Alt St. Johann 7-Day Snow Forecast

Alt St. Johann Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 21 March 2026 05:41 AEDT

Long-Range Snow Forecast for Alt St. Johann

Long-range (14 to 45 days) from 20 March.

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 (1,581m)
Next Snow Expected	23 March
Next Snow Amount	1cm
Next 48 Hours	1cm
Next 7 Days	32cm

Long-range Snow Outlook for Alt St. Johann

Snowfall

Snow Line

Max 10℃
Min -4℃

23cm New Snow

Snow Line from 1,731m to resort level (900m).

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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
Fri 20	Clear spells.	Max 9℃ Min 0℃
Sat 21	up to 1cm New Snow Cloudy. Snow Line from 1,608m to 946m, with rain below.	Max 8℃ Min 1℃
Sun 22	1cm New Snow Light snow showers. Snow falling to resort level (900m).	Max 10℃ Min 0℃
Mon 23	1cm New Snow Light snow. Snow Line from 1,485m to resort level (900m).	Max 6℃ Min 0℃
Tue 24	Clear spells.	Max 10℃ Min -1℃
Wed 25	6cm to 8cm New Snow Light snow showers. Snow Line from 1,731m to resort level (900m).	Max 8℃ Min -2℃
Thu 26	12cm New Snow Heavy snow showers. Snow falling to resort level (900m).	Max -1℃ Min -4℃

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 05:41 AEDT, next update expected 11:00 AEDT.

Ensemble forecast for Alt St. Johann, Switzerland at 900m

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 Forecast near Alt St. Johann

Snow Forecasts for Ski Resorts near Alt St. Johann
Ski Area	48 Hr	7 Day
Flumserberg	3cm	43cm
Laterns	2cm	38cm
Dunserberg	2cm	36cm
Unteriberg	1cm	35cm
Flims	3cm	34cm
Wildhaus	3cm	29cm
Gommiswald	-	27cm

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.