Wisse Tschuggen

This Saturday will be sunny in all regions, with mostly cloudless skies, apart from the development of harmless cumulus over the higher ground in the afternoon. Very warm temperatures during the day, with calm, mild and clear evenings. Zero degree isotherm reaching record highs for a month of June, at altitudes of over 5000m! Temperatures forecast for the Rhône plain: lows 15 to 18°, highs 31 to 34°. At stations around 1500m: lows 12° to 14°, highs 25° to 27°. On summits: 13/20° at 2000m, 5/12° at 3000m. Isotherm 0°: 5100m. Breezy conditions on the plains and in the valleys, light to moderate northwesterly in the high mountains.

Sunday will see blazing sunshine and high temperatures during the day, with highs of 32 to 34 degrees in the lowlands and 26 to 28 degrees around 1500m altitude. Development of cumulus clouds over the hills and isolated thunderstorms in the mountains at the end of the day. From Monday to Wednesday, sunny and very hot conditions, with highs of 33 to 35 degrees in the lowlands and 25 to 27 degrees around 1500m altitude. Development of cumulus clouds and a few isolated thunderstorms over the highlands in the afternoons, which could locally spill over onto the plains, particularly on Monday. Thursday: possible rainstorm deterioration accompanied by a welcome drop in temperatures. Friday sees an improvement, with a return to dry, gradually sunny weather and seasonal temperatures. Next weekend could see plenty of sunshine and warm summer temperatures (to be confirmed). Water deficit becoming more and more significant as the days go by.