Weather forecast builder for the GR54

Plan your walk with weather from 17 years of history—choose towns and dates below.

About weather on the GR54

The GR54 (Tour de l’Oisans et des Écrins) crosses high passes and deep valleys, where weather shifts quickly between bright windows and cloudier, wetter spells. June, July, and August generally align with the prime hiking window, when the high cols are usually passable, refuges and shuttles operate, and daylight is long. Earlier or later periods bring greater variability: lingering high‑level snow and lively stream crossings in spring, or chillier nights, occasional dustings aloft, and winding‑down services into autumn and winter.

• Winter: Deep winter brings frequent cloud, regular snowfall on higher ground, brief clear breaks, cold valleys, and windier, very cold passes.
• Spring: Unsettled and changeable, with mixed cloud and bright spells, frequent showers, valley mildness contrasting lingering wintry conditions and fresh snow high.
• Summer: Alpine summer features bright mornings, building afternoon clouds, local showers or short thunderstorms, warm valleys, cooler cols, and occasional brief wintry flurries.
• Autumn: Changeable conditions with alternating sunshine and cloud, frequent light showers, some steady rain, crisp higher ground, early snow dustings, and progressively colder nights.

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