Grefsenkollen 7-Day Snow Forecast

Grefsenkollen Long-Range Snow Forecast Updated today

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Updated 15 September 2026 17:45 PDT

Long-Range Snow Forecast for Grefsenkollen

Long-range (14 to 45 days) from 16 September.

For Forecast detail, see below.

Grefsenkollen Snow Forecast Highlights

When will there be fresh snow in Grefsenkollen?

Grefsenkollen Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (956ft)
Next Snow?
There is no snow currently in the forecast for Grefsenkollen.

Long-range Snow Outlook for Grefsenkollen

Snowfall

Snow Line

Max 63°F
Min 44°F

Snow unlikely

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Grefsenkollen 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 Grefsenkollen from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Wed 16	Fair.	Max 62°F Min 51°F
Thu 17	Cloudy.	Max 60°F Min 50°F
Fri 18	Cloudy.	Max 60°F Min 48°F
Sat 19	Light drizzle.	Max 63°F Min 50°F
Sun 20	Clear sky.	Max 61°F Min 48°F
Mon 21	Clear sky.	Max 63°F Min 47°F
Tue 22	Cloudy.	Max 56°F Min 44°F

No significant snowfall is forecast for this period.

This Snow Forecast for Grefsenkollen, Norway 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 Grefsenkollen, 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.

Grefsenkollen Snow Forecast updated at 17:45 PDT, next update expected imminently.

Ensemble forecast for Grefsenkollen, Norway at 689ft

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

Grefsenkollen typically enjoys reliable snow conditions, with an average snow depth of around 80 cm during peak season. Regular snowfall ensures a good base, but it's always best to check the latest updates on snow conditions at J2Ski.

Off-Piste Safety in Grefsenkollen

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