The Toubkal summit is accessible without crampons from roughly mid-June to mid-October. July and August are the busiest months — the path to the refuge fills with trekkers from Europe and the huts book up quickly. June and September offer the better balance: fewer people, stable weather, and the snowfields still impressive above 3,500 metres.
Spring (April–May) is beautiful in the lower valleys — the walnut trees leaf out, barley fields turn green, and Sidi Chamarouch waterfall runs at full force — but the high passes hold snow well into May and the summit requires crampons and an ice axe until June. Winter ascents are serious mountaineering undertakings with ice, cold bivouacs, and route-finding in snow; experienced alpinists do them, but they are not casual expeditions.
The village is accessible year-round and the lower valley walks are possible in all seasons. Rain in the valleys usually means snow above 2,500 metres. The road from Asni can ice over in hard winters and is occasionally impassable for a day or two.