Semily 7-Day Snow Forecast

Semily Long-Range Snow Forecast Updated today

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Updated 20 September 2026 02:45 PDT

Long-Range Snow Forecast for Semily

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

For Forecast detail, see below.

Semily Snow Forecast Highlights

When will there be fresh snow in Semily?

Semily Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (1,230ft)
Next Snow?
There is no snow currently in the forecast for Semily.

Long-range Snow Outlook for Semily

Snowfall

Snow Line

Max 67°F
Min 40°F

Snow unlikely

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Semily 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 Semily from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Sun 20	Cloudy.	Max 67°F Min 51°F
Mon 21	Light drizzle.	Max 58°F Min 49°F
Tue 22	Clear spells.	Max 58°F Min 48°F
Wed 23	Clear spells.	Max 60°F Min 42°F
Thu 24	Fair.	Max 61°F Min 40°F
Fri 25	Cloudy.	Max 61°F Min 42°F
Sat 26	Clear sky.	Max 67°F Min 48°F

No significant snowfall is forecast for this period.

This Snow Forecast for Semily, Czech Republic 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 Semily, 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.

Semily Snow Forecast updated at 02:45 PDT, next update expected imminently.

Ensemble forecast for Semily, Czech Republic at 984ft

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.

Czech Republic Accommodation (Apartments, Chalets, Hotels) Map

Snow Reliability

Semily has a reliable snow record, typically boasting a snow depth of 60-100 cm during peak season. With consistent snowfall from December to March, it's advisable to check the latest snow conditions on J2Ski for current updates.

Off-Piste Safety in Semily

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