Jisan 7-Day Snow Forecast

Jisan Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 22 July 2026 17:41 PDT

Long-Range Snow Forecast for Jisan

Long-range (14 to 45 days) from 23 July.

For Forecast detail, see below.

Jisan Snow Forecast Highlights

When will there be fresh snow in Jisan?

Jisan Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (664ft)
Next Snow?
There is no snow currently in the forecast for Jisan.

Long-range Snow Outlook for Jisan

Snowfall

Snow Line

Max 87°F
Min 73°F

Snow unlikely

Jisan 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 Jisan from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Thu 23	Thunderstorms.	Max 81°F Min 76°F
Fri 24	Light drizzle.	Max 87°F Min 74°F
Sat 25	Light drizzle.	Max 83°F Min 74°F
Sun 26	Rain showers.	Max 85°F Min 74°F
Mon 27	Light drizzle.	Max 87°F Min 73°F
Tue 28	Patchy light rain with thunder.	Max 84°F Min 74°F
Wed 29	Light drizzle.	Max 87°F Min 75°F

No significant snowfall is forecast for this period.

This Snow Forecast for Jisan, South Korea 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 Jisan, 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.

Jisan Snow Forecast updated at 17:41 PDT, next update expected 23:00 PDT.

Ensemble forecast for Jisan, South Korea at 328ft

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

Snow reliability at Jisan is commendable, typically enjoying depths of around 100 cm during peak season. Regular snowfall ensures excellent conditions, but check J2Ski for the latest updates on snow conditions and forecasts.

Off-Piste Safety in Jisan

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