Alt St. Johann 7-Day Snow Forecast

Alt St. Johann Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 12 May 2026 19:46 UTC

Long-Range Snow Forecast for Alt St. Johann

Long-range (14 to 45 days) from 12 May.

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	12 May
Next Snow Amount	8cm 3in
Next 48 Hours	10cm 4in
Next 7 Days	11cm 5in

Long-range Snow Outlook for Alt St. Johann

Snowfall

Snow Line

Max 12℃ 53°F
Min -2℃ 29°F

22cm 9in New Snow

Snow Line from 2,008m 6,588ft to resort level ( 900m 2,953ft ).

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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 12	5cm to 8cm 2in to 3in New Snow Light snow showers. Snow Line from 1,285m 4,216ft to resort level ( 900m 2,953ft ).	Max 5℃ 42°F Min 1℃ 33°F
Wed 13	up to 2cm up to 1in New Snow Clear spells. Snow Line from 1,469m 4,820ft to 1,362m 4,469ft , with rain below.	Max 10℃ 50°F Min -2℃ 29°F
Thu 14	up to 5cm up to 2in New Snow Light snow at altitude, light drizzle below. Snow Line from 1,731m 5,679ft to 1,085m 3,560ft , with rain below.	Max 7℃ 44°F Min 2℃ 36°F
Fri 15	up to 3cm up to 1in New Snow Light snow. Snow Line from 1,654m 5,427ft to resort level ( 900m 2,953ft ).	Max 6℃ 44°F Min 0℃ 33°F
Sat 16	up to 4cm up to 2in New Snow Light snow showers at altitude, light rain showers below. Snow Line from 1,531m 5,023ft to 1,269m 4,163ft , with rain below.	Max 6℃ 42°F Min 2℃ 36°F
Sun 17	Snow showers at altitude, rain showers below.	Max 11℃ 51°F Min 1℃ 33°F
Mon 18	up to 1cm New Snow Snow showers at altitude, rain showers below. Snow Line from 1,962m 6,437ft to 1,746m 5,728ft , with rain below.	Max 12℃ 53°F Min 3℃ 37°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 piste 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 19:46 UTC, next update expected 01:00 UTC.

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.

Switzerland Hotels Map

Snow Forecast near Alt St. Johann

Snow Forecasts for Ski Resorts near Alt St. Johann
Ski Area	48 Hr	7 Day
Flumserberg	13cm 5in	23cm 9in
Unteriberg	15cm 6in	23cm 9in
Flims	12cm 5in	20cm 8in
Wildhaus	9cm 4in	19cm 8in
Laterns	9cm 4in	13cm 5in
Dunserberg	7cm 3in	8cm 3in
Gommiswald	5cm 2in	5cm 2in

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.