fr

Updated Sep 22, 2026 at 10:02 PM

0cm
24h
0cm
Past 10d
7-Day Forecast
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Prev10d
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Now22
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W23
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T24
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F25
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S26
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S27
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M28
Days 8–14 and every model are in Pro.Unlock with Pro
Past
Today
Forecast

Hourly Forecast

22 Tue
12° / 0°
23 Wed
14° / -3°
24 Thu
17° / 2°
25 Fri
5° / -2°
26 Sat
9° / -5°
27 Sun
8° / -2°
28 Mon
12° / -2°
Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight29 Tue30 Wed1 Thu2 Fri3 Sat4 Sun5 Mon
Conditions☁️☀️☀️☁️⛅☁️🌤️☁️☀️🌧️🌧️🌧️☁️⛅☁️☁️🌤️☀️☀️☀️☀️
cloudyclearclearcloudysome cloudscloudymostly clearcloudyclearlight drizzledrizzlelight drizzlecloudysome cloudscloudycloudymostly clearclearclearclearclear
Summit2,188 mModeled
Temp°C5°11°2°3°13°1°9°16°6°2°0°1°-2°8°-2°2°7°-1°5°11°2°
Feels like°C2°9°0°0°10°-1°6°12°3°-1°-3°-1°-6°4°-5°-1°4°-4°2°8°-1°
Snowcm·········1.541.3·········
Precipmm·········6.95.77.2·········
Windkm/h38327361141085754293273
Mid-mountain1,903 mModeled
Temp°C6°13°4°5°15°3°11°18°8°4°2°3°0°10°0°4°9°1°6°13°3°
Feels like°C4°11°2°2°12°1°8°14°5°1°-1°1°-4°7°-3°1°6°-2°4°10°1°
Snowcm···········0.2·········
Precipmm·········6.95.77.2·········
Windkm/h38327361141085754293273
Base1,617 mModeled
Temp°C8°15°6°7°17°5°13°20°9°6°4°5°2°12°2°6°11°3°8°15°5°
Feels like°C7°13°4°4°15°3°10°17°7°3°1°3°-1°9°-1°3°8°0°6°12°3°
Snowcm·····················
Precipmm·········6.95.77.2·········
Windkm/h38327361141085754293273
Humidity%815192693488503066989793873585655281693983
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 Diamond Peak, 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 Diamond Peak (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

Pacific Northwest & BC region

El Niño Outlook · Winter 2026-27

Diamond Peak El Niño rank & forecast

Diamond Peak ranks #235 of 488 SnowSure resorts — Tier C, −1% in strong El Niño winters.

Tier C — ENSO-proof: Strong El Niño winters looked like a normal year here — within about ±3% of this resort’s own 30-year snowfall average. Not a jackpot, not a bust: a hedge if you’re planning around El Niño.

#235 of 488Tier C — ENSO-proof

Strong-event signal: −1% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Diamond Peak averaged -1% versus its own 30-year snowfall baseline. El Niño has historically made little difference here — this is an ENSO-proof mountain, for winter 2026-27 as in past events. Analog winters: '97-98 -27%, '15-16 -14%, '23-24 +37%. A pattern, not a promise.

'97-98 −27%'15-16 −14%'23-24 +37%

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 Diamond Peak, ERA5 season snowfall median was 419 cm (165 in), about 16% 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

419cm

10 El Niño winters · 16% below median

All-season median

497cm

Across 30 ERA5 seasons (2026-27)

PhaseSeasonsMedianp25–p75Recent analogs
El Niñocurrent10419cm391cm – 567cm2023, 2019, 2018, 2015, 2014, 2009
La Niña12627cm508cm – 682cm2022, 2021, 2020, 2017, 2011, 2010
ENSO-neutral8487cm388cm – 580cm2025, 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 Diamond Peak

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