Biwako Valley 7-Day Snow Forecast

Biwako Valley Long-Range Snow Forecast Updated today

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Updated 14 November 2026 21:48 UTC

Long-Range Snow Forecast for Biwako Valley

Long-range (14 to 45 days) from 15 November.

For Forecast detail, see below.

Biwako Valley Snow Forecast Highlights

When will there be fresh snow in Biwako Valley?

Biwako Valley Snow Forecast Highlights - JMA
Snowfall prediction at mid-mountain (1,057m)
Next Snow Expected	19 November
Next Snow Amount	2cm 1in
Next 48 Hours	- -
Next 7 Days	82cm 32in

Long-range Snow Outlook for Biwako Valley

Snowfall

Snow Line

Max 12℃ 53°F
Min -1℃ 30°F

85cm 33in New Snow

Snow falling to resort level ( 940m 3,084ft ).

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Biwako Valley 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 Biwako Valley from OpenMeteo(JMA)
	Snow and Weather	Temp Town
Sun 15	Drizzle.	Max 12℃ 53°F Min 8℃ 47°F
Mon 16	Cloudy.	Max 8℃ 46°F Min 5℃ 42°F
Tue 17	Fair.	Max 8℃ 47°F Min 4℃ 39°F
Wed 18	Light drizzle.	Max 11℃ 51°F Min 7℃ 44°F
Thu 19	2cm to 4cm 1in to 2in New Snow Light snow. Snow falling to resort level ( 940m 3,084ft ).	Max 8℃ 47°F Min 1℃ 33°F
Fri 20	41cm to 48cm 16in to 19in New Snow Heavy snow. Snow falling to resort level ( 940m 3,084ft ).	Max 1℃ 33°F Min -1℃ 30°F
Sat 21	27cm to 33cm 11in to 13in New Snow Snow showers at altitude, light rain below. Snow falling to resort level ( 940m 3,084ft ).	Max 1℃ 34°F Min -1℃ 30°F

This Snow Forecast for Biwako Valley, Japan 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 Biwako Valley, 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.

Biwako Valley Snow Forecast updated at 21:48 UTC, next update expected 03:00 UTC.

Ensemble forecast for Biwako Valley, Japan at 940m

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.

Japan Accommodation (Apartments, Chalets, Hotels) Map

Snow Forecast near Biwako Valley

Snow Forecasts for Ski Resorts near Biwako Valley
Ski Area	48 Hr	7 Day
Myoko Suginohara	-	91cm 36in
Tsugaike Kogen	-	91cm 36in
Myoko Ikenotaira	-	88cm 35in
Togari Onsen	-	72cm 28in
Myoko Pine Valley	-	59cm 23in
Happo One	-	16cm 6in
Hakuba 47	-	14cm 5in

How reliable is the snow in Biwako Valley?

Biwako Valley typically sees a snow depth of around 1 to 2 meters throughout the season, with reliable snowfall from December to March. For the latest snow conditions, check updates on J2Ski.

Off-Piste Safety in Biwako Valley

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