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Chamonix Weather Today Monday 18 March

Snow and gale in the mountains this morning – improvement this afternoon

Cloudiness: overcast or very cloudy this morning, ceiling often lower than 1800-2000 m - fleeting clearings in the middle of the day, becoming wider in the evening - sunshine: 20%

Precipitation continues and still quite heavy at dawn - evolving into showers at midday, locally heavy, thunderclaps then possible - then quickly becoming scattered this afternoon and ceasing between approximately 2:00 p.m. and 3:00 p.m. - limit rain-snow rising above 2000 m - quantity possible since Sunday evening around 2500 m: 35-50 cm depending on wind exposure

Winds according to altitude
in valley: weak SW - temporarily variable very weak or zero
in mid-mountains: moderate WSW - temporarily moderate to strong -> weak to moderate NNW
in high mountains: WNW gale -> strong NNW

Temperatures in the valley:
min, +5°C
max, +11°C

Altitude of the isotherms:
0°C, 2500 -> 2400 m
-10°C, 4200 -> 3900 -> 4200 m

Tuesday 19 March

Fine weather, slightly overcast sky - cold snap at dawn, then mild spell - maximum rise significantly

Cloudiness: clear or slightly cloudy in the morning - passages of fine high clouds - development of cumulus clouds above the slopes in the afternoon - sunshine: 80%

No precipitation

Wind aloft: NW moderate -> NNW weak to moderate

Temperatures in the valley:
min, 0°C
max, +15°C

Wednesday 20 March

Another beautiful day – the warm weather is getting worse

Cloudiness: clear or slightly cloudy in the morning - development of cumulus clouds above the slopes in the afternoon - high clouds becoming thick from the W in the evening - sunshine: 75%

No precipitation

Wind at altitude: calm -> moderate W

Temperatures in the valley: maximum rising

Thursday 21 to Saturday 23 March Chamonix Weather

THURSDAY: disturbed passage in W flow in the morning, before return of a ridge 1025 of the Atlantic anticyclone, itself well reinforced over the Azores - NW quite strong in the mountains
FRIDAY: uncertain - fairly sunny - high altitude veil at times quite thick in the afternoon - very mild for the season
SATURDAY: deterioration of uncertain extent - polar air trough associated with a fairly deep depression in the North Sea - very choppy weather, snow possible around 1500 m, or even lower the following night.