Arc 1800 7-Day Snow Forecast

Arc 1800 Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 01 June 2026 19:44 UTC

Long-Range Snow Forecast for Arc 1800

Long-range (14 to 45 days) from 2 June.

For Forecast detail, see below.

Arc 1800 Snow Forecast Highlights

When will there be fresh snow in Arc 1800?

Arc 1800 Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (2,515m)
Next Snow Expected	3 June
Next Snow Amount	2cm 1in
Next 48 Hours	2cm 1in
Next 7 Days	2cm 1in
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Long-range Snow Outlook for Arc 1800

Snowfall

Snow Line

Max 15℃ 59°F
Min 3℃ 38°F

17cm 7in New Snow

Snow Line from 2,985m 9,793ft to 2,046m 6,713ft , with rain below.

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Arc 1800 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 Arc 1800 from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Tue 02	up to 3cm up to 1in New Snow Light snow at altitude, light drizzle below. Snow Line from 2,985m 9,793ft to 2,492m 8,176ft , with rain below.	Max 15℃ 59°F Min 6℃ 43°F
Wed 03	up to 4cm up to 2in New Snow Light snow at altitude, light drizzle below. Snow Line from 2,662m 8,734ft to 2,246m 7,369ft , with rain below.	Max 12℃ 53°F Min 4℃ 40°F
Thu 04	up to 7cm up to 3in New Snow Snow showers at altitude, rain showers below. Snow Line from 2,985m 9,793ft to 2,462m 8,077ft , with rain below.	Max 13℃ 55°F Min 4℃ 40°F
Fri 05	up to 3cm up to 1in New Snow Cloudy. Snow Line from 2,338m 7,671ft to 2,046m 6,713ft , with rain below.	Max 11℃ 52°F Min 3℃ 38°F
Sat 06	Cloudy.	Max 11℃ 52°F Min 5℃ 40°F
Sun 07	Fair.	Max 15℃ 58°F Min 5℃ 41°F
Mon 08	Cloudy.	Max 15℃ 59°F Min 6℃ 43°F

This Snow Forecast for Arc 1800, France 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 Arc 1800, 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.

Arc 1800 Snow Forecast updated at 19:44 UTC, next update expected imminently.

Long-range ensemble forecasts for Arc 1800 will be available shortly.

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 Forecast near Arc 1800

Snow Forecasts for Ski Resorts near Arc 1800
Ski Area	48 Hr	7 Day
Chamonix	50cm 19in	57cm 23in
Arc 1600	14cm 6in	17cm 7in
Arc 1950	14cm 6in	15cm 6in
Arc 2000	14cm 6in	15cm 6in
Tignes	12cm 5in	15cm 6in
Les Menuires	12cm 5in	14cm 5in
Val Thorens	12cm 5in	14cm 5in
La Plagne	9cm 4in	11cm 4in

Snow Reliability

Arc 1800 enjoys reliable snow conditions, with an average snow depth of 150 cm during peak season and consistent snowfall throughout the winter. For the latest snow information, be sure to check J2Ski for up-to-date conditions.

Off-Piste Safety in Arc 1800

Before skiing or snowboarding off-piste in Arc 1800, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.