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Granby Ranch ski resort
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Tier C — ENSO-proof

North America

Granby Ranch Snow Forecast

Closed for the season

Best months to book: April, February, March · 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, 4:02 AM•Weather at base: 2,500m
SnowSure™ Score2025-26 season
Closed for the season

Granby Ranch is closed for the season. Here is when it is usually best to book.

Best months to book: April, February, March. Best weeks: 1 Mar–7 Mar, 22 Feb–28 Feb, 29 Mar–4 Apr.NovDecJan2Feb3Mar1AprOpens 26 NovCloses 5 Apr

April

#1 to book

40cm avg · scored 21.2

February

#2 to book

32cm avg · scored 27.4

March

#3 to book

34cm avg · scored 19

Best weeks to book

  1. #11 Mar – 7 Marscored 27.6
  2. #222 Feb – 28 Febscored 27.4
  3. #329 Mar – 4 Aprscored 19.4

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

2,805m
ECMWFGFSGEMJMAICONMétéo-Fr

Updated Sep 22, 2026 at 4:02 AM

0cm
24h
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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
18° / 1°
23 Wed
16° / 3°
24 Thu
16° / 6°
25 Fri
15° / 4°
26 Sat
17° / 1°
27 Sun
18° / 2°
28 Mon
11° / 3°
Days 8–14 and every model are in SnowSure Pro.Unlock with Pro
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight29 Tue30 Wed1 Thu2 Fri3 Sat4 Sun
Conditions☀️🌧️☀️☁️☁️☁️🌧️☁️⛅🌤️🌧️🌤️⛅☀️☀️🌤️🌤️⛅🌧️🌧️☀️
clearlight drizzleclearcloudycloudycloudydrizzlecloudysome cloudsmostly clearlight drizzlemostly clearsome cloudsclearclearmostly clearmostly clearsome cloudslight drizzlelight drizzleclear
Summit2,805 mModeled
Temp°C8°17°6°9°16°7°8°13°8°8°14°7°8°16°6°9°17°7°7°10°5°
Feels like°C6°15°3°7°13°5°6°11°5°6°10°5°5°13°3°6°15°5°3°7°2°
Snowcm·····················
Precipmm·0.90.3···5.01.30.30.20.60.1······0.52.10.4
Windkm/h38731054107418541143739144
Mid-mountain2,653 mModeled
Temp°C9°18°7°10°17°8°9°14°9°9°15°8°9°17°7°9°18°8°8°11°6°
Feels like°C7°16°4°8°14°6°7°12°7°7°11°6°6°15°5°7°16°6°4°8°3°
Snowcm·····················
Precipmm·0.90.3···5.01.30.30.20.60.1······0.52.10.4
Windkm/h38731054107418541143739144
Base2,500 mModeled
Temp°C10°19°8°11°18°9°10°15°10°10°16°9°10°18°8°10°19°9°9°12°7°
Feels like°C8°17°6°9°15°7°9°13°8°8°12°7°7°16°6°8°17°7°6°9°5°
Snowcm·····················
Precipmm·0.90.3···5.01.30.30.20.60.1······0.52.10.4
Windkm/h38731054107418541143739144
Humidity%643881683772946382804376643673613269686275
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 Granby Ranch, 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 Granby Ranch (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

Rockies & Southwest region

El Niño Outlook · Winter 2026-27

Granby Ranch El Niño rank & forecast

Granby Ranch ranks #183 of 488 SnowSure resorts — Tier C, +2% 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.

#183 of 488Tier C — ENSO-proof

Strong-event signal: +2% vs this resort's 30-yr avg

In the three strongest El Niño winters on record ('97-98, '15-16, '23-24), Granby Ranch averaged +2% 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 -21%, '15-16 +6%, '23-24 +22%. A pattern, not a promise.

'97-98 −21%'15-16 +6%'23-24 +22%

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 Granby Ranch, ERA5 season snowfall median was 259 cm (102 in), about 4% above 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

259cm

10 El Niño winters · 4% above median

All-season median

248cm

Across 30 ERA5 seasons (2026-27)

PhaseSeasonsMedianp25–p75Recent analogs
El Niñocurrent10259cm236cm – 268cm2023, 2019, 2018, 2015, 2014, 2009
La Niña12241cm221cm – 278cm2022, 2021, 2020, 2017, 2011, 2010
ENSO-neutral8232cm196cm – 278cm2025, 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.

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Frequently asked questions about Granby Ranch

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