Alt St. Johann 7-Day Snow Forecast

Alt St. Johann Long-Range Snow Forecast Updated today

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Updated 01 September 2026 00:48 PDT

Long-Range Snow Forecast for Alt St. Johann

Long-range (14 to 45 days) from 1 September.

For Forecast detail, see below.

Alt St. Johann Snow Forecast Highlights

When will there be fresh snow in Alt St. Johann?

Alt St. Johann Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (5,187ft)
Next Snow Expected	14 September
Next Snow Amount	2in
Next 48 Hours	-
Next 7 Days	-

Long-range Snow Outlook for Alt St. Johann

Snowfall

Snow Line

Max 87°F
Min 51°F

Snow unlikely

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Alt St. Johann Long-Range (2 weeks+) Snow Forecast Outlook

Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.

16 Day Weather and Snow Forecast for Alt St. Johann from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Tue 01	Clear sky.	Max 69°F Min 51°F
Wed 02	Fair.	Max 70°F Min 54°F
Thu 03	Clear sky.	Max 71°F Min 54°F
Fri 04	Clear sky.	Max 81°F Min 54°F
Sat 05	Clear spells.	Max 78°F Min 64°F
Sun 06	Clear sky.	Max 87°F Min 61°F
Mon 07	Light drizzle.	Max 75°F Min 63°F

This Snow Forecast for Alt St. Johann, Switzerland gives the predicted Snowfall and Freezing Levels for the next week.

The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Alt St. Johann, on any given trail or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.

Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.

Alt St. Johann Snow Forecast updated at 00:48 PDT, next update expected 06:00 PDT.

Ensemble forecast for Alt St. Johann, Switzerland at 2,953ft

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

Snow Reliability

The snow reliability at Alt St. Johann is generally good, with average snow depths often reaching between 50 to 150 cm during peak season. For the latest snow conditions and updates, check J2Ski for accurate and timely information.

Off-Piste Safety in Alt St. Johann

Before skiing or snowboarding off-piste in Alt St. Johann, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.