Fully

This Monday, sunny weather in all regions. A few thin high-altitude clouds at times and the development of harmless cumulus clouds over the hills during the day. Warm temperatures during the day at all altitudes and a calm, clear, and mild evening. Monday, sunny weather in all regions. A few thin high-altitude clouds at times and the development of small cumulus clouds in the Alps and Prealps in the afternoon. Warm temperatures during the day at all altitudes and a calm, clear, and mild evening. Temperatures forecasted in the Rhône plain: minimums 12 to 15°, maximums 27 to 29°. In the resorts at around 1500m: minimums 8 to 10°, maximums 20 to 21°. On the summits: 9/14° at 2000m, 0/3° at 3000m. Zero-degree isotherm: 3300 m. Sometimes moderate breezes during the day in the plains and valleys, moderate from the west in the high mountains.

Tuesday, generally sunny weather with the occasional passage of high-altitude clouds that may sometimes reduce sunlight. Warm temperatures during the day with maximums of 29 to 31 degrees in the plains and 22 to 24 degrees at around 1500 meters altitude. Wednesday and Thursday, very sunny and very hot conditions with maximum temperatures of 32 to 34 degrees in the plains and still 25 to 27 degrees at around 1500m altitude. Isolated thunderstorms in the mountains on Thursday evening. Friday, sunny and very hot weather but more unstable. Some showers and thunderstorms are also likely in the mountains in the afternoon and may sometimes spill over into the lowland regions. Saturday and Sunday, persistent sunny and very hot weather with maximum temperatures of 33 to 35 degrees in the plains and 25 to 27 degrees at around 1500m altitude. A few isolated thunderstorms in the mountains. Likely continuation of this heatwave episode for a good part of next week.