Urgent! What's the weather like in France, Italy and Switzerland in Europe in late July and early August?

Italy is located in most parts of the southern peninsula, with an annual rainfall of 500 ~ 1500mm, with more rain in winter. However, in southern Sicily and Sardinia, the annual rainfall is very small, with an average of below 500 mm, 23-26 degrees. There is a lot of rainfall in the Alps. In July 15-25 degrees in France, the weather is warm and the sunshine is pleasant during the day. You can wear a T-shirt, but it may be cloudy at night. The mountain shape of Switzerland makes the climate in Switzerland very changeable. Switzerland is not hot in summer, with abundant sunshine around 20-25℃. There is a great temperature difference between morning and evening in summer in Switzerland, and there are often storms in mountainous areas. Don't be too ostentatious when you go