Chamonix Weather Today Friday 17 May

Sunny morning, cool at first, then mild - locally unstable this afternoon

Cloudiness: clear to slightly cloudy this morning - development of cumulus clouds during the afternoon, locally quite voluminous, but starting to dissipate at dusk - sunshine: 70%

Isolated showers not impossible between 4:00 p.m. and 7:00 p.m. - thunder not impossible either

Winds according to altitude
in the valley: calm -> weak SW -> very weak this evening
in medium mountains: weak WSW -> weak to moderate SW
in high mountains: weak to moderate WSW -> moderate SW

Temperatures in the valley:
min, +6°C
max, +15°C

Altitude of the isotherms:
0°C, 2300 -> 2600 m
-10°C, 3900 -> 4100 m

Saturday 18 May

Beautiful morning clearing, followed by rising clouds, then stormy showers - windy in the mountains

Cloudiness: nice clearing until mid-to-late morning - large cloud developments in the instability which then resumes, from the SW, or possibly from Italy - sunshine: 40%

Thunderstorms in the afternoon - rain-snow limit around 2300, even 2200 m - variable quantities depending on winds and exposure, rather weak overall

Wind aloft: SW moderate -> moderate to strong - locally strong in the middle of the afternoon

Temperatures in the valley:
min, +4°C
max, +16°C

Sunday 19 May

Instability decreases, allowing better sunshine - the risk of thunderstorms persists

Cloudiness: slightly cloudy until midday or early afternoon - sunshine: 50%

Risk of isolated thunderstorms during the afternoon

Wind aloft: moderate SW – temporarily moderate to strong

Temperatures in the valley: minimum decreasing - maximum increasing

Monday 20 to Wednesday 22 May Chamonix Weather